BABY LOCK Sofia BL137A - Sewing machine

Sofia BL137A - Sewing machine BABY LOCK - Free user manual and instructions

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Product Type Sewing Machine
Brand Baby Lock
Model Sofia BL137A
Dimensions (approx.) 15 x 7 x 12 inches
Weight (approx.) 15 lbs
Power Supply 120V, 60Hz
Stitch Types Built-in utility and decorative stitches
Buttonhole Style 4-step automatic buttonhole
Needle Threading Automatic needle threader
Bobbin Winding Top-loading bobbin with drop-in winding
Stitch Length and Width Adjustable
Presser Foot System Snap-on presser feet
Free Arm Yes, for sewing sleeves and cuffs
Work Light Built-in LED light
Maintenance Regular cleaning of bobbin case and feeding mechanism; oil as per manual
Safety Features Unplug when not in use; keep fingers away from needle
Spare Parts Available Needles, bobbins, presser feet, belts
Reparability User-serviceable for basic maintenance; professional service for major repairs

Frequently Asked Questions - Sofia BL137A BABY LOCK

How do I thread the upper thread on the Baby Lock Sofia BL137A?
Follow the numbered threading path on the machine. Raise the presser foot, pass the thread through the thread guides, around the tension disc, then through the take-up lever and needle eye. Use the automatic needle threader for ease.
Why is my machine skipping stitches?
Common causes: bent or dull needle, incorrect needle size for fabric, improper threading, or tension issues. Replace the needle and rethread the machine. Ensure the thread is compatible with your project.
How do I wind a bobbin?
Place an empty bobbin on the bobbin winder spindle. Thread the bobbin winder tension disc as shown. Push the bobbin winder to the right, then press the foot pedal. The machine will stop automatically when full.
What tension setting should I use?
Start with a medium setting (around 4). Adjust based on fabric: lighter fabrics need lower tension, heavier fabrics need higher. Always test on a scrap piece first. The tension dial is numbered for easy reference.
How do I clean and maintain my sewing machine?
Unplug the machine. Remove the needle plate and clean the bobbin area with a soft brush. Wipe the exterior with a dry cloth. Oil the machine as directed in the manual. Regular cleaning prevents lint buildup.
What type of needle should I use?
Use home sewing machine needles (e.g., 75/11 for light fabrics, 90/14 for medium, 100/16 for heavy). Change needles after every project or when dull to ensure quality stitches.
How do I sew a buttonhole?
Select the buttonhole stitch. Place the button in the buttonhole foot. Lower the foot and the buttonhole lever. Start sewing; the machine will automatically sew the buttonhole in four steps. Trim the opening with a seam ripper.
Why is the machine noisy or vibrating?
Check if the machine is on a flat, stable surface. Ensure the needle is not bent. Clean out any lint. If noise persists, it may need oiling or professional servicing.
Can I use twin needles?
Yes, the Sofia BL137A supports twin needles. Install a second spool pin, thread both needles, and select a straight stitch. Use for decorative pintucks or parallel stitching.
How do I fix a tangled bobbin thread?
Remove the bobbin and rethread it correctly. Ensure the bobbin is inserted in the correct direction with the thread unwinding clockwise. Clean any lint from the bobbin case. Adjust upper tension if needed.

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USER MANUAL Sofia BL137A BABY LOCK

Sofia

A-LINE SERIES

Model BL137A

Instruction and

Reference Guide

baby lock®

FOR THE LOVE OF SEWING

CONGRATULATIONS ON CHOOSING OUR MACHINE

Your machine is the most advanced computerized household embroidery and sewing machine.

To fully enjoy all the features incorporated, we suggest that you study the manual.

PLEASE READ BEFORE USING THIS MACHINE

For safe operation

  1. Be sure to keep your eye on the needle while sewing. Do not touch the handwheel, thread take-up lever, needle, or other moving parts.

  2. Remember to turn off the power switch and unplug the cord when:

• Operation is completed
- Replacing or removing the needle or any other parts
• A power failure occurs during use
- Maintaining the machine
• Leaving the machine unattended.

  1. Do not store anything on the foot controller.
  2. Plug the machine directly into the wall. Do not use extension cords.

For a longer service life

  1. When storing this machine, avoid direct sunlight and high humidity locations. Do not use or store the machine near a space heater, iron, halogen lamp, or other hot objects.
  2. Use only neutral soaps or detergents to clean the case. Benzene, thinner, and scouring powders can damage the case and machine, and should never be used.
  3. Do not drop or hit the machine.
  4. Always consult the operation manual when replacing or installing any assemblies, the presser feet, needle, or other parts to assure correct installation.

For repair or adjustment

In the event a malfunction occurs or adjustment is required, first follow the troubleshooting table in the back of the operation manual to inspect and adjust the machine yourself. If the problem persists, please consult your local authorized Baby Lock retailer.

The contents of this manual and specifications of this product are subject to change without notice.

For additional product information and updates, visit our web site at www.babylock.com

Introduction

Thank you for purchasing this embroidery and sewing machine. Before using this machine, carefully read the "Important Safety Instructions", and then study this manual for the correct operation of the various functions. In addition, after you have finished reading this manual, store it where it can quickly be accessed for future reference.

Important Safety Instructions

Please read these safety instructions before attempting to use the machine. This machine is intended for household use.

DANGER - To reduce the risk of electric shock:

1 Always unplug the machine from the electrical outlet immediately after using, when cleaning, when making any user servicing adjustments mentioned in this manual, or if you are leaving the machine unattended.

WARNING - To reduce the risk of burns, fire, electric shock, or injury to persons.

2 Always unplug the machine from the electrical outlet when removing covers, lubricating, or when making any adjustments mentioned in the instruction manual.

  • To unplug the machine, switch the machine to the symbol "O" position to turn it off, then grasp the plug and pull it out of the electrical outlet. Do not pull on the cord.
  • Plug the machine directly into the electrical outlet. Do not use an extension cord.
    • Always unplug your machine if the power is cut.

3 Never operate this machine if it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or water is spilled on the unit. Return the machine to the nearest authorized retailer or service center for examination, repair, electrical or mechanical adjustment.

  • While the machine is stored or in use if you notice anything unusual, such as an odor, heat, discoloration or deformation, stop using the machine immediately and unplug the power cord.
  • When transporting the sewing machine, be sure to carry it by its handle. Lifting the sewing machine by any other part may damage the machine or result in the machine falling, which could cause injuries.
  • When lifting the sewing machine, be careful not to make any sudden or careless movements, otherwise you may injure your back or knees.

4 Always keep your work area clear:

  • Never operate the machine with any air openings blocked. Keep ventilation openings of the sewing machine and foot control free from the build up of lint, dust, and loose cloth.
  • Do not store objects on the foot controller.
  • Do not use extension cords. Plug the machine directly into the electrical outlet.

  • Never drop or insert any object into any opening.

  • Do not operate where aerosol (spray) products are being used or where oxygen is being administered.
  • Do not use the machine near a heat source, such as a stove or iron; otherwise, the machine, power cord or garment being sewn may ignite, resulting in fire or an electric shock.
  • Do not place this sewing machine on an unstable surface, such as an unsteady or slanted table, otherwise the sewing machine may fall, resulting in injuries.

5 Special care is required when sewing:

• Always pay close attention to the needle. Do not use bent or damaged needles.
- Keep fingers away from all moving parts. Special care is required around the machine needle.
- Switch the sewing machine to the symbol "O" position to turn it off when making any adjustments in the needle area.
- Do not use a damaged or incorrect needle plate, as it could cause the needle to break.
- Do not push or pull the fabric when sewing, and follow careful instruction when freehand stitching so that you do not deflect the needle and cause it to break.

6 This machine is not a toy:

  • Your close attention is necessary when the machine is used by or near children.
  • The plastic bag that this sewing machine was supplied in should be kept out of the reach of children or disposed of. Never allow children to play with the bag due to the danger of suffocation.
  • Do not use outdoors.

7 For a longer service life:

  • When storing this machine, avoid direct sunlight and high humidity locations. Do not use or store the machine near a space heater, iron, halogen lamp, or other hot objects.
  • Use only neutral soaps or detergents to clean the case. Benzene, thinner, and scouring powders can damage the case and machine, and should never be used.
  • Always consult the operation manual when replacing or installing any assemblies, the presser feet, needle, or other parts to assure correct installation.

8 For repair or adjustment:

  • If the light unit is damaged, it must be replaced by an authorized retailer.
  • In the event a malfunction occurs or adjustment is required, first follow the troubleshooting table in the back of the operation manual to inspect and adjust the machine yourself. If the problem persists, please consult your local authorized retailer.

Use this machine only for its intended use as described in the manual.

Use accessories recommended by the manufacturer as contained in this manual.

Use only the interface cable (USB cable) included with this machine.

The contents of this manual and specifications of this product are subject to change without notice.

For additional product information and updates, visit our web site at www.babylock.com

SAVE THESE INSTRUCTIONS

Federal Communications Commission (FCC) Declaration of Conformity (For USA Only)

Responsible Party: Tacony Corporation

1760 Gilsinn Lane, Fenton, Missouri 63026

declares that the product

Product Name: Baby Lock Sewing Machine

Model Number : BL137A

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  • Consult the retailer or an experienced radio/TV technician for help.
  • The included interface cable should be used in order to ensure compliance with the limits for a Class B digital device.
  • Changes or modifications not expressly approved by Tacony Corporation could void the user's authority to operate the equipment.

Contents

Introduction ....1

Important Safety Instructions ....1

Machine Features 7

Accessories 8

Included accessories 8

Optional accessories 9

Names of Machine Parts and Their Functions 10

Front view 10

Needle and presser foot section 11

Right-side/rear view 11

Operation buttons 12

Operation panel 13

GETTING READY 15

Turning the Machine On/Off 16

Power supply precautions 16

Turning on the machine 17

Turning off the machine 17

LCD (Liquid Crystal Display) Operation ....18

Viewing the LCD 18

Changing the machine settings 19

Checking machine operating procedures 21

Winding/Installing the Bobbin 22

Bobbin precautions 22

Winding the bobbin 22

Installing the bobbin 27

Upper Threading 31

About the spool of thread 31

Threading the upper thread 32

Using the twin needle 36

Replacing the Needle 39

Needle precautions 39

Selecting the needle depending on the thread and fabric types 39

Checking the needle 40

Replacing the needle 41

Replacing the Presser Foot 43

Presser foot precautions 43

Replacing the presser foot 43

Removing and attaching the presser foot holder 45

Sewing Cylindrical Pieces 46

Free-arm sewing 46

SEWING BASICS 47

Sewing 48

General sewing procedure 48

Selecting stitching 49

Positioning the fabric 50

Starting to sew 51

Securing the stitching 53

Cutting the thread 55

Setting the Stitch 57

Adjusting the stitch width 57

Adjusting the stitch length 59

Adjusting the thread tension 59

Useful Functions 61

Automatic sewing reverse/reinforcement stitches 61

Automatically cutting the thread 62

Mirroring stitches 63

Saving stitch settings 64

Useful Sewing Tips 65

Trial sewing 65

Changing the sewing direction 65

Sewing curves 65

Sewing thick fabrics 65

Sewing hook-and-loop fastener 66

Sewing thin fabrics 66

Sewing stretch fabrics 67

Sewing an even seam allowance 67

UTILITY STITCHES 69

Stitch Setting Chart 70

Utility stitches 70

Overcasting Stitches 74

Sewing overcasting stitches using overcasting foot "G" 74

Sewing overcasting stitches using zigzag foot "J" 75

Sewing overcasting stitches using the optional side cutter 76

Basic Stitching 78

Basting 78

Basic stitching 78

Blind Hem Stitching 80

Buttonhole Stitching/Button Sewing 83

Buttonhole sewing 84

Button sewing 88

Zipper Insertion 90

Inserting a centered zipper 90

Inserting a side zipper 92

Sewing Stretch Fabrics and Elastic Tape 95

Stretch stitching 95

Elastic attaching 96

Appliqué, Patchwork and Quilt Stitching 97

Patchwork (crazy quilt) stitching 99

Piecing 99

Quilting 100

Free-motion quilting 102

Reinforcement Stitching 103

Triple stretch stitching 103

Bar tack stitching 103

Darning 106

Eyelet Stitching 108

Decorative Stitching 109

Fagoting 110

Scallop stitching 111

Smocking 112

Shell tuck stitching 113

Joining 114

Heirloom stitching 114

EMBROIDERY 117

Embroidering Neatly 118

What to prepare 118

Embroidery step by step 119

Attaching the Embroidery Foot 120

Attaching the embroidery foot 120

Removing the embroidery foot 122

Attaching the Embroidery Unit 123

Embroidery unit precautions 123

Attaching the embroidery unit 123

Removing the embroidery unit 125

Preparing the Fabric 126

Attaching a stabilizer material to the fabric 126

Setting the fabric in the embroidery frame 127

Attaching the Embroidery Frame 130

Attaching the embroidery frame 130

Removing the embroidery frame 131

Selecting Embroidery Patterns ....132

Copyright information 132

Embroidery pattern types 132

LCD (liquid crystal display) operation 133

Selecting alphanumeric characters 136

Selecting an embroidery pattern 137

Selecting a frame pattern 137

Using an embroidery card 138

Embroidering 139

Embroidering a pattern 139

Appliquéing 141

Editing Patterns 143

Adjusting the layout and the size 143

Adjusting the thread tension 145

Connecting character patterns 146

Resewing 147

Thread runs out partway through a design 148

Stopping while embroidering 148

Using the Memory Function 150

Embroidery data precautions 150

Saving patterns 151

Retrieving embroidery patterns from the computer 152

APPENDIX 155

Care and Maintenance 156

Cleaning the machine surface 156

Cleaning the race 156

Troubleshooting 158

Error messages 163

Adjusting the LCD 167

Operation beep 167

Upgrading Your Machine's Software 168

Index 169

Machine Features

Technical diagram of a sewing machine with numbered parts for identification and assembly reference.

① Automatic thread cutting

The thread can be cut automatically after sewing (page 55, 62).

② Fast bobbin winding system

With the fast and simple bobbin winder, you can wind bobbins with one press of a button (page 22).

③ Built-in stitches

You can select from the built-in utility stitches available (page 70).

④ USB port connector

Various PES embroidery patterns on the website or saved in your PC become available by using the USB cable (page 152).

⑤ Bright light

The convenient LED lamp makes it easy to work on dark fabrics.

⑥ Seven-point feed dogs

Ensure smooth, even feeding of multiple fabric layers and a variety of fabric weights (page 11).

⑦ Quick-set bobbin

You can start sewing without pulling up the bobbin thread (page 27).

⑧ Easy-to-use needle threader

You can thread the needle easily by one press of a lever (page 32).

⑨ Lighted Start/Stop button

When the green light is on, the machine is ready to sew. A red or orange light indicates an error or that the machine is warming up (page 12).

⑩ Embroidery

You can embroider built-in embroidery patterns, alphanumeric characters, framed decorations, designs from optional embroidery cards, and designs imported from your computer (page 117).

Accessories

After opening the box, check that the following accessories are included. If any item is missing or damaged, contact your authorized retailer.

Included accessories

BABY LOCK Sofia BL137A - Included accessories - 1

Note

● Foot controller: Model T

This foot controller can be used on this machine model BL137A.

● The securing screw on the side of the presser foot holder is available through your authorized retailer. (Part code: 132730-122)

BABY LOCK Sofia BL137A - Note - 1

*1 75/11 2 needles, 90/14 2 needles, 90/14 2 needles: Ball point needle (gold colored)

No.Part NamePart CodeNo.Part NamePart Code
1Buttonhole foot "A"XC2691-02318Spool cap (small)130013-124
2Overcasting foot "G"XC3098-03119Extra spool pinXE2241-001
3Monogramming foot "N"XD0810-03120Spool netXA5523-020
4Zipper foot "I"X59370-02121Foot controllerXC8816-021
5Zigzag foot "J" (on machine)XC3021-03122ScissorsXC1807-121
6Blind stitch foot "R"XC4051-03123Disc-shaped screwdriverXC1074-051
7Button fitting foot "M"XE2137-00124Embroidery foot "Q"XD0474-151
8Seam ripperX54243-05125Embroidery set (medium)H 10 cm X W 10 cm(H 4 inches X W 4 inches)EF62:Frame and embroidery sheet
9Bobbin (4)X52800-12026Embroidery bobbin thread(white)BBT-W
10Needle setX58358-02127Accessory bagXC4487-021
11Twin needleX59296-12128Machine coverXE5402-001
12Cleaning brushX59476-02129USB cableXD0745-051
13Eyelet punch135793-00130Instruction and ReferenceGuideXE5404-001
14ScrewdriverXC4237-02131Quick reference guideXE5405-001
15Touch penXE3069-00132Stabilizer182986-024
16Spool cap (large)130012-024
17Spool cap (medium) (on machine)XE1372-001

Optional accessories

The following are available as optional accessories.

1. 2. 3. 4. 5. 6. 7. 8.

No.Part Name Part Code
1Embroidery bobbin thread (black)BBT-B
Embroidery bobbin thread (white)BBT-W
2Embroidery card -
3Embroidery set (small)H 2 cm × W 6 cm(H 1 inch × W 2-1/2 inches)EF61:Frame and embroidery sheet
4Embroidery set (multi position (large))H 17 cm × W 10 cm(H 6-7/10 inches × W 4 inches)EF71:Frame and embroidery sheet
5Quilting guide BLG-QG
6Walking foot BLG-WF
7Open toe quilting foot BLSR-FMO
8Side cutter "S" BLG-SCF

BABY LOCK Sofia BL137A - Optional accessories - 2

Memo

● All specifications are correct at the time of printing. The part codes are subject to change without notice.
- Visit your Baby Lock retailer for a complete listing of optional accessories available for your machine.
- Use Baby Lock embroidery card with your machine. Please see your authorized retailer for availability of embroidery cards or visit the Baby Lock website at www.babylock.com.

Names of Machine Parts and Their Functions

The names of the various parts of the sewing machine and their functions are described below. Before using the sewing machine, carefully read these descriptions to learn the names of the machine parts.

Front view

Labeled diagram of a sewing machine with numbered parts for identification and assembly reference.

① Thread guide cover (page 24, 33) Pass the thread under this thread guide cover when winding the bobbin thread and threading the machine.
② Thread guide (page 24, 33) Pass the thread under this thread guide when winding the bobbin thread and threading the machine.
③ Spool pin (page 23, 32) Place a spool of thread on the spool pin.
④ Bobbin winder (page 22) Use the bobbin winder when winding the bobbin.
⑤ LCD (liquid crystal display) (touch panel) (page 18) Setting for the selected stitch or pattern and error messages appear in the LCD.
⑥ Operation panel (page 13) Use the keys on this panel to select stitches or embroidery patterns, or check how to use the sewing machine, etc.
⑦ Embroidery unit connector slot (page 123) Plug in the connector for the embroidery unit.

⑧ Presser foot lever (page 50) Raise and lower the presser foot lever to raise and lower the presser foot.
⑨ Operation buttons (page 12) Use these buttons to operate the machine.
⑩ Flat bed attachment (page 46) Remove the flat bed attachment when sewing cylindrical pieces such as sleeve cuffs.
⑪ Thread cutter (page 56) Pass the threads through the thread cutter to cut them.
⑫ Needle threader lever (page 35) Use the needle threader lever to thread the needle.
⑬ Thread tension dial (page 59, 145) Adjust the upper thread tension with this dial.
⑭ Thread take-up lever (page 34)
⑮ Bobbin-winding thread guide and pretension disc (page 24) Pass the thread under this thread guide and around the pretension disc when winding the bobbin thread.

Needle and presser foot section

Technical diagram of a sewing machine with numbered parts for identification

① Buttonhole lever (page 86)

Lower the buttonhole lever when sewing buttonholes and bar tacks.

② Thread guide disk (page 34)

Pass the thread through the thread guide disk when using the needle threader to thread the needle.

③ Needle bar thread guide (page 34)

Pass the upper thread through the needle bar thread guide.

④ Needle plate (page 67)

The needle plate is marked with guides for sewing straight seams.

⑤ Needle plate cover (page 156)

Remove the needle plate cover to clean the bobbin case and race.

⑥ Bobbin cover/bobbin case (page 28)

Remove the bobbin cover, and then insert the bobbin into the bobbin case.

⑦ Feed dogs (page 88)

The feed dogs feed the fabric in the sewing direction.

⑧ Presser foot (page 43, 50)

The presser foot applies pressure consistently on the fabric as the sewing takes place. Attach the appropriate presser foot for the stitch selected.

⑨ Presser foot holder (page 45)

The presser foot is installed onto the presser foot holder.

Right-side/rear view

Labeled diagram of a sewing machine with numbered parts for identification

① Handle

Carry the sewing machine by its handle when transporting the machine.

② Handwheel (page 50)

Turn the handwheel toward you (counterclockwise) to raise and lower the needle to sew one stitch.

③ Embroidery card slot (page 138)

Insert the embroidery card.

④ USB port (Type B) (page 152)

Connect the one end of the USB cable to this port and the other to the computer.

⑤ Air vent

The air vent allows the air surrounding the motor to be circulated. Do not cover the air vent while the sewing machine is being used.

⑥ Main power switch (page 17)

Use the main power switch to turn the sewing machine on and off.

⑦ Foot controller jack (page 52)

Insert the plug on the end of the foot controller cable into the foot controller jack.

⑧ Power supply jack (page 17)

Insert the plug on the power supply cord into the power supply jack.

⑨ Drop feed lever (page 88)

Use the drop feed lever to lower the feed dogs.

BABY LOCK Sofia BL137A - Right-side/rear view - 2

Memo

● Refer to pages 10 through 13 while you are learning to use your machine.

Operation buttons

The operation buttons help you to easily perform various basic sewing machine operations.

BABY LOCK Sofia BL137A - Operation buttons - 1

flowchart
graph TD
    A["Start Stop"] --> B["Control Valve ①"]
    A --> C["Control Valve ②"]
    A --> D["Control Valve ③"]
    A --> E["Control Valve ④"]
    A --> F["Control Valve ⑤"]

BABY LOCK Sofia BL137A - Operation buttons - 2

flowchart
graph TD
    A["①"] --> B["②"]
    B --> C["③"]
    C --> D["④"]
    D --> E["⑤"]
    E --> F["⑥"]
    F --> G["⑦"]
    G --> H["⑧"]
    H --> I["⑨"]
    I --> J["⑩"]
    J --> K["⑪"]
    K --> L["⑫"]
    L --> M["⑬"]
    M --> N["⑭"]
    N --> O["⑮"]
    O --> P["⑯"]
    P --> Q["⑰"]
    Q --> R["⑱"]
    R --> S["⑲"]
    S --> T["⑳"]
    T --> U["㉑"]
    U --> V["㉒"]
    V --> W["㉓"]
    W --> X["㉔"]
    X --> Y["㉕"]
    Y --> Z["㉖"]

① Start/stop button

BABY LOCK Sofia BL137A - ① Start/stop button - 1

Press the start/stop button to start or stop sewing. The machine sews at a slow speed at the beginning of sewing while the button is pressed. When sewing is stopped, the needle is lowered in the fabric. For details, refer to "Starting to sew" (page 51).

The button changes color according to the machine's operation mode.

Green: The machine is ready to sew or is sewing.

Red: The machine can not sew.

Orange: The machine is winding the bobbin thread, or the bobbin winder shaft is moved to the right side.

BABY LOCK Sofia BL137A - ① Start/stop button - 2

Memo

- When the foot controller is plugged in, START/ (Start/stop button) cannot be used to start sewing.

② Needle position button

BABY LOCK Sofia BL137A - ② Needle position button - 1

Press the needle position button to raise or lower the needle. Be sure to raise the needle before threading the needle. Use this button to change the sewing direction or for detailed sewing in small areas. Pressing the button twice sews one stitch.

③ Reverse/reinforcement stitch button

BABY LOCK Sofia BL137A - ③ Reverse/reinforcement stitch button - 1

Press the reverse/reinforcement stitch button to sew reverse stitches or reinforcement stitches. Reverse stitches are sewn by keeping the button pressed down to sew in the opposite direction. Reinforcement stitches are sewn by sewing 3 to 5 stitches on top of each other. For details, refer to "Securing the stitching" (page 53).

④ Thread cutter button

BABY LOCK Sofia BL137A - ④ Thread cutter button - 1

Press the thread cutter button after sewing is stopped to cut both the upper thread and the bobbin threads. For details, refer to "Cutting the thread" (page 55).

BABY LOCK Sofia BL137A - ④ Thread cutter button - 2

CAUTION

- Do not press the thread cutter button after the threads have already been cut, otherwise the needle may break, the threads may become tangled or damage to the machine may occur.

BABY LOCK Sofia BL137A - CAUTION - 1

Note

- Do not press the thread cutter button if there is no fabric under the presser foot or while the machine is sewing, otherwise damage to the machine may occur.

- When cutting nylon thread or other special threads, use the thread cutter on the side of the machine. For details, refer to "Using the thread cutter" (page 56).

⑤ Sewing speed controller

BABY LOCK Sofia BL137A - ⑤ Sewing speed controller - 1

Slide the sewing speed controller to adjust the sewing speed.

Operation panel

The front operation panel has an LCD (liquid crystal display) and operation keys.

Diagram of a device control panel with labeled buttons and navigation icons

① LCD (liquid crystal display) (touch panel)

Setting for the selected stitch or pattern and error messages appear in the LCD.

Touch the keys displayed on the LCD with your finger or the touch pen to perform operations.

For details, refer to "LCD (Liquid Crystal Display) Operation" (page 18).

② Back key

BABY LOCK Sofia BL137A - Operation panel - 2

Press to return to the previous screen.

③ Previous page key

BABY LOCK Sofia BL137A - Operation panel - 3

Displays the previous page when there are items that are not displayed on the LCD.

④ Next page key

BABY LOCK Sofia BL137A - Operation panel - 4

Displays the next page when there are items that are not displayed on the LCD.

⑤ Memory key

BABY LOCK Sofia BL137A - Operation panel - 5

Press to enter alphabet character embroidery or embroidery patterns you have edited or adjusted, etc. into the sewing machine memory.

⑥ Utility stitch key

BABY LOCK Sofia BL137A - Operation panel - 6

Press this key to select a utility stitch.

⑦ Embroidery key

BABY LOCK Sofia BL137A - Operation panel - 7

Press this key to sew embroidery.

⑧ Settings key

BABY LOCK Sofia BL137A - Operation panel - 8

Press to set the needle stop position, the buzzer sound, and more.

⑨ Sewing machine help key

BABY LOCK Sofia BL137A - Operation panel - 9

Press to get help on using the sewing machine. Displays simple explanations of setting upper thread / bobbin winding / setting bobbin thread / needle replacement / embroidery unit attachment / embroidery frame attachment / embroidery foot attachment / presser foot replacement.

1 GETTING READY

The various preparations required before starting to sew are described in this chapter.

Turning the Machine On/Off 16

LCD (Liquid Crystal Display) Operation....18

Winding/Installing the Bobbin....22

Upper Threading ....31

Replacing the Needle 39

Replacing the Presser Foot 43

Sewing Cylindrical Pieces....46

Turning the Machine On/Off

This section explains how to turn the sewing machine on and off.

Power supply precautions

Be sure to observe the following precautions concerning the power supply.

BABY LOCK Sofia BL137A - Power supply precautions - 1

WARNING

  • Use only regular household electricity for the power source. Using other power sources may result in fire, electric shock, or damage to the machine.
    ● Make sure that the plugs on the power cord are firmly inserted into the electrical outlet and the power supply jack on the machine.
  • Do not insert the plug on the power cord into an electrical outlet that is in poor condition.
    ● Turn off the main power and remove the plug in the following circumstances:
  • When you are away from the machine
    • After using the machine
  • When the power fails during use
  • When the machine does not operate correctly due to a bad connection or a disconnection
    • During electrical storms

BABY LOCK Sofia BL137A - WARNING - 1

CAUTION

●Use only the power cord included with this machine.
- Do not use extension cords or multi-plug adapters with many other appliances plugged in to them. Fire or electric shock may result.
● Do not touch the plug with wet hands. Electric shock may result.
- When unplugging the machine, always turn off the main power first. Always grasp the plug to remove it from the outlet. Pulling on the cord may damage the cord, or lead to fire or electric shock.
- Do not allow the power cord to be cut, damaged, modified, forcefully bent, pulled, twisted, or bundled. Do not place heavy objects on the cord. Do not subject the cord to heat. These things may damage the cord and cause fire or electric shock. If the cord or plug is damaged, take the machine to your authorized retailer for repairs before continuing use.
● Unplug the power cord if the machine is not to be used for a long period of time. Otherwise a fire may result.

Turning on the machine

Prepare the included power cord.

1 Make sure that the sewing machine is turned off (the main power switch is set to "") and then plug the power supply cord into the power supply jack on the right side of the machine.

2 Insert the plug of the power supply cord into a household electrical outlet.

Diagram showing cable connection to a device with labeled components and a magnified inset of the device's internal structure.

① Power supply jack

3 Press the right side of the main power switch on the right side of the machine to turn the machine on (set it to " |").

BABY LOCK Sofia BL137A - Turning on the machine - 2

The light, LCD and Start (stop button) light up when the machine is turned on.

BABY LOCK Sofia BL137A - Turning on the machine - 3

Memo

- When the machine is turned on, the needle and the feed dogs will make sound when they move; this is not a malfunction.

Turning off the machine

When you have finished using the sewing machine, turn it off. In addition, before transporting the sewing machine to another location, be sure to turn it off.

1 Make sure that the machine is not sewing.

2 Press the left side of the main power switch on the right side of the machine to turn the machine off (set it to "").

BABY LOCK Sofia BL137A - Turning off the machine - 1

The light, LCD and (Star/stop button) go off when the machine is turned off.

3 Unplug the power supply cord from the electrical outlet.

Grasp the plug when unplugging the power supply cord.

4 Unplug the power cord from the power supply jack.

BABY LOCK Sofia BL137A - Turning off the machine - 2

Note

- If a power outage occurs while the sewing machine is being operated, turn off the sewing machine and unplug the power supply cord. When restarting the sewing machine, follow the necessary procedure to correctly operate the machine.

(For U.S.A. only)

- This appliance has a polarized plug (one blade wider than the other). To reduce the risk of electrical shock, this plug is intended to fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install the proper outlet. Do not modify the plug in any way.

LCD (Liquid Crystal Display) Operation

Selected stitch, pattern settings and messages are displayed on the LCD (liquid crystal display) on the front of the sewing machine. Change the screen on the LCD using the keys on the right side of the LCD, and make operations by directly touching the icons with your finger or a touch pen. For details, refer to "Operation panel" (page 13).

Viewing the LCD

When the power is turned on, the LCD comes on. When you touch the LCD screen according to the message displayed on the screen with your finger or a touch pen, the following utility stitch selection screen is displayed.

① ② ③ ④ ⑤ 0.0 mm - 2.5 mm ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ 167

① Selected stitch
② Presser foot to be used
③ Stitches
④ Stitch settings and twin needle sewing
⑤ Stitch width
⑥ Stitch length
⑦ Number of the selected stitch
⑧ Number of stitch selections

⑨ Horizontal mirror image
⑩ Automatic thread cutting
⑪ Automatic reverse/reinforcement
⑫ Single/twin needle sewing and needle stop position

BABY LOCK Sofia BL137A - Viewing the LCD - 2

Memo

● A different screen is displayed when the embroidery unit is attached. The details are explained in "Selecting an embroidery pattern" (page 137).
- Refer to "Error messages" (page 163) for messages displayed on the LCD.
● Depending on the model of sewing machine, an animation may be displayed when the power is turned on. When an animation is displayed, the screen above will be displayed if you touch the LCD with your finger.

Changing the machine settings

Various sewing machine operations and sewing settings can be changed.

The stitch or machine attributes that can be set are listed below. For details on operation, refer to page 20.

Attribute IconDetails Settings
Needle position[HAIZ]Specifies where the needle is positioned when the sewing machine is stopped.Down [G3TZ]
Stitch width control[CKY]Allows the stitch width to be adjusted with the sewing speed controller (page 58).BABY LOCK Sofia BL137A - Changing the machine settings - 1
Thread color displayBABY LOCK Sofia BL137A - Changing the machine settings - 2Changes the thread color display on the embroidery screen (page 133).Thread color/Time to embroider/Needle count/ Thread number (#123)
(When "Thread No.#123" is selected)Embroidery/Country/Madeira poly/Madeira rayon/Sulky/ Robison Anton
Display unit[ZW8]Selects the measurement units that are displayed (only for embroidering) (page 134).mm/INCH
BuzzerBABY LOCK Sofia BL137A - Changing the machine settings - 3Specifies whether or not a beep is sounded with each operation (page 167).[2760]
Opening screen[CHW]Sets whether or not to display the opening screen when the power is turned on.(There are models where this cannot be changed.)[7774]
Initial needle position[S443]Selects whether "1 Straight stitch (left)" or "3 Straight stitch (middle)" that is automatically selected when the machine is turned on.BABY LOCK Sofia BL137A - Changing the machine settings - 4
LanguageBABY LOCK Sofia BL137A - Changing the machine settings - 5Allows the language used in the screens to be changed.English/German/French/ Italian/Dutch/Spanish/ Japanese/Danish/Norwegian/ Finnish/Swedish/Portuguese/ Russian/Korean/Thai/others
LCD brightness Adjust [24DC] brightness of the LCD (page 167).Lighter [2CHK]
EMB.SCS[2702]Displays the stitch count of the total stitches embroidered. The stitch count serves as a reminder to take your machine in for regular servicing. (Contact your authorized retailer for details.)-
Product number NO.:The "NO." is the number for the embroidery and sewing machine.-
Program version Version: Displays the program version. -

BABY LOCK Sofia BL137A - Changing the machine settings - 6

Memo

● The item shown in reverse highlighting are the settings at the time of purchase.

1 Turn on the sewing machine.

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 1

The LCD comes on.

2 Press (Settings key) on the display panel.

User interface toolbar with navigation buttons and icons, including 'Enter', '<', 'Over', and 'Edit'

The setting screen appears.

Press the item to be set.

Switch the screen using (Previous page key) and (Next page key).

- The following screens show their default settings.

NEEDLE POSITION WIDTH CONTROL ON OFF

[NAME OF COLOR] [----] mm

BUZZER ON OFF OPENING ON OFF INITIAL POSITION > [ ENGLISH ]

BRIGHTNESS +

W→EMB.SCS 000000000 NO: ********** VERSION: 1.00

Example: Changing the needle stop position
NEEDLE POSITION WIDTH CONTROL ON OFF

4 When settings are complete, press (Back key).

NEEDLE POSITION WIDTH CONTROL ON OFF

The initial stitch screen appears again.

BABY LOCK Sofia BL137A - When settings are complete, press (Back key). - 2

Memo

  • "NO." is the individual number for the sewing machine.
  • "VERSION" is the program version which is installed in the sewing machine.
    ● Settings that are changed are saved even if the power is turned off.

Checking machine operating procedures

Simple explanations can be referred on the LCD display for the following items.

Displays simple explanations of setting upper thread / bobbin winding / setting bobbin thread / needle replacement / embroidery unit attachment / embroidery frame attachment / embroidery foot attachment / presser foot replacement on the LCD.

1 Turn on the sewing machine.

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 1

The LCD comes on.

2 Press (Sewing machine help key) on the display panel.

User interface toolbar with navigation buttons and icons, likely from a software application

The sewing machine help screen appears.

3 Press the item to be displayed.

Cropped image of a software toolbar with numbered icons for various function keys or tools.

① Upper threading
② Bobbin winding
③ Bobbin installation
④ Needle replacement
⑤ Presser foot replacement
⑥ Embroidery foot attachment
⑦ Embroidery frame attachment
⑧ Embroidery unit attachment

The first screen describing the procedure for the selected topic appears.

4 Press (Next page key) to switch to the next page.

If you press (Previous page key), you return to the previous page.

Press (Back key) to return to the item selection screen.

Example: Upper threading

1/12

2/12

12/12

5 After you finish viewing, press (Back key) two times.

12/12

The initial stitch screen appears again.

Memo

- For details on each topic, refer to the corresponding page in this Operation Manual.

Winding/Installing the Bobbin

This section describes how to wind the thread onto the bobbin, and then insert the bobbin thread.

Bobbin precautions

Be sure to observe the following precautions concerning the bobbin.

BABY LOCK Sofia BL137A - Bobbin precautions - 1

CAUTION

- Only use the Bobbin (part code: X52800-120) designed specifically for this sewing machine. Use of any other bobbin may result in injuries or damage to the machine.

● The included bobbin was designed specifically for this sewing machine. If bobbins from other models are used, the machine will not operate correctly. Use only the included bobbin (part code: X52800-120) or bobbins of the same type (Class 15 plastic bobbins).

Actual size 11.5 mm (7/16 inch) This model Other model

Winding the bobbin

Wind the thread around the bobbin to prepare the bobbin thread.

Technical diagram of a car interior with labeled parts and directional arrows indicating motion or movement.

① Bobbin-winding thread guide
② Bobbin winder shaft
③ Bobbin

BABY LOCK Sofia BL137A - Winding the bobbin - 2

Memo

● The order that the machine should be threaded for winding the bobbin is indicated by a broken line on the sewing machine. Be sure to thread the machine as indicated.

1 Turn on the sewing machine.

BABY LOCK Sofia BL137A - Memo - 1

2 Place the bobbin on the bobbin winder shaft so that the spring on the shaft fits into the notch in the bobbin.

Press down on the bobbin until it snaps into place.

Technical diagram showing a mechanical assembly with labeled parts and a directional arrow indicating motion or force.

① Notch
② Bobbin winder shaft spring

3 Slide the bobbin winder in the direction of the arrow until it snaps into place.

BABY LOCK Sofia BL137A - Memo - 3

natural_image Mechanical assembly diagram showing a rotating component with a green arrow indicating direction (no text or symbols)

START/↑(Start/stop button) lights up in orange.

4 Pick up the spool pin and remove the spool cap that is inserted onto the spool pin.

Diagram of a mechanical device with labeled parts and directional arrows indicating motion or force

① Spool cap
② Spool pin

5 Place the spool of thread for the bobbin onto the spool pin.

Slide the spool onto the pin so that the spool is horizontal and the thread unwinds to the front at the bottom.

BABY LOCK Sofia BL137A - Memo - 5

natural_image Mechanical diagram showing a rotating spring on a lever with directional arrows indicating motion (no text or symbols)

BABY LOCK Sofia BL137A - Memo - 6

Memo

● For embroidering, use the embroidery bobbin thread.

BABY LOCK Sofia BL137A - Memo - 1

Note

- If the spool is not positioned so that the thread unwinds correctly, the thread may become tangled around the spool pin.

6 Slide the spool cap onto the spool pin and return the spool pin to its original position.

Slide the spool cap as far as possible to the right as shown, with the rounded side on the left.

BABY LOCK Sofia BL137A - Note - 1

BABY LOCK Sofia BL137A - Note - 2

CAUTION

  • If the spool or the spool cap is not positioned correctly, the thread may become tangled around the spool pin or the machine may be damaged.
    ●Three spool cap sizes are available, allowing you to choose a spool cap that best fits the size of spool being used. If the spool cap is too small for the spool being used, the thread may catch on the slit in the spool or the machine may be damaged.

Diagram showing two types of textile or fabric patterns: a circle and a cross, with no text or symbols present.

BABY LOCK Sofia BL137A - CAUTION - 2

BABY LOCK Sofia BL137A - CAUTION - 3

BABY LOCK Sofia BL137A - CAUTION - 4

BABY LOCK Sofia BL137A - CAUTION - 5

BABY LOCK Sofia BL137A - CAUTION - 6

Note

- When sewing with fine, cross-wound thread, use the small spool cap, and leave a small space between the cap and the spool.

Diagram of a mechanical device with numbered components and labeled parts, likely illustrating a motion or assembly process.

① Spool cap (small)

② Spool (cross-wound thread)

③ Space

- When using thread that winds off quickly, such as transparent nylon thread or metallic thread, place the spool net over the spool before placing the spool of thread onto the spool pin. If the spool net is too long, fold it to fit the size of the spool.

When the spool net is used, the upper thread tension may become tighter. Before sewing, refer to "Adjusting the thread tension" (page 59).

BABY LOCK Sofia BL137A - Note - 2

flowchart
graph TD
    A["Step ①: Cylinder"] --> B["Step ②: Axial"]
    B --> C["Step ③: Axial"]
    C --> D["Step ④: Axial"]
    D --> E["Step ⑤: Axial"]

① Spool net
② Spool
③ Spool cap
④ Spool pin

BABY LOCK Sofia BL137A - Note - 3

Pull the thread from the spool and pass the thread under the hook of thread guide.

Technical diagram showing hands operating a mechanical device with labeled parts and directional arrows indicating assembly or repair.

① Thread guide

BABY LOCK Sofia BL137A - Note - 5

Pass the thread behind the thread guide cover and to the front.

While holding the thread near the spool with your right hand, pull the thread with your left hand as shown below.

Technical diagram showing mechanical assembly with labeled components and directional arrows indicating motion or force

① Thread guide cover

BABY LOCK Sofia BL137A - Note - 7

Pull the thread to the right, pass it under the hook of the bobbin-winding thread guide, and then wind the thread counterclockwise under the pretension disc, pulling it in as far as possible.

BABY LOCK Sofia BL137A - Note - 8

natural_image Illustration of hands performing a mechanical operation with arrows indicating motion (no text or symbols)

① Bobbin-winding thread guide

Make sure that the thread passes under the pretension disk.

Diagram illustrating a mechanical press or lever mechanism with labeled parts and directional arrows indicating motion.

② Hook
③ Pretension disk
④ Pull it in as far as possible.

10 Wind the end of the thread clockwise around the bobbin five or six times.

While using your left hand to hold the thread that was passed through the bobbin-winding thread guide, use your right hand to wind the end of the thread.

Wind five or six times.

BABY LOCK Sofia BL137A - Wind the end of the thread clockwise around the bobbin five or six times. - 1

natural_image Mechanical diagram showing a spring mechanism with a rotating component (no text or labels)

BABY LOCK Sofia BL137A - Wind the end of the thread clockwise around the bobbin five or six times. - 2

CAUTION

●Be sure to pull the thread tightly and wind it clockwise. If the thread is wound counterclockwise, the thread may wind around the bobbin winder shaft.

11 Pass the end of the thread through the guide slit in the bobbin winder seat, and then pull the thread to the right to cut it.

Technical diagram showing a mechanical assembly with labeled component ① and directional arrow

① Guide slit in bobbin winder seat (with built-in cutter)

BABY LOCK Sofia BL137A - Pass the end of the thread through the guide slit in the bobbin winder seat, and then pull the thread to the right to cut it. - 2

CAUTION

- Be sure to cut the thread as described. If the bobbin is wound without cutting the thread using the cutter built into the slit in the bobbin winder seat, the thread may become tangled in the bobbin or the needle may bend or break when the bobbin thread starts to run out.

BABY LOCK Sofia BL137A - CAUTION - 1

Memo

● Make sure that the thread is correctly set before starting the bobbin winding. Otherwise the thread may become tangled and fail to wind the thread.

12 Slide the sewing speed controller to the right.

Diagram showing fluid flow through a channel with directional arrows and labeled component ①

① Speed controller

BABY LOCK Sofia BL137A - Slide the sewing speed controller to the right. - 2

Note

- In the setting screen be sure the stitch width control setting is "OFF" before winding bobbin. For details, refer to "Adjusting stitch width using the sewing speed controller" (page 58).

12 Press (Start/stop button) once.

When the foot controller is plugged in, press down on the foot controller.

Technical diagram showing a mechanical or electrical component with labeled parts and a numbered annotation.

① Start/stop button

The bobbin starts winding and "Winding bobbin thread..." is displayed on the LCD screen.

BABY LOCK Sofia BL137A - Press (Start/stop button) once. - 2

Note

- Do not get away from the machine while winding the bobbin. Make sure the bobbin thread is being wound correctly. If the bobbin thread is wound incorrectly, press (start/stop button) or operate the foot controller immediately to stop the bobbin winding.

14 When the bobbin winding stops or becomes slow, press (Start/stop button) once to stop the machine.

When the foot controller is plugged in, remove your foot from the foot controller.

The bobbin winding will stop.

BABY LOCK Sofia BL137A - When the bobbin winding stops or becomes slow, press (Start/stop button) once to stop the machine. - 1

CAUTION

- When the bobbin winding stops or becomes slow, stop the machine. Otherwise, the sewing machine may be damaged.

15 Cut the thread with scissors, slide the bobbin winder shaft to the left, and then remove the bobbin from the shaft.

Technical diagram showing mechanical assembly steps with labeled components and directional arrows

BABY LOCK Sofia BL137A - CAUTION - 2

Memo

- If the bobbin winder shaft is set to the right side, the needle will not move. (Sewing is impossible.)

16 Slide the sewing speed controller back to preferred sewing speed.

BABY LOCK Sofia BL137A - Memo - 1

Memo

- When the sewing machine is started or the handwheel is turned after winding the bobbin, the machine will make a clicking sound; this is not a malfunction.

■When the thread became tangled under the bobbin winder seat.

If the bobbin winding starts when the thread is not passed under the pretension disk of the bobbin-winding thread guide correctly, the thread may become tangled under the bobbin winder seat. In such a case, wind off the thread according to the following procedure.

Technical diagram of a mechanical assembly with labeled parts ① and ②

① Thread
② Bobbin winder seat

BABY LOCK Sofia BL137A - Memo - 2

CAUTION

●Do not remove the bobbin winder seat even if the thread become tangled under the bobbin winder seat. It may result in injuries.
●Do not remove the screw of the bobbin winder presser, otherwise the machine may be damaged; you cannot wind off the thread by removing the screw.

BABY LOCK Sofia BL137A - CAUTION - 1

natural_image Technical line drawing of a mechanical clamp or spring assembly (no text or symbols)

① Screw of the bobbin winder presser

If the thread become tangled under the bobbin winder seat, press Start/stop button) once to stop the bobbin winding.

When the foot controller is plugged in, remove your foot from the foot controller.

Technical diagram showing a mechanical or fluid system with labeled components and a numbered marker '①'

① Start/stop button

BABY LOCK Sofia BL137A - CAUTION - 3

Cut the thread with scissors beside the bobbin-winding thread guide.

Technical diagram of a mechanical device with labeled parts and a tool, showing assembly steps and components.

① Bobbin-winding thread guide

BABY LOCK Sofia BL137A - CAUTION - 5

Slide the bobbin winder shaft to the left, and then remove the bobbin from the shaft.

BABY LOCK Sofia BL137A - CAUTION - 6

natural_image Mechanical assembly diagram showing a shaft, housing, and spring mechanism with directional arrows (no text or labels)

BABY LOCK Sofia BL137A - CAUTION - 7

Hold the thread end with your left hand, and wind off the thread clockwise near the bobbin with your right hand as shown below.

BABY LOCK Sofia BL137A - CAUTION - 8

natural_image Illustration of hands performing a mechanical operation with a rotating component (no text or symbols)

BABY LOCK Sofia BL137A - CAUTION - 9

Wind the bobbin again.

BABY LOCK Sofia BL137A - CAUTION - 10

Note

● Make sure that the thread passes under the pretension disk of the bobbin-winding thread guide correctly (page 24).

Installing the bobbin

Install the bobbin wound with thread.

BABY LOCK Sofia BL137A - Installing the bobbin - 1

CAUTION

●Use a bobbin that has been correctly wound with thread, otherwise the needle may break or the thread tension will be incorrect.

BABY LOCK Sofia BL137A - CAUTION - 1

●The included bobbin was designed specifically for this sewing machine. If bobbins from other models are used, the machine will not operate correctly. Use only the included bobbin (part code: X52800-120) or bobbins of the same type (Class 15 plastic bobbins).

Actual size 11.5 mm (7/16 inch) This model Other model

BABY LOCK Sofia BL137A - CAUTION - 3

Memo

● The order that the bobbin thread should be passed through the bobbin case is indicated by marks that surround the bobbin case.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Technical line drawing of a mechanical device with no visible text or symbols

1 Press (Needle position button) once or twice to raise the needle, and then raise the presser foot lever.

Diagram showing fluid flow through a pipe with labeled components and directional arrow

① Needle position button
② Presser foot lever

2 Turn off the sewing machine.

BABY LOCK Sofia BL137A - Memo - 3

3 Slide the bobbin cover latch to the right.

Diagram of a mechanical device with labeled parts ① and ②, showing internal components and directional arrow.

① Bobbin cover
② Latch

The bobbin cover opens.

4 Remove the bobbin cover.
5 Hold the bobbin with your right hand and hold the end of the thread with your left hand.

BABY LOCK Sofia BL137A - Memo - 5

natural_image Illustration of hands holding a thread spool with a needle (no text or symbols)

- Be careful not to drop the bobbin.

6 Insert the bobbin into the bobbin case with your right hand.

BABY LOCK Sofia BL137A - Memo - 6

natural_image Hand inserting a component into a device (no text or symbols visible)

- Be sure to insert the bobbin correctly.

CAUTION

●Be sure to insert the bobbin and depress it to the bottom with your finger. Otherwise, the thread may break or the thread tension will be incorrect.
●Be sure to thread the machine as indicated. Otherwise, the thread may break or the thread tension will be incorrect.

7 Lightly hold down the bobbin with your right hand, and then guide the thread as shown with your left hand.

BABY LOCK Sofia BL137A - CAUTION - 1

natural_image Diagram of a hand operating a device with a green circular component and a green curved arrow indicating rotation (no text or symbols)

8 Pass the thread through the slot as shown, and then pull the thread out toward the front.

BABY LOCK Sofia BL137A - CAUTION - 2

natural_image Technical diagram of a mechanical assembly with directional arrows indicating motion (no text or symbols)

① Cutter
The cutter cuts the thread.

BABY LOCK Sofia BL137A - CAUTION - 3

Note

- If the thread is not correctly inserted through the tension-adjusting spring of the bobbin case, it may cause incorrect thread tension (page 59).

Diagram illustrating a mechanical or electrical process with labeled components and directional indicators

① Tension-adjusting spring

BABY LOCK Sofia BL137A - Note - 2

Reattach the bobbin cover.

Insert the tab in the lower-left corner of the bobbin cover, and then lightly press down on the right side.

Diagram showing two views of a car body component with numbered parts and directional arrows indicating movement or change.

① Tab

② Lower-left corner

The bobbin threading is finished. You can begin sewing without pulling up the bobbin thread.

Next, thread the upper thread. Continue with the procedure in "Upper Threading" (page 31).

BABY LOCK Sofia BL137A - Reattach the bobbin cover. - 2

Memo

- When making gathers or before free-motion quilting, pull up the bobbin thread by following the procedure in "When pulling up the bobbin thread may be necessary".

■When pulling up the bobbin thread may be necessary

When making gathers or before free-motion quilting, first pull up the bobbin thread as described below.

BABY LOCK Sofia BL137A - ■When pulling up the bobbin thread may be necessary - 1

Thread the upper thread.

• Refer to "Upper Threading" (page 31).

BABY LOCK Sofia BL137A - Thread the upper thread. - 1

Insert the bobbin into the bobbin case.

- Refer to steps 3 through 6 of "Installing the bobbin" (page 28).

BABY LOCK Sofia BL137A - Insert the bobbin into the bobbin case. - 1

Pass the bobbin thread through the slot.

BABY LOCK Sofia BL137A - Pass the bobbin thread through the slot. - 1

natural_image Illustration of hands holding a mechanical component with a green arrow indicating rotation (no text or symbols)

BABY LOCK Sofia BL137A - Pass the bobbin thread through the slot. - 2

Note

● Do not cut the thread with the cutter.

- Remove the bobbin cover.

BABY LOCK Sofia BL137A - Note - 1

While lightly holding the upper thread with your left hand, press (Needle position button) once or twice to raise the needle.

Diagram showing a hand pressing a button on a car interior, labeled with number ①

BABY LOCK Sofia BL137A - While lightly holding the upper thread with your left hand, press (Needle position button) once or twice to raise the needle. - 2

Needle position button

BABY LOCK Sofia BL137A - While lightly holding the upper thread with your left hand, press (Needle position button) once or twice to raise the needle. - 3

The bobbin thread is looped around the upper thread and can be pulled up.

⑤ Carefully pull the upper thread upward to pull out the end of the bobbin thread.

BABY LOCK Sofia BL137A - While lightly holding the upper thread with your left hand, press (Needle position button) once or twice to raise the needle. - 4

natural_image Line drawing of a sewing machine needle stitching fabric (no text or symbols)

6 Pull out about 10-15 cm (4-5 inches) of the bobbin thread under the presser foot toward the rear of the machine.

BABY LOCK Sofia BL137A - While lightly holding the upper thread with your left hand, press (Needle position button) once or twice to raise the needle. - 5

natural_image Line drawing of a sewing machine needle stitching fabric (no text or symbols)

⑦ Reattach the bobbin cover. Insert the tab in the lower-left corner of the bobbin cover, and then lightly press down on the right side.

Diagram showing two views of a mechanical component with numbered parts and directional arrows indicating movement or force.

① Tab

② Lower-left corner

Upper Threading

This section describes how to position the spool for the upper thread, and then thread the needle.

Technical diagram of a sewing machine with labeled parts and directional arrows indicating motion or movement

① Mark on handwheel

BABY LOCK Sofia BL137A - Upper Threading - 2

CAUTION

- When threading the upper thread, carefully follow the instructions. If the upper threading is not correct, the thread may become tangled or the needle may bend or break.

●The needle threader can be used with a 75/11 through 100/16 home sewing machine needle. When using special thread such as transparent nylon thread or metallic thread, the needle threader cannot be used.

●Thread with a thickness of 130/20 or thicker cannot be used with the needle threader.

●The needle threader cannot be used with the wing needle or the twin needle.

- If the needle threader cannot be used, refer to "Threading the needle manually (without using the needle threader)" (page 36).

●Never use a thread weight of 130/20 or lower.

●Use the needle and the thread in the correct combination. For details on the correct combination of needles and threads, refer to "Selecting the needle depending on the thread and fabric types" (page 39).

About the spool of thread

Information about the spools of thread is described below.

BABY LOCK Sofia BL137A - About the spool of thread - 1

CAUTION

- If the spool or the spool cap is not positioned correctly, the thread may become tangled around the spool pin or the needle may break.

●Three spool cap sizes are available, allowing you to choose a spool cap that best fits the size of spool being used. If the spool cap is too small for the spool being used, the thread may catch on the slit in the spool or the needle may break.

Diagram showing two labeled parts: a circle with a horizontal bar and an 'X' symbol, likely illustrating a counting or measurement concept.

Threading the upper thread

Set the spool of thread on the spool pin, and then thread the machine.

BABY LOCK Sofia BL137A - Threading the upper thread - 1

CAUTION

- When threading the upper thread, carefully follow the instructions. If the upper threading is not correct, the thread may become tangled or the needle may bend or break.

1 Turn on the machine.

BABY LOCK Sofia BL137A - CAUTION - 1

2 Raise the presser foot lever.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrow

① Presser foot lever

The presser foot is raised.

BABY LOCK Sofia BL137A - CAUTION - 3

Memo

- If the presser foot is not raised, the sewing machine cannot be threaded.

3 Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrows

① Needle position button

BABY LOCK Sofia BL137A - Memo - 2

Note

● The needle is correctly raised when the mark on the handwheel is at the top, as shown below. Check the handwheel and, if this mark is not at this position, press ⏻ (Needle position button) until it is.

Technical diagram showing a mechanical component with labeled parts and a highlighted circular feature

① Mark on handwheel

4 Pick up the spool pin and remove the spool cap that is inserted onto the spool pin.

Diagram of a mechanical device with labeled parts and directional arrows indicating motion or force

① Spool pin ② Spool cap

5 Place the spool of thread onto the spool pin. Slide the spool onto the pin so that the spool is horizontal and the thread unwinds to the front at the bottom.

BABY LOCK Sofia BL137A - Note - 3

natural_image Diagram of a mechanical device with rotating components and directional arrows indicating motion (no text or symbols)

BABY LOCK Sofia BL137A - Note - 4

Slide the spool cap onto the spool pin and return the spool pin to its original position.

Slide the spool cap as far as possible to the right as shown, with the rounded side on the left.

BABY LOCK Sofia BL137A - Note - 5

BABY LOCK Sofia BL137A - Note - 6

CAUTION

- If the spool or the spool cap is not positioned correctly, the thread may become tangled around the spool pin or the needle may break.

BABY LOCK Sofia BL137A - CAUTION - 1

Pull the thread from the spool and pass the thread under the hook of the thread guide.

Technical diagram showing hands operating a mechanical device with labeled component ①

①Thread guide

BABY LOCK Sofia BL137A - CAUTION - 3

Pass the thread behind the thread guide cover and to the front.

While holding the thread near the spool with your right hand, pull the thread with your left hand as shown below.

Technical diagram illustrating a sewing machine tool path with labeled parts and checkmark indicators for selection.

①Thread guide cover
②Thread guide spring
③Thread
④When the presser foot lever is lowered

BABY LOCK Sofia BL137A - CAUTION - 5

Note

  • When passing the thread behind the thread guide cover, be sure to use both hands. If you do not hold the thread with your right hand, the thread will be loose and you will not be able to secure the thread in the thread spring guide. It may cause incorrect thread tension.
    ● Make sure that the presser foot lever is raised before passing the thread behind the thread guide cover. If the presser foot lever is lowered, the thread guide spring is shut and you cannot hang the thread on the thread guide spring correctly.

BABY LOCK Sofia BL137A - Note - 1

Pass the thread through the guides in the order shown below.

Diagram of a sewing machine's side panel with numbered parts and directional arrows indicating movement or force.

10 Make sure that the thread is passed into the thread take-up lever as shown below.

Technical diagram showing a mechanical assembly with labeled parts and a magnified inset view of a tool interacting with a component.

① Thread take-up lever

BABY LOCK Sofia BL137A - Note - 4

Memo

- If the needle is not raised, you cannot pass the thread into the thread take-up lever. Be sure to press the needle position button to raise the needle before passing the thread into the thread take-up lever.

11 Pass the thread behind the needle bar thread guide.

The thread can easily be passed behind the needle bar thread guide by holding the thread in your left hand, then feeding the thread with your right hand, as shown.

Diagram illustrating a procedure for using a tool, showing step 1 and step 6 with a downward arrow indicating direction.

① Needle bar thread guide

12 Lower the presser foot lever to lower the presser foot.

Technical diagram showing a mechanical or structural component with labeled parts and an arrow indicating direction, marked as figure ①.

① Presser foot lever

13 Pull the end of the thread, which has been passed through the needle bar thread guide, to the left, then pass the thread through the notch of the thread guide (①), and then firmly pull the thread from the front and insert it into the slit of the thread guide disk marked "7" all the way (②).

Make sure that the thread passes the notch of the thread guide.

Technical diagram illustrating mechanical assembly steps with numbered components and directional arrows indicating motion

① Notch of the thread guide
② Thread guide disk

14 Cut the thread with the cutter on the left side of the machine.

Technical diagram showing a sewing machine's foot and arm mechanism with labeled parts and motion arrows

① Thread cutter

15 Lower the needle threader lever on the left side of the machine as much as possible to make the hook turn.

BABY LOCK Sofia BL137A - Memo - 5

natural_image Hand holding a small green object with a tool, showing a downward arrow (no text or symbols)

① Needle threader lever

Technical diagram showing mechanical assembly with labeled parts and a magnified detail view

① Needle

② Hook
BABY LOCK Sofia BL137A - Memo - 7

Note

- If the needle threader lever is not lowered as much as possible, the hook will not turn fully as shown below and the thread will not pass through the eye of the needle. In such a case, start from 13 again.

BABY LOCK Sofia BL137A - Note - 1

natural_image Diagram of a toilet with a green arrow indicating a motion or change, no text or symbols present

- If the needle is not raised, the needle threader cannot thread the needle. Be sure to press (Needle position button) to raise the needle before using the needle threader. For details, refer to step 3 of "Threading the upper thread" (page 32).

16 Raise the needle threader lever slowly.

Diagram showing a hand holding a small object with an arrow indicating upward motion, labeled with number ①.

① Needle threader lever

17 Raise the presser foot lever, and carefully pull the loop of the thread through the eye of the needle to pull out the end of the thread.

BABY LOCK Sofia BL137A - Note - 3

natural_image Technical line drawing of a sewing machine component with no visible text or symbols

BABY LOCK Sofia BL137A - Note - 4

CAUTION

  • Do not touch a button. Do not touch the start/stop button, needle position button or reverse/reinforcement stitch button. If one of the buttons is accidentally pressed, the machine will begin sewing and your finger may be pricked with the needle or the needle may break.
  • When pulling out the thread, do not pull it with extreme force, otherwise the needle may bend or break.

18 Pass the end of the thread through the presser foot, and then pull out about 5 cm (2 inches) of thread toward the rear of the machine.

Technical diagram of a sewing machine with labeled parts and measurement arrows

① 5cm (2 inches)
The upper threading is finished.

■Threading the needle manually (without using the needle threader)

When using specialty thread, such as transparent nylon thread or metallic thread, a wing needle or a twin needle which cannot be used with the needle threader, thread the needle as described below.

Thread the machine to the needle bar thread guide according to steps 1 through 11 on "Threading the upper thread" (page 32).

2 Lower the presser foot lever.

Technical diagram showing a mechanical or structural component with a green arrow indicating direction, labeled with number ①.

① Presser foot lever

③ Pass the thread through the eye of the needle from front to back.

BABY LOCK Sofia BL137A - ■Threading the needle manually (without using the needle threader) - 2

natural_image Line drawing of a sewing machine needle and handle assembly (no text or symbols)

! CAUTION

●Do not touch the start/stop button, needle position button or reverse/reinforcement stitch button. If one of the buttons is accidentally pressed, the machine will begin sewing and your finger may be pricked with the needle or the needle may break.

4 Raise the presser foot lever, pass the end of the thread through the opening in the presser foot, and pull out about 5 cm (2 inches) of thread toward the rear of the machine.

Using the twin needle

With the twin needle, you can sew two parallel lines of the same stitch with two different threads. Both upper threads should have the same thickness and quality. Be sure to use the twin needle and the extra spool pin.

For details on the stitches that can be sewn with the twin needle, refer to "Stitch Setting Chart" (page 70).

BABY LOCK Sofia BL137A - Using the twin needle - 1

natural_image Two simple line drawings of a tool or device with labeled parts (no text or symbols present)

① Twin needle ② Extra spool pin

BABY LOCK Sofia BL137A - Using the twin needle - 2

CAUTION

●The twin needle (part code: X59296-121) is recommended. Use of any other needle may bend the needle or damage the machine.
●Never use bent needles. Bent needles can easily break, possibly resulting in injuries.

1 Install the twin needle.

- For details on installing a needle, refer to "Replacing the needle" (page 41).

2 Thread the upper thread for the left needle eye.

For details, refer to steps 1 through 11 of "Threading the upper thread" (page 32).

3 Manually thread the left needle with the upper thread.

Pass the thread through the eye of the needle from the front.

BABY LOCK Sofia BL137A - CAUTION - 1

natural_image Diagram of a sewing machine needle with a green wire and thread (no text or labels)

CAUTION

●The needle threader cannot be used with the twin needle. If the needle threader is used with the twin needle, the sewing machine may be damaged.

4 Insert the extra spool pin into the end of the bobbin winder shaft, and install the thread spool on it. Then, thread the upper thread.

Diagram showing a mechanical setup with labeled parts and directional arrows indicating motion or force.

① Bobbin winder shaft
② Extra spool pin
③ Thread spool

BABY LOCK Sofia BL137A - CAUTION - 2

Memo

- When setting the thread spool, set it so that the thread winds off from the front of the spool.

5 Thread the upper thread for the right side in the same way that the upper thread for the left side was threaded.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Line drawing of a hand operating a sewing machine with a mechanical component (no text or symbols)

- For details, refer to steps 7 through 10 of "Threading the upper thread" (page 32).

6 Without passing the thread through the needle bar thread guide, manually thread the right needle.

Pass the thread through the eye of the needle from the front.

BABY LOCK Sofia BL137A - Memo - 2

natural_image Diagram of a medical or surgical instrument with a needle inserted into a support structure (no text or labels)

BABY LOCK Sofia BL137A - Memo - 3

CAUTION

●The needle threader cannot be used with the twin needle. If the needle threader is used with the twin needle, the sewing machine may be damaged.

7 Attach zigzag foot "J".

For details on changing the presser foot, refer to "Replacing the Presser Foot" (page 43).

BABY LOCK Sofia BL137A - CAUTION - 1

CAUTION

- When using the twin needle, be sure to attach zigzag foot "J". If bunched stitches occur, use presser foot "N" or use a lightweight tear-away stabilizer.

8 Turn on the sewing machine and select a stitch.

  • For stitch selection see "Selecting stitching" (page 49).
  • See "Stitch Setting Chart" (page 70) for stitches that use a twin needle.

BABY LOCK Sofia BL137A - CAUTION - 1

CAUTION

- When using the twin needle, be sure to select an appropriate stitch, otherwise the needle may break or the machine may be damaged.

BABY LOCK Sofia BL137A - CAUTION - 1

Press

BABY LOCK Sofia BL137A - CAUTION - 2

0.0 mm -- 2.5 mm

The screen for setting the twin needle appears.

BABY LOCK Sofia BL137A - CAUTION - 4

Press

BABY LOCK Sofia BL137A - CAUTION - 5

0.0 mm --- 2.5 mm +

BABY LOCK Sofia BL137A - CAUTION - 7

BABY LOCK Sofia BL137A - CAUTION - 8

plays in reverse highlight.

The twin needle can now be used.

BABY LOCK Sofia BL137A - CAUTION - 9

Memo

BABY LOCK Sofia BL137A - Memo - 1

BABY LOCK Sofia BL137A - Memo - 2

pressed again, it returns to

BABY LOCK Sofia BL137A - Memo - 3

BABY LOCK Sofia BL137A - Memo - 4

Press

BABY LOCK Sofia BL137A - Memo - 5

(Back

key).

BABY LOCK Sofia BL137A - Memo - 6

The initial screen appears again, and # appears.

W 0.0 mm -- 2.5 mm

BABY LOCK Sofia BL137A - Memo - 8

CAUTION

- When using the twin needle, be sure to select the twin needle setting, otherwise the needle may break or the machine may be damaged.

BABY LOCK Sofia BL137A - CAUTION - 1

Start sewing.

  • For details on starting to sew, refer to "Starting to sew" (page 51).
    ▶ Two lines of stitching are sewn parallel to each other.

BABY LOCK Sofia BL137A - Start sewing. - 1

natural_image Three abstract wavy line patterns in green, no text or symbols present

BABY LOCK Sofia BL137A - Start sewing. - 2

Note

- When changing the sewing direction, press ⏻ (Needle position button) to raise the needle from the fabric, and then raise the presser foot lever and turn the fabric.

BABY LOCK Sofia BL137A - Note - 1

CAUTION

- Do not try turning the fabric with twin needle in the down position, otherwise the needle may break or the machine may be damaged.

Replacing the Needle

This section describes how to replace the needle.

Needle precautions

BABY LOCK Sofia BL137A - Needle precautions - 1

CAUTION

  • Only use home sewing machine needles. Use of any other needle may bend the needle or damage the machine.
    ● Never use bent needles. Bent needles can easily break, possibly resulting in injuries.

Selecting the needle depending on the thread and fabric types

The sewing machine needle that should be used depends on the fabric and thread thickness. Refer to the following table when choosing the thread and needle appropriate for the fabric that you wish to sew.

Fabric Type/ApplicationThreadSize of Needle
Type Size
Medium weight fabricsBroadcloth Cotton thread60–9075/11–90/14
Taffeta Synthetic thread
Flannel, Gabardine Silk thread 50
Thin fabricsLawn Cotton thread60–9065/9–75/11
Georgette Synthetic thread
Challis, Satin Silk thread 50
Thick fabricsDenim Cotton thread30 100/16
5090/14–100/16
Corduroy Synthetic thread50–60
TweedSilk thread
Stretch fabricsJerseyThread for knits50–60Ball point needle(gold colored)75/11–90/14
Tricot
Easily frayed fabricsCotton thread50–9065/9–90/14
Synthetic thread
Silk thread 50
For top-stitchingSynthetic thread5090/14–100/16
Silk thread

BABY LOCK Sofia BL137A - Selecting the needle depending on the thread and fabric types - 1

Note

● Never use a thread weight of 130/20 or lower. It may cause malfunctions.

BABY LOCK Sofia BL137A - Note - 1

Memo

● The lower the thread number is, the thicker the thread, and the higher the needle number, the thicker the needle.

● A 75/11 needle is already installed when the sewing machine is purchased.

■Ball point needle (gold colored)

To avoid skipped stitches use ball point needles with stretch fabrics.

■Transparent nylon thread

Use a 90/14 to 100/16 needle, regardless of the fabric or thread.

■Embroidery needles

Use a 75/11 home sewing machine needle. When embroidering on thick fabrics such as denim, use a 90/14 or 100/16 home sewing machine needle.

BABY LOCK Sofia BL137A - ■Embroidery needles - 1

CAUTION

- The appropriate fabric, thread and needle combinations are shown in the table (page 39). If the combination of the fabric, thread and needle is not correct, particularly when sewing thick fabrics (such as denim) with fine needles (such as 65/9 to 75/11), the needle may bend or break. In addition, the stitching may be uneven or puckered or there may be skipped stitches.

Checking the needle

Sewing with a bent needle is extremely dangerous since the needle may break while the machine is being operated.

Before using the needle, place the flat side of the needle on a flat surface and check that the distance between the needle and the flat surface is even.

Diagram of a pen-like object with labeled parts ① and ②

① Flat side
② Needle type marking

BABY LOCK Sofia BL137A - Checking the needle - 2

CAUTION

- If the distance between the needle and the flat surface is not even, the needle is bent. Do not use a bent needle.

Diagram showing a hand holding a tool with a green circle above and a labeled component '①' below, indicating measurement or alignment.

Diagram showing a hand holding a tool with a cross mark and labeled step number ①, indicating a measurement or inspection.

① Flat surface

Replacing the needle

Use the screwdriver and a needle that has been determined to be straight according to the instructions in "Checking the needle" (page 40).

1 Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrows

① Needle position button

Turn off the sewing machine.

BABY LOCK Sofia BL137A - Replacing the needle - 2

CAUTION

- Before replacing the needle, be sure to turn off the sewing machine. Otherwise, injuries may occur if one of the operation buttons is accidentally pressed and the machine starts sewing.

3 Place fabric or paper under the presser foot and cover the holes on the needle plate.

Note

● Before replacing the needle, place fabric or paper under the presser foot to prevent the needle from falling into the holes in the needle plate.

4 Lower the presser foot lever.

Technical diagram showing a mechanical or structural component with labeled parts and an arrow indicating direction.

① Presser foot lever

5 Hold the needle with your left hand, and then use a screwdriver to turn the needle clamp screw toward you (counterclockwise) to remove the needle.

Diagram showing a hand holding a tool with labeled parts and directional arrows indicating movement or force.

① Screwdriver

② Needle clamp screw

- Do not apply a strong force when loosening or tightening the needle clamp screw, otherwise certain parts of the sewing machine may be damaged.

BABY LOCK Sofia BL137A - Note - 3

natural_image Diagram of a mechanical tool with a screw and shaft, showing motion direction (no text or symbols)

6 With the flat side of the needle toward the rear of the machine, insert the needle until it touches the needle stopper.

Diagram showing a hand using a sewing machine with an inset close-up highlighting the component's parts, including a green upward arrow indicating force or direction.

① Needle stopper

7 While holding the needle with your left hand, use the screwdriver to tighten the needle clamp screw.

BABY LOCK Sofia BL137A - Note - 5

natural_image Hand holding a tool with a green circular arrow indicating rotation (no text or symbols)

Install the twin needle in the same way.

BABY LOCK Sofia BL137A - Note - 6

natural_image Hand holding a mechanical tool with a green arrow indicating rotation (no text or symbols)

! CAUTION

- Be sure to insert the needle until it touches the needle stopper and securely tighten the needle clamp screw with the screwdriver. Otherwise, the needle may break or damage may result.

Replacing the Presser Foot

This section describes how to replace the presser foot.

Presser foot precautions

Be sure to observe the following precautions concerning the presser foot.

BABY LOCK Sofia BL137A - Presser foot precautions - 1

CAUTION

  • Use the presser foot appropriate for the type of stitch that you wish to sew, otherwise the needle may hit the presser foot, causing the needle to bend or break.
  • Only use presser feet designed specifically for this sewing machine. Use of any other presser foot may result in injuries or damage to the machine.

Replacing the presser foot

Replace the presser foot as described below.

BABY LOCK Sofia BL137A - Replacing the presser foot - 1

Memo

  • For details on attaching the embroidery foot "Q", refer to "Attaching the Embroidery Foot" (page 120).
  • Zigzag foot "J" is already installed when the sewing machine is purchased.

1 Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or fluidic component with labeled parts and numbered marker ①

① Needle position button

2 Turn off the sewing machine.

BABY LOCK Sofia BL137A - Turn off the sewing machine. - 1

BABY LOCK Sofia BL137A - Turn off the sewing machine. - 2

CAUTION

  • Before replacing the presser foot, be sure to turn off the sewing machine.
    Otherwise, injuries may occur if one of the operation buttons is accidentally pressed and the machine starts sewing.

3 Raise the presser foot lever.

Technical diagram showing a mechanical or fluid system with labeled components and directional arrow

① Presser foot lever
The presser foot is raised.

4 Press the black button at the back of the presser foot holder.

Diagram showing two mechanical assembly steps with labeled arrows indicating motion direction

① Black button
② Presser foot holder

The presser foot holder releases the presser foot.

BABY LOCK Sofia BL137A - Press the black button at the back of the presser foot holder. - 2

Place a different presser foot below the holder so that the presser foot pin is aligned with the notch in the holder.

Position the presser foot so the letter indicating the presser foot type (A, G, I, J, M, N or R) is positioned to be read.

Technical diagram of a sewing machine with numbered parts labeled ①, ②, and ③

① Presser foot holder
② Notch
③ Pin

BABY LOCK Sofia BL137A - Press the black button at the back of the presser foot holder. - 4

Slowly lower the presser foot lever so that the presser foot pin snaps into the notch in the presser foot holder.

Diagram illustrating four-step assembly of a mechanical component with labeled parts and directional arrows indicating motion.

① Presser foot lever
② Presser foot holder
③ Notch
④ Pin

The presser foot is attached.

BABY LOCK Sofia BL137A - Press the black button at the back of the presser foot holder. - 6

Raise the presser foot lever to check that the presser foot is securely attached.

BABY LOCK Sofia BL137A - Press the black button at the back of the presser foot holder. - 7

natural_image Technical line drawing of a sewing machine (no text or symbols)

BABY LOCK Sofia BL137A - Press the black button at the back of the presser foot holder. - 8

Note

- When a stitch is selected, the icon for the presser foot that should be used appears in the screen. Check that the correct presser foot is attached before starting to sew. If the wrong presser foot is installed, turn off the sewing machine, attach the correct presser foot, and then select the desired stitch again.

JP + 8 1/67 W 0.0 mm -- 2.5 mm

BABY LOCK Sofia BL137A - Note - 2

Buttonhole foot "A"

BABY LOCK Sofia BL137A - Note - 3

Overcasting foot "G"

BABY LOCK Sofia BL137A - Note - 4

Zigzag foot "J"

BABY LOCK Sofia BL137A - Note - 5

Button fitting foot "M"

BABY LOCK Sofia BL137A - Note - 6

Monogramming foot "N"

BABY LOCK Sofia BL137A - Note - 7

Blind stitch foot "R"

BABY LOCK Sofia BL137A - Note - 8

Side cutter "S" (option)

- For details on the presser foot that should be used with the selected stitch, refer to "Stitch Setting Chart" (page 70).

Removing and attaching the presser foot holder

Remove the presser foot holder when cleaning the sewing machine or when installing a presser foot that does not use the presser foot holder, such as the embroidery foot, optional free-motion open toe quilting foot "O" and optional walking foot. Use the screwdriver to remove the presser foot holder.

BABY LOCK Sofia BL137A - Removing and attaching the presser foot holder - 1

CAUTION

- Before attaching/removing the presser foot, be sure to turn off the sewing machine. Otherwise, injuries may occur if one of the operation buttons is accidentally pressed and the machine starts sewing.

BABY LOCK Sofia BL137A - CAUTION - 1

Remove the presser foot.

- For details, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Remove the presser foot. - 1

Use the screwdriver to loosen the presser foot holder screw.

Technical diagram of a mechanical device with numbered components and a green rotation arrow indicating motion

① Screwdriver
② Presser foot holder
③ Presser foot holder screw
④ Presser bar

The presser foot is removed from the presser bar.

■Attaching the presser foot holder

BABY LOCK Sofia BL137A - Remove the presser foot. - 3

Raise the presser foot lever.

The presser foot is raised.

BABY LOCK Sofia BL137A - Remove the presser foot. - 4

Align the presser foot holder with the lower-left side of the presser bar.

Technical diagram showing mechanical assembly with labeled parts and directional arrow indicating motion or force

① Presser bar
② Presser foot holder

BABY LOCK Sofia BL137A - Remove the presser foot. - 6

Hold the presser foot holder in place with your right hand, and then tighten the screw using the screwdriver in your left hand.

Technical diagram showing a mechanical assembly with labeled parts, including a tool and a handle mechanism.

① Screwdriver
② Presser foot holder

BABY LOCK Sofia BL137A - Remove the presser foot. - 8

CAUTION

  • Do not hit the needle with your finger or the presser foot when attaching/removing it. The needle may break or cause injury.
  • Be sure to tighten the screw with the included screwdriver. If the screw is loose, the needle may hit the presser foot and break or bend.

Sewing Cylindrical Pieces

Free-arm sewing makes sewing cylindrical pieces easy.

Free-arm sewing

Removing the flat bed attachment allows for free-arm sewing, making it easier to sew cylindrical pieces such as sleeve cuffs and pant legs.

1 Remove the flat bed attachment.

BABY LOCK Sofia BL137A - Remove the flat bed attachment. - 1

natural_image Diagram of a device's internal structure showing a green component and a blue housing, with a green arrow indicating direction (no text or symbols present)

① Flat bed attachment

With the flat bed attachment removed, free-arm sewing is possible.

2 Slide the part that you wish to sew onto the arm, and then sew from the top.

BABY LOCK Sofia BL137A - Slide the part that you wish to sew onto the arm, and then sew from the top. - 1

natural_image Technical diagram of a belt buckle assembly with no visible text or symbols

① Arm

3 When you have finished free-arm sewing, reconnect the flat bed attachment.

BABY LOCK Sofia BL137A - When you have finished free-arm sewing, reconnect the flat bed attachment. - 1

natural_image Diagram of a device's internal structure with a green component and an arrow indicating direction (no text or symbols)

2 SEWING BASICS

The necessary preparations for sewing are described in this chapter.

Sewing....48

Setting the Stitch ....57

Useful Functions....61

Useful Sewing Tips 65

Sewing

Basic sewing operations are described below.

Before operating the sewing machine, read the following precautions.

BABY LOCK Sofia BL137A - Sewing - 1

CAUTION

  • While the machine is in operation, pay special attention to the needle location. In addition, keep your hands away from all moving parts such as the needle and handwheel, otherwise injuries may occur.
  • Do not pull or push the fabric too hard while sewing, otherwise injuries may occur or the needle may break.
    ● Never use bent needles. Bent needles can easily break, possibly resulting in injuries.
    ● Make sure that the needle does not strike basting pins, otherwise the needle may break or bend.

General sewing procedure

Follow the basic procedures below to sew.

1 Attach the presser foot.Attach the presser foot that is appropriate for the type of stitch that you wish to sew. Be sure to turn off the main power before replacing the presser foot.For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).
2 Turn on the machine.Turn on the sewing machine. For details on turning on the machine, refer to "Turning on the machine" (page 17).
3 Select the stitch.Select the stitch appropriate for the area to be sewn.For details on selecting a stitch, refer to "Selecting stitching" (page 49).
4 Position the fabric.Place the area to be sewn under the presser foot. Be sure that the fabric pieces are sewn in the correct order and that the right and wrong sides of the fabric are aligned correctly. For details on positioning the fabric, refer to "Positioning the fabric" (page 50).
5 Start sewing.Start sewing.For details on starting to sew, refer to "Starting to sew" (page 51).
6 Cut the thread.Cut the thread at the end of sewing. Automatic thread cutting is also possible. For details on cutting the thread, refer to "Cutting the thread" (page 55).

Selecting stitching

Stitches are selected using LCD operations. Turn the power on, the utility stitch selecting screen appears and the straight stitch (left needle position) is selected.

• Refer to "Stitch Setting Chart" (page 70).

2 Attach the presser foot. The machine comes with zigzag foot "J" attached.

- For details, refer to "Replacing the presser foot" (page 43).

CAUTION

- Use the presser foot appropriate for selected stitch. If the wrong presser foot is used, the needle may hit the presser foot and bend or break.

3 Turn on the sewing machine.

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 1

- When an animation is displayed on the screen, touch the LCD with your finger.

The straight stitch (left needle position) is shown selected on the screen.

W 0.0 mm -- 2.5 mm

4 Select a stitch.

(Previous page key) displays the previous page, and (Next page key) displays the next page.

0.0 mm -- 2.5 mm

Memo

- When touching the screen with your finger is difficult, use the included touch pen.

Example: When ^11 is selected:

GIF 11/67 W--- W 3.5 mm -- 2.0 mm

The number of selected stitch, the stitch width and the stitch length are displayed.

5 If necessary, specify the settings for automatic reverse/reinforcement stitching and adjust the stitch length, etc.

- For details on sewing with each of the utility stitches, refer to Chapter 3, "UTILITY STITCHES" which begins from page 70.

Note

- When a stitch is selected, the icon for the presser foot that should be used appears on the screen. Check that the correct presser foot is attached before starting to sew. If the wrong presser foot is installed, turn off the sewing machine, attach the correct presser foot, and then select the desired stitch again.

Memo

- For details on setting automatic reverse/reinforcement stitching etc., refer to "Useful Functions" (page 61).

- For details on adjusting the stitch width, stitch length and thread tension, refer to "Setting the Stitch" (page 57).

Positioning the fabric

Be sure that the fabric pieces are sewn in the correct order and that the right and wrong sides of the fabric are aligned correctly.

1 Turn on the machine.

BABY LOCK Sofia BL137A - Turn on the machine. - 1

2 Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or fluidic component with labeled parts and numbered marker ①

① Needle position button

3 Place the fabric under the presser foot.

BABY LOCK Sofia BL137A - Place the fabric under the presser foot. - 1

Memo

- If the seam allowance is positioned on the right side, sewing in a straight line is easier and the extra fabric does not get in the way.

4 While holding the end of the thread and the fabric with your left hand, turn the handwheel toward you (counterclockwise) with your right hand to lower the needle to the starting point of the stitching.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Illustration of a sewing machine being adjusted for a component, showing step-by-step assembly (no text or symbols)

5 Lower the presser foot lever.

Technical diagram showing a mechanical or structural component with labeled parts and an arrow indicating direction.

① Presser foot lever
The fabric is now positioned to be sewn.

BABY LOCK Sofia BL137A - Lower the presser foot lever. - 2

natural_image Technical line drawing of a mechanical assembly with no visible text or symbols

Starting to sew

Once you are ready to start sewing, you can start the sewing machine. Sewing can be started and stopped using the operation button (Start/stop button) or the foot controller. For details on the foot controller, refer to next page.

BABY LOCK Sofia BL137A - Starting to sew - 1

Memo

- When the foot controller is plugged in, (Start stop button) cannot be used to start sewing.

■Using the operation button

Sewing can be started and stopped using the operation button (Start/stop button).

BABY LOCK Sofia BL137A - ■Using the operation button - 1

Slide the sewing speed controller to the left or right to select the desired sewing speed.

Slide the sewing speed controller to the left to sew at a slower speed, or slide the speed controller to the right to sew at a faster speed.

Diagram showing a mechanical or fluid system with directional arrows and labeled component ①

① Sewing speed controller

BABY LOCK Sofia BL137A - ■Using the operation button - 3

Press (Start/stop button) once.

BABY LOCK Sofia BL137A - ■Using the operation button - 4

natural_image Pure mechanical diagram showing a lever and guide mechanism without any text or symbols

① Start/stop button
The machine starts sewing.

BABY LOCK Sofia BL137A - ■Using the operation button - 5

natural_image Mechanical assembly diagram showing a sewing machine with no visible text or symbols

BABY LOCK Sofia BL137A - ■Using the operation button - 6

Memo

● The machine will sew at a slow speed at the beginning of sewing.
- If you press and hold the Start/stop button) while sewing, the machine will sew at a slow speed. If you use this function at the point just before the position where you want to stop the machine, you can stop the machine with more precision.

BABY LOCK Sofia BL137A - Memo - 1

When the end of the stitching is reached, press 📂/💡 (Start/stop button) once.

The machine stops sewing with the needle lowered (in the fabric).

BABY LOCK Sofia BL137A - Memo - 2

Cut the threads.

- For details, refer to "Cutting the thread" (page 55).

BABY LOCK Sofia BL137A - Cut the threads. - 1

Note

- This machine will automatically stop when the bobbin becomes almost empty. When the machine stops, replace the bobbin thread, and then press START / ↑ (Start/stop button) to begin sewing again.

■Using the foot controller

Sewing can be started and stopped using the foot controller.

BABY LOCK Sofia BL137A - ■Using the foot controller - 1

natural_image Line drawing of a portable electronic device with a coiled cable (no text or symbols)

① Turn off the sewing machine.

BABY LOCK Sofia BL137A - ① Turn off the sewing machine. - 1

BABY LOCK Sofia BL137A - ① Turn off the sewing machine. - 2

Note

- When connecting the foot controller, be sure to turn off the sewing machine in order to prevent the machine from accidentally being started.

② Insert the foot controller plug into its jack on the right side of the sewing machine.

Diagram showing a device with a foot switch connected to a slide, labeled with number ①

① Foot controller jack

BABY LOCK Sofia BL137A - ② Insert the foot controller plug into its jack on the right side of the sewing machine. - 2

Memo

(For U.S.A. only)

● Foot controller: Model T This foot controller can be used on this machine model BL137A.

3 Turn on the machine.

BABY LOCK Sofia BL137A - Turn on the machine. - 1

④ Slide the sewing speed controller to the left or right to select the desired sewing speed.

Slide the sewing speed controller to the left to sew at a slower speed, or slide the speed controller to the right to sew at a faster speed.

Diagram showing a mechanical or fluid system with directional arrows and labeled components, including a highlighted oval and a numbered marker.

① Sewing speed controller

The speed set using the sewing speed controller is the foot controller's maximum sewing speed.

⑤ Once you are ready to start sewing, slowly press down on the foot controller.

Pressing down on the foot controller increases the sewing speed; releasing the pressure on the foot controller decreases the sewing speed.

Slower Faster

- Slowly press down on the foot controller. Pressing it down hard starts sewing too quickly.

The machine starts sewing.

⑥ When the end of the stitching is reached, completely release the foot controller.

The machine stops sewing with the needle lowered (in the fabric).

⑦ Cut the threads. • For details, ref

- For details, refer to "Cutting the thread" (page 55).

BABY LOCK Sofia BL137A - ⑦ Cut the threads. • For details, ref - 1

Memo

  • When the foot controller is plugged in, START/↑ (Start/stop button) cannot be used to start sewing.
  • When sewing is stopped, the needle remains lowered (in the fabric). The machine can be set so that the needle will stay up when sewing is stopped. For details on setting the machine so that the needle stays up when sewing is stopped, refer to "Changing the machine settings" (page 19).

BABY LOCK Sofia BL137A - Memo - 1

CAUTION

  • Do not allow thread or dust to accumulate in the foot controller, otherwise a fire or an electric shock may occur.
  • Do not place objects on the foot controller, otherwise damage to the machine or injuries may occur.
  • If the machine is not to be used for a long period of time, unplug the foot controller, otherwise a fire or an electric shock may occur.

Securing the stitching

When sewing with the straight stitch, for example, at the end of an opening or where seams do not overlap, use reverse stitching or reinforcement stitching to secure the end of the thread.

BABY LOCK Sofia BL137A - Securing the stitching - 1

Lower the needle into the fabric at the beginning of the stitching, then lower the presser foot.

BABY LOCK Sofia BL137A - Securing the stitching - 2

natural_image Illustration of a sewing machine needle stitching fabric, with no visible text or symbols

BABY LOCK Sofia BL137A - Securing the stitching - 3

Press (Start/stop button), or press down on the foot controller.

At this time, if (start/stop button) is held down, the machine sews at a slow speed.

- For details, refer to "Starting to sew" (page 51).

Technical diagram showing a mechanical component with labeled parts and a numbered annotation pointing to a specific feature.

① Start/stop button
The machine starts sewing.

BABY LOCK Sofia BL137A - Securing the stitching - 5

After sewing 3 to 5 stitches, press ⏻ (Reverse/reinforcement stitch button).

Keep ⏻ (Reverse/reinforcement stitch button) held down until you reach the beginning of the stitching.

- The machine sews at a slow speed when (Reverse/reinforcement stitch button) is held down.

Technical diagram showing a mechanical or electrical component with labeled parts and an arrow pointing to a highlighted section.

① Reverse/reinforcement stitch button

While Reverse/reinforcement stitch button) is held down, reverse stitches are sewn.

BABY LOCK Sofia BL137A - After sewing 3 to 5 stitches, press ⏻ (Reverse/reinforcement stitch button). - 2

After sewing back to the beginning of the stitching, release (Reverse/reinforcement stitch button).

The machine stops sewing.

BABY LOCK Sofia BL137A - After sewing back to the beginning of the stitching, release (Reverse/reinforcement stitch button). - 1

Press (Start/stop button), or press down on the foot controller.

The machine starts sewing in the normal sewing direction.

BABY LOCK Sofia BL137A - Press (Start/stop button), or press down on the foot controller. - 1

natural_image Technical line drawing of a sewing machine mechanism (no text or symbols)

BABY LOCK Sofia BL137A - Press (Start/stop button), or press down on the foot controller. - 2

When the end of the stitching is reached, press ⏻ (Reverse/reinforcement stitch button).

Keep ⏻ (Reverse/reinforcement stitch button) held down until 3 to 5 reverse stitches are sewn.

While (Reverse/reinforcement stitch button) is held down, reverse stitches are sewn.

BABY LOCK Sofia BL137A - When the end of the stitching is reached, press ⏻ (Reverse/reinforcement stitch button). - 1

natural_image Technical line drawing of a sewing machine needle and base (no text or symbols)

BABY LOCK Sofia BL137A - When the end of the stitching is reached, press ⏻ (Reverse/reinforcement stitch button). - 2

After 3 to 5 reverse stitches have been sewn, release (Reverse/reinforcement stitch button).

The machine stops sewing.

BABY LOCK Sofia BL137A - After 3 to 5 reverse stitches have been sewn, release (Reverse/reinforcement stitch button). - 1

Press (Start/stop button), or press down on the foot controller.

At this time, if (Start/stop button) is held down, the machine sews at a slow speed.

The machine starts sewing in the normal sewing direction.

BABY LOCK Sofia BL137A - Press (Start/stop button), or press down on the foot controller. - 1

After sewing to the end of the stitching, the sewing machine stops.

Release (Start/stop button) or foot controller.

BABY LOCK Sofia BL137A - After sewing to the end of the stitching, the sewing machine stops. - 1

flowchart
graph TD
    A["①"] --> B["②"]
    B --> C["③ Press / ↑"]
    A --> D["④ Press"]
    D --> E["⑤ Press / ↑"]
    A --> F["⑥ Press / ↑"]
    B --> G["⑦ Press / ↑"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#ffc,stroke:#333
    style F fill:#cff,stroke:#333
    style G fill:#ffc,stroke:#333

① Beginning of stitching ② End of stitching

■Sewing stitches

When ⏻ (Reverse/reinforcement stitch button) is

pressed with stitches other than 1, 3 and

7 stitches, reinforcement stitches are used.

Reinforcement stitches are 3 to 5 stitches sewn on top of each other in one place.

BABY LOCK Sofia BL137A - ■Sewing stitches - 1

natural_image Two identical zigzag lines labeled ① and ②, no additional text or symbols present.

① Reverse stitching
② Reinforcement stitching

BABY LOCK Sofia BL137A - ■Sewing stitches - 2

Memo

- The sewing machine can be set to automatically sew reverse or reinforcement stitches at the beginning and end of the stitching. For details, refer to "Automatic sewing reverse/reinforcement stitches" (page 61).

Cutting the thread

When you have finished sewing, cut the thread.

■Using the thread cutter button

① When you wish to finish the stitching, press Ⓧ(Thread cutter button) once.

Technical diagram showing a mechanical or electrical component with labeled parts and an arrow pointing to a numbered point.

① Thread cutter button

The threads are cut and the needle is raised.

BABY LOCK Sofia BL137A - ■Using the thread cutter button - 2

Note

● The thread cutter button cannot be used when the presser foot lever is raised.

2 Raise the presser foot lever, then remove the fabric.

Diagram showing fluid flow through a channel with labeled components and directional arrow

① Presser foot lever

BABY LOCK Sofia BL137A - Note - 2

CAUTION

  • Do not press (Thread cutter button) after threads have already been cut, otherwise the needle may break, the threads may become tangled or damage to the machine may occur.
  • Do not press (Thread cutter button) if there is no fabric under the presser foot or while the machine is sewing, otherwise damage to the machine may occur.

BABY LOCK Sofia BL137A - CAUTION - 1

Memo

- The machine can be set so that the thread will be cut automatically when sewing is finished. For details, refer to "Automatically cutting the thread" (page 62).

■Using the thread cutter

When sewing with nylon or metallic threads, or other special threads, use the thread cutter on the side of the machine to cut the threads.

① When you wish to finish the stitching and the sewing machine is stopped, press (Needle position button) once to raise the needle.

Technical diagram showing a mechanical assembly with labeled components and a numbered marker '①'

① Needle position button

2 Raise the presser foot lever.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrow

① Presser foot lever

3 Pull the fabric to the left side of the machine, and then pass the threads through the thread cutter to cut them.

Technical diagram showing sewing process with labeled component ① and directional arrow indicating rotation

① Thread cutter

Setting the Stitch

This machine is preset with the default settings for the stitch width and stitch length for each stitch. However, you can change any of the settings by pressing in the screen, then follow the procedure described in this section.

J12 + 8 1/67 W--- W 0.0 mm -- 2.5 mm

BABY LOCK Sofia BL137A - Setting the Stitch - 2

Note

● Settings for some stitches cannot be changed. For details, refer to "Stitch Setting Chart" (page 70).
- Stitch settings return to their defaults if they are changed, when the machine is turned off or a different stitch is selected before the stitch setting is saved. If you want to save settings, refer to "Saving stitch settings" (page 64).

Adjusting the stitch width

The stitch width (zigzag width) can be adjusted to make the stitch wider or narrower.

JG RESET MEMORY ~3.5 mm --1.4 mm - + - +

Each press of makes the zigzag stitch narrower.

BABY LOCK Sofia BL137A - Adjusting the stitch width - 2

natural_image Diagram showing two green zigzag lines merging into a single green zigzag line with an arrow indicating direction (no text or symbols)

Each press of makes the zigzag stitch wider.

BABY LOCK Sofia BL137A - Adjusting the stitch width - 3

natural_image Diagram showing two green zigzag lines merging into a single teal line with an arrow indicating direction (no text or symbols)

BABY LOCK Sofia BL137A - Adjusting the stitch width - 4

Memo

● - - ans the setting cannot be adjusted.
- If the straight stitch (left needle position or triple stretch stitch) was selected, changing the stitch width changes the needle position. Increasing the width moves the needle to the right; reducing the width moves the needle to the left. For details, refer to "Changing the needle position" (page 79).
- Press to return the setting to its default.
- If the foot controller is connected, the sewing speed controller can be used to adjust the zigzag width. For details, refer to "Adjusting stitch width using the sewing speed controller" (page 58).

BABY LOCK Sofia BL137A - Memo - 1

CAUTION

- After adjusting the stitch width, slowly turn the handwheel toward you (counterclockwise) and check that the needle does not touch the presser foot. If the needle hits the presser foot, the needle may bend or break.

■Adjusting stitch width using the sewing speed controller

A decorative stitch can be sewn by changing the stitch width. If the sewing machine is set so that the stitch width can be adjusted using the sewing speed controller, the stitch width can quickly and easily be adjusted. In this case, the sewing speed is adjusted with the foot controller.

Connect the foot controller.

- For details, refer to "Using the foot controller" (page 52).

2 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Attach zigzag foot "J". - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

3 Turn on the sewing machine, and then press (Settings key) on the operation panel.

User interface toolbar with navigation buttons and icons, one highlighted in green

The setting screen appears.

Press "ON" for stitch width control setting.

NEEDLE POSITION WIDTH CONTROL ON OFF

The machine is now set so that the stitch width can be controlled with the sewing speed controller.

BABY LOCK Sofia BL137A - Press "ON" for stitch width control setting. - 2

Memo

- If the stitch width control setting is set to "ON", for stitch width will change to sewing speed controller icon

2.5 mm ---1.4 mm

5 Press (Back key).

NEEDLE POSITION WIDTH CONTROL ON OFF

The initial screen appears again.

6 Select a stitch.

JG W 3.5 mm -- 1.4 mm

- For details, refer to "Selecting stitching" (page 49).

⑦ While sewing, slide the sewing speed controller to adjust the stitch width.

Slide the controller to the left to make the width narrower. Slide the controller to the right to make the width wider.

Narrower Wider

- Adjust the sewing speed with the foot controller.

⑧ When you have finished sewing, set the stitch width control setting back to "OFF".

Memo

- Although the stitching result differs depending on the type of fabric being sewn and the thickness of the thread being used, for best results, adjust the stitch length to between 0.3 and 0.5 mm (1/64 and 1/32 inch).

Adjusting the stitch length

The stitch length can be adjusted to make the stitch coarser or finer.

JIP + + W V RESET MEM- ORY 0.0 mm -2.5 mm - + - +

Each press of makes the stitch finer (shorter).

BABY LOCK Sofia BL137A - Adjusting the stitch length - 2

natural_image Simple black arrow pointing right inside a dashed rectangular border (no text or symbols)

Each press of makes the stitch coarser (longer).

BABY LOCK Sofia BL137A - Adjusting the stitch length - 3

natural_image Simple black arrow pointing right inside a dashed rectangular border (no text or symbols)

BABY LOCK Sofia BL137A - Adjusting the stitch length - 4

Memo

● - means the setting cannot be adjusted.
- Press to return the setting to its default.

BABY LOCK Sofia BL137A - Memo - 1

CAUTION

- If the stitches are bunched together, increase the stitch length. Continuing to sew with the stitches bunched together may result in the needle bending or breaking.

Adjusting the thread tension

You may need to change the thread tension, depending on the fabric and thread being used.

■Correct thread tension

The upper thread and the bobbin thread should cross near the center of the fabric. Only the upper thread should be visible from the right side of the fabric, and only the bobbin thread should be visible from the wrong side of the fabric.

Diagram of a layered electronic device with numbered components, likely an integrated circuit or package.

① Wrong side of fabric
② Right side of fabric
③ Upper thread
④ Bobbin thread

■Upper thread is too tight

If the bobbin thread is visible from the right side of the fabric, the upper thread is too tight.

BABY LOCK Sofia BL137A - ■Upper thread is too tight - 1

Note

- If the bobbin thread was incorrectly threaded, the upper thread may be too tight. In this case, refer to "Installing the bobbin" (page 27) and rethread the bobbin thread.

Technical diagram of a layered electronic device with numbered components and internal wiring

① Wrong side of fabric
② Right side of fabric
③ Upper thread
④ Bobbin thread
⑤ The bobbin thread is visible from the right side of the fabric.

Turn the thread tension dial to the left to loosen the upper thread.

BABY LOCK Sofia BL137A - Note - 2

BABY LOCK Sofia BL137A - Note - 3

Memo

- When you finish sewing, remove the bobbin cover and then make sure that the thread is shown as below. If the thread is not shown as below, the thread is not inserted through the tension-adjusting spring of the bobbin case correctly. Reinsert the thread correctly. For details, refer to page 29.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Line drawing of a sewing machine needle stitching on a workbench, with an inset close-up showing the detail (no text or symbols)

■Upper thread is too loose

If the upper thread is visible from the wrong side of the fabric, the upper thread is too loose.

BABY LOCK Sofia BL137A - ■Upper thread is too loose - 1

Note

- If the upper thread was incorrectly threaded, the upper thread may be too loose. In this case, refer to "Threading the upper thread" (page 32) and rethread the upper thread.

Technical diagram of a layered electronic component with numbered parts labeled ① to ⑤

① Wrong side of fabric
② Right side of fabric
③ Upper thread
④ Bobbin thread
⑤ The upper thread is visible from the wrong side of the fabric.

Turn the thread tension dial to the right to tighten the upper thread.

BABY LOCK Sofia BL137A - Note - 2

BABY LOCK Sofia BL137A - Note - 3

Memo

  • If the upper thread is not threaded correctly or the bobbin is not installed correctly, it may not be possible to set the correct thread tension. If the correct thread tension cannot be achieved, rethread the upper thread and insert the bobbin correctly.
  • The level "4" on the tension dial is a guide for working normal fabrics (medium weight). However, the actual stitch tension you'll want to use will vary according to the fabric and thread you are using, so you should always sew a stitch sample and adjust stitch tension before beginning on the actual piece to be worked.
    ● The machine may stop sewing if tension is set extremely low. This is not a sign that there is anything wrong with your machine. Simply adjust to the correct stitch tension and begin again.

Useful Functions

Functions useful in improving sewing efficiency are described below.

Automatic sewing reverse/reinforcement stitches

The sewing machine can be set to automatically sew reverse or reinforcement stitches at the beginning and end of the stitching. Depending on the selected stitch, reverse stitches or reinforcement stitches are automatically set. For details on reverse/reinforcement stitching, refer to "Stitch Setting Chart" (page 70).

1 Turn on the machine.

BABY LOCK Sofia BL137A - Turn on the machine. - 1

The LCD comes on.

2 Select a stitch. • For details or

- For details on selecting a stitch, refer to "Selecting stitching" (page 49).

3 Press on the LCD.

JBG + 8 1/67 W--- W 0.0 mm -- 2.5 mm

It turns to and the sewing machine is set for automatic reverse/reinforcement stitching.

JG + f 8 1/67 W--- W 0.0 mm --- 2.5 mm

Memo

● To turn automatic reverse/reinforcement stitching off, press
- When the sewing machine is turned off, the automatic reverse/reinforcement stitching setting is cancelled.
- When the stitch such as those for sewing buttonholes and bar tacks is selected, reinforcement stitches are automatically sewn.

4 Position the fabric under the presser foot, and then press Start/stop button) once.

BABY LOCK Sofia BL137A - Position the fabric under the presser foot, and then press Start/stop button) once. - 1

natural_image Pure mechanical diagram showing a lever and component without any text, numbers, or symbols

① Start/stop button

▶ Stitching starts after reverse stitching or reinforcement stitching.

5 After reaching the end of the stitching, press (Reverse/reinforcement stitch button) once. Buttonholes or bar tacking require reinforcement stitching making this operation unnecessary.

Technical diagram showing a mechanical or electronic component with labeled parts and an arrow pointing to a highlighted section.

① Reverse/reinforcement stitch button

After reverse/reinforcement stitches are sewn, the sewing machine stops.

Diagram showing a vertical dashed line with directional arrows and symbols, possibly indicating a flow or direction.

BABY LOCK Sofia BL137A - After reaching the end of the stitching, press (Reverse/reinforcement stitch button) once. Buttonholes or bar tacking require reinforcement stitching making this operation unnecessary. - 3

Memo

- Press (Start/stop button) when you want to stop the sewing machine in the middle of sewing without reverse stitching or reinforcement stitching (for example, when you want to change the sewing direction). The sewing machine stops without reverse stitching or reinforcement stitching. Press (Reverse/reinforcement stitch button) at the end of the stitching.

BABY LOCK Sofia BL137A - Memo - 1

flowchart
graph TD
    A["Start"] --> B["Step 1"]
    B --> C["Step 2"]
    C --> D["Step 3"]
    D --> E["Step 4"]
    style A fill:#fff,stroke:#000
    style B fill:#fff,stroke:#000
    style C fill:#fff,stroke:#000
    style D fill:#fff,stroke:#000
    style E fill:#fff,stroke:#000

① Stop the machine and change the sewing direction.

② Start the machine again.

Automatically cutting the thread

The sewing machine can be set to automatically cut the threads at the end of the stitching. This is called "programmed thread-cutting".

If programmed thread-cutting is set, automatic reverse/reinforcement stitching is also set.

BABY LOCK Sofia BL137A - Automatically cutting the thread - 1

Turn on the machine.

BABY LOCK Sofia BL137A - Turn on the machine. - 1

The LCD comes on.

BABY LOCK Sofia BL137A - Turn on the machine. - 2

Press the stitch selection.

- For details on selecting a stitch, refer to "Selecting stitching" (page 49).

BABY LOCK Sofia BL137A - Press the stitch selection. - 1

Press the screen.

JG + 8 1/67 W 0.0 mm - 2.5 mm

You get in the sewing machine is set for programmed thread-cutting and automatic reverse/reinforcement stitching.

JG + 8 1/67 W--- W 0.0 mm --- 2.5 mm

BABY LOCK Sofia BL137A - Press the screen. - 3

Memo

● To turn programmed thread cutting off, press

BABY LOCK Sofia BL137A - Memo - 1

Position the fabric under the presser foot, and then press (Start/stop button) once.

BABY LOCK Sofia BL137A - Position the fabric under the presser foot, and then press (Start/stop button) once. - 1

natural_image Pure mechanical diagram showing a lever and guide mechanism without any text or symbols

① Start/stop button

Stitching starts after reverse stitching or reinforcement stitching.

BABY LOCK Sofia BL137A - Position the fabric under the presser foot, and then press (Start/stop button) once. - 2

After reaching the end of the stitching, press ⏻(Reverse/reinforcement stitch button) once.

Buttonholes or bar tacking require reinforcement stitching making this operation unnecessary.

After the reverse stitching or reinforcement stitching has been done, the sewing machine stops, and the thread is cut.

KUMT /! The thread is cut here.

BABY LOCK Sofia BL137A - After reaching the end of the stitching, press ⏻(Reverse/reinforcement stitch button) once. - 2

Memo

- Press (Start/stop button) when you want to stop the sewing machine in the middle of sewing without programmed thread-cutting (for example, when you want to change the sewing direction). The sewing machine stops without programmed thread cutting.

Press (Reverse/reinforcement stitch button) at the end of the stitching.

BABY LOCK Sofia BL137A - Memo - 1

flowchart
graph TD
    A["Start"] --> B["1"]
    B --> C["2①"]
    C --> D["3②"]
    D --> E["4③"]
    E --> F["↑"]
    style A fill:#fff,stroke:#000
    style B fill:#fff,stroke:#000
    style C fill:#fff,stroke:#000
    style D fill:#fff,stroke:#000
    style E fill:#fff,stroke:#000
    style F fill:#fff,stroke:#000

① Stop the machine and change the sewing direction.
② Start the machine again.
③ The thread is cut here.

- If the power is turned off, programmed thread-cutting will be turned off.

Mirroring stitches

You can sew the mirror image of a stitch horizontally (left and right).

BABY LOCK Sofia BL137A - Mirroring stitches - 1

Turn on the machine.

BABY LOCK Sofia BL137A - Turn on the machine. - 1

The LCD comes on.

BABY LOCK Sofia BL137A - Turn on the machine. - 2

Select a stitch.

- For details on selecting a stitch, refer to "Selecting stitching" (page 49).

BABY LOCK Sofia BL137A - Select a stitch. - 1

Press on the screen.

JIP + 5/67 1.0 mm 2.5 mm

It turns to find the pattern displayed at the top of the screen is mirrored.

J W 1.0 mm 2.5 mm

BABY LOCK Sofia BL137A - Press on the screen. - 3

Memo

● To cancel the mirror image setting, press
- Mirror image is not possible for buttonholes and other stitches where shows.
- When the sewing machine is turned off, the mirror image setting is cancelled.

Saving stitch settings

This machine is preset with the default settings for the stitch width (zigzag width), stitch length, programmed thread-cutting, and automatic reverse/reinforcement stitching for each stitch. However, if you wish to save specific settings for a stitch so that they can be used later, press after changing the settings to save the new settings with the selected stitch. This feature can be used only with utility stitches. The settings you saved will not be cleared if the machine is turned off.

■To use a stitch length of 2.0 mm for the straight stitch

BABY LOCK Sofia BL137A - ■To use a stitch length of 2.0 mm for the straight stitch - 1

Select a straight stitch.

BABY LOCK Sofia BL137A - ■To use a stitch length of 2.0 mm for the straight stitch - 2

Press

BABY LOCK Sofia BL137A - ■To use a stitch length of 2.0 mm for the straight stitch - 3

Memo

● The default stitch length is 2.5 mm.

BABY LOCK Sofia BL137A - Memo - 1

Set the stitch length to 2.0 mm.

JIP + + V V V RESET MEM- ORY 0.0 mm -2.5 mm - + - +

BABY LOCK Sofia BL137A - Memo - 3

Press MEM. ORY

- To reset the selected stitch patterns to its default settings, press 📄 then press MEM-ORY

JIP + + V RESET MEM- ORY W 0.0 mm --2.0 mm - + - +

The confirmation message is displayed.

BABY LOCK Sofia BL137A - Memo - 5

Press OK

OK to save the current settings? CANCEL OK

The next time that the same straight stitch is selected, the stitch length is set to 2.0 mm.

BABY LOCK Sofia BL137A - Memo - 7

Note

- All stitch settings (stitch width (zigzag width), stitch length, programmed thread-cutting, and automatic reverse/reinforcement stitching, etc.) are saved, not just the setting that was changed. When the same stitch pattern is selected, the last settings saved are displayed even if the machine was turned off. If the settings are changed again and [RE] pressed, or if [RESET] is pressed to reset the setting to its default, the new settings are not saved unless [MEM-DRY] is pressed another time. Even if [RE] pressed, the settings for programmed thread-cutting and automatic reverse/reinforcement stitching are saved in the machine.

Useful Sewing Tips

Various ways to achieve better results for your sewing projects are described below. Refer to these tips when sewing your project.

Trial sewing

After you have set up the machine with the thread and needle appropriate for the type of fabric being sewn, the machine automatically sets the stitch length and width for the stitch that is selected. However, a trial piece of fabric should be sewn. Depending on the type of fabric and stitching being sewn, the desired results may vary. For trial sewing, use a piece of fabric and thread that are the same as those used for your project, and check the thread tension and stitch length and width. Since the results may vary depending on the type of stitching and the number of layers of fabric sewn, perform the trial sewing under the same conditions that will be used with your project.

Changing the sewing direction

When the stitching reaches a corner, stop the sewing machine.

Leave the needle lowered (in the fabric). If the needle remained up when the machine stopped sewing, press (Needle position button) to lower the needle.

2 Raise the presser foot lever, and then turn the fabric.

Turn the fabric using the needle as a pivot.

BABY LOCK Sofia BL137A - Raise the presser foot lever, and then turn the fabric. - 1

natural_image Line drawing of a sewing machine needle being adjusted, showing the handle and angle (no text or symbols)

3 Lower the presser foot lever and continue sewing.

Sewing curves

Stop sewing, and then slightly change the sewing direction to sew around the curve. For details on sewing with an even seam allowance, refer to "Sewing an even seam allowance" (page 67).

BABY LOCK Sofia BL137A - Sewing curves - 1

natural_image Mechanical assembly diagram showing a clamping mechanism with no visible text or symbols

When sewing along a curve while using a zigzag stitch, select a shorter stitch length in order to obtain a finer stitch.

BABY LOCK Sofia BL137A - Sewing curves - 2

natural_image Mechanical sewing machine diagram showing needle insertion and stitching (no text or symbols)

Sewing thick fabrics

■If the fabric does not fit under the presser foot

Raise the presser foot lever even higher to bring the presser foot to its highest position.

BABY LOCK Sofia BL137A - ■If the fabric does not fit under the presser foot - 1

natural_image Line drawing of a sewing machine needle stitching fabric, with a hand adjusting the component (no text or symbols)

■If thick seams are being sewn and the fabric does not feed at the beginning of stitching

Zigzag foot "J" is equipped with a feature that keeps the presser foot level.

BABY LOCK Sofia BL137A - ■If thick seams are being sewn and the fabric does not feed at the beginning of stitching - 1

natural_image Diagram of a sewing machine needle and foot, showing mechanical components and motion direction (no text or symbols)

① Sewing direction

① Raise the presser foot lever.

② Press the black button (presser foot holding pin) on the left side of zigzag foot "J". Keep the button held in and lower the presser foot.

BABY LOCK Sofia BL137A - ■If thick seams are being sewn and the fabric does not feed at the beginning of stitching - 2

natural_image Illustration of a sewing machine needle with hands operating it (no text or symbols visible)

① Presser foot holding pin

Release the button. The foot will lock in place level with the seam, allowing the fabric to feed.

BABY LOCK Sofia BL137A - ■If thick seams are being sewn and the fabric does not feed at the beginning of stitching - 3

natural_image Diagram of a sewing machine needle stitching fabric, showing handle and base (no text or symbols)

Once the trouble spot has been passed, the foot will return to its normal position.

CAUTION

- If fabric more than 6 mm (15/64 inch) thick is sewn or if the fabric is pushed with too much force, the needle may bend or break.

Sewing hook-and-loop fastener

CAUTION

- Use only the ungummed hook-and-loop fastener designed for sewing. If the glue adheres to the needle or the bobbin hook race, it may cause malfunction.

- If the hook-and-loop fastener is sewn with a fine needle (65/9-75/11), the needle may bend or break.

BABY LOCK Sofia BL137A - CAUTION - 1

Note

● Before starting to sew, baste the fabric and hook-and-loop together.

Make sure that the needle passes through the hook-and-loop fastener by turning the handwheel and lower the needle into the hook-and-loop fastener before sewing. And then, sew the edge of the hook-and-loop fastener at a slow speed. If the needle does not pass through the hook-and-loop fastener, replace the needle with the needle for thick fabrics (page 39).

BABY LOCK Sofia BL137A - Note - 1

natural_image Line drawing of a sewing machine needle and foot assembly (no text or symbols)

① Edge of the hook-and-loop fastener

Sewing thin fabrics

When sewing thin fabrics, the stitching may become misaligned or the fabric may not feed correctly. If this occurs, place thin paper or stabilizer material under the fabric and sew it together with the fabric. When you have finished sewing, tear off any excess paper.

BABY LOCK Sofia BL137A - Sewing thin fabrics - 1

natural_image Mechanical assembly diagram showing a sewing machine with a green tool inserted, no visible text or symbols

① Stabilizer material or paper

Sewing stretch fabrics

First, baste the pieces of fabric together, and then sew without stretching the fabric.

BABY LOCK Sofia BL137A - Sewing stretch fabrics - 1

natural_image Mechanical assembly diagram showing a sewing machine needle and base mount (no text or symbols)

① Basting

Using the stretch stitches or the thread for knits gives an attractive finish.

4 5 9 1 0 3 4

Sewing an even seam allowance

To sew an even seam, start sewing so that the seam allowance is to the right of the presser foot, and the edge of the fabric is aligned with either the right edge of the presser foot or a marking on the needle plate.

■Aligning the fabric with the presser foot

Sew while keeping the right edge of the presser foot aligned with a fixed distance from the edge of the fabric.

Diagram of a mechanical device with labeled parts and directional arrows indicating movement or force

① Seam
② Presser foot

BABY LOCK Sofia BL137A - ■Aligning the fabric with the presser foot - 2

Memo

- If the straight stitch (left needle position, triple stretch stitch, basting stitch etc.) is selected, you can change the distance between the seam and the right edge of the presser foot by changing the stitch width. For details, refer to "Changing the needle position" (page 79).

■Aligning the fabric with a needle plate marking

The markings on the needle plate show the distance from the needle position of a seam sewn with the straight stitch (left needle position). Sew while keeping the edge of the fabric aligned with a marking in the needle plate. The distance between the markings in the upper scale is 1/8 inch (3 mm) and the distance between the markings in the grid is 5 mm (3/16 inch).

① ② ⑥ ⑤ in 1/4 5/8 1 2 3 4 cm ④ ③

① Seam
② Presser foot
③ Centimeters
④ Inches
⑤ Needle plate
⑥ 1.6 cm (5/8 inch)

3 UTILITY STITCHES

The various stitches and their applications are described in this chapter.

Stitch Setting Chart ....70

Overcasting Stitches....74

Basic Stitching....78

Blind Hem Stitching 80

Buttonhole Stitching/Button Sewing....83

Zipper Insertion....90

Sewing Stretch Fabrics and Elastic Tape 95

Appliqué, Patchwork and Quilt Stitching 97

Reinforcement Stitching ....103

Eyelet Stitching....108

Decorative Stitching....109

Stitch Setting Chart

Applications, stitch lengths and widths and whether the twin needle can be used are listed for utility stitches in the following table.

Utility stitches

Stitch Name PatternPresser FootApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Twin NeedleReverse/ Reinforcement StitchingWalking Foot
Auto Manual Auto Manual
Straight stitchLeftBABY LOCK Sofia BL137A - Stitch Setting Chart - 1JBasic stitching, sewing gathers or pintucks, etc.0.0(0)0.0-7.0(0-1/4)2.5(3/32)0.2-5.0(1/64-3/16)Yes(J)Reverse No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 2JBasic stitching and sewing gathers or pintucks0.0(0)0.0-7.0(0-1/4)2.5(3/32)0.2-5.0(1/64-3/16)Yes(J)Reinforcement Yes
CenterBABY LOCK Sofia BL137A - Stitch Setting Chart - 3J/IAttaching zippers, basic stitching, sewing gathers or pintucks, etc.3.5(1/8)0.0-7.0(0-1/4)2.5(3/32)0.2-5.0(1/64-3/16)Yes(J)Reverse No
Triple stretch stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 4JAttaching sleeves, sewing inseams, sewing stretch fabrics and decorative stitching0.0(0)0.0-7.0(0-1/4)2.5(3/32)1.5-4.0(1/16-3/16)Yes(J)Reinforcement No
Stretch stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 5JSewing stretch fabrics and decorative stitching1.0(1/16)1.0-3.0(1/16-1/8)2.5(3/32)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
Basting stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 6JTemporarily securing0.0(0)0.0-7.0(0-1/4)--No ReinforcementNo
Zigzag stitchCenterBABY LOCK Sofia BL137A - Stitch Setting Chart - 7JOvercasting and attaching appliqués3.5(1/8)0.0-7.0(0-1/4)1.4(1/16)0.0-4.0(0-3/16)Yes(J)Reverse No
RightBABY LOCK Sofia BL137A - Stitch Setting Chart - 8JBeginning sewing from the right needle position3.5(1/8)2.5-5.0(3/32-3/16)1.4(1/16)0.3-4.0(1/64-3/16)Yes(J)Reinforcement Yes
2-point zigzag stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 9JOvercasting on mediumweight or stretch fabrics, attaching elastic, darning, etc.5.0(3/16)1.5-7.0(1/16-1/4)1.0(1/16)0.2-4.0(1/64-3/16)Yes(J)Reinforcement Yes
3-point zigzag stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 10JOvercasting on mediumweight or stretch fabrics, attaching elastic, darning, etc.5.0(3/16)1.5-7.0(1/16-1/4)1.0(1/16)0.2-4.0(1/64-3/16)Yes(J)Reinforcement No
Overcasting stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 11GOvercasting on thin or mediumweight fabrics3.5(1/8)2.5-5.0(3/32-3/16)2.0(1/16)1.0-4.0(1/16-3/16)No Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 12GOvercasting on thick fabrics5.0(3/16)2.5-5.0(3/32-3/16)2.5(3/32)1.0-4.0(1/16-3/16)No Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 13GOvercasting on thick fabrics and decorative stitching5.0(3/16)3.5-5.0(1/8-3/16)2.5(3/32)1.0-4.0(1/16-3/16)No Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 14JOvercasting on stretch fabrics5.0(3/16)0.0-7.0(0-1/4)2.5(3/32)0.5-4.0(1/32-3/16)Yes(J)Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 15JOvercasting on thick or stretch fabrics5.0(3/16)0.0-7.0(0-1/4)2.5(3/32)0.5-4.0(1/32-3/16)Yes(J)Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 16JOvercasting on stretch fabrics and decorative stitching4.0(3/16)0.0-7.0(0-1/4)4.0(3/16)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
Blind hem stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 17RBlind hem stitching on mediumweight fabrics003←→32.0(1/16)1.0-3.5(1/16-1/8)NoReinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 18RBlind hem stitching on stretch fabrics003←→32.0(1/16)1.0-3.5(1/16-1/8)NoReinforcement No
Appliqué stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 19JAppliqué stitching3.5(1/8)2.5-7.0(3/32-1/4)2.5(3/32)1.6-4.0(1/16-3/16)Yes(J)Reinforcement No
Shell tuck stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 20JShell tuck stitching4.0(3/16)0.0-7.0(0-1/4)2.5(3/32)0.2-4.0(1/64-3/16)Yes(J)Reinforcement No
Piecing straight stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 21JPiecing straight stitching (with a seam allowance of 6.5 mm (1/4 inch) from the right edge of the presser foot)5.5(7/32)0.0-7.0(0-1/4)2.0(1/16)0.2-5.0(1/64-3/16)NoReinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 22JPiecing straight stitching (with a seam allowance of 6.5 mm (1/4 inch) from the left edge of the presser foot)1.5(1/16)0.0-7.0(0-1/4)2.0(1/16)0.2-5.0(1/64-3/16)NoReinforcement Yes
Straight stitch that looks hand-sewn (for quilting)BABY LOCK Sofia BL137A - Stitch Setting Chart - 23JStraight stitch quilting that looks hand-sewn0.0(0)0.0-7.0(0-1/4)2.5(3/32)1.0-4.0(1/16-3/16)NoReinforcement No
Zigzag stitch (for quilting)BABY LOCK Sofia BL137A - Stitch Setting Chart - 24JAppliqué quilting, free-motion quilting, satin stitching3.5(1/8)0.0-7.0(0-1/4)1.4(1/16)0.0-4.0(0-3/16)NoReinforcement Yes
Appliqué stitch (for quilting)BABY LOCK Sofia BL137A - Stitch Setting Chart - 25JAttaching appliqués and binding1.5(1/16)0.5-3.5(1/32-1/8)1.8(1/16)1.0-4.0(1/16-3/16)NoReinforcement No
Quilting stitch (for stippling)BABY LOCK Sofia BL137A - Stitch Setting Chart - 26JQuilting background stitching (stippling)7.0(1/4)1.0-7.0(1/16-1/4)1.6(1/16)1.0-4.0(1/16-3/16)NoReinforcement No
Satin scallop stitch[KAYS]NScallop stitching5.0(3/16)2.5-7.0(3/32-1/4)0.5(1/32)0.1-1.0(1/64-1/16)Yes(J)Reinforcement No
Joining stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 27JPatchwork stitching and decorative stitching4.0(3/16)0.0-7.0(0-1/4)1.2(1/16)0.2-4.0(1/64-3/16)Yes(J)Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 28JPatchwork stitching, decorative stitching and sewing overcasting on both pieces of fabric, such as with tricot5.0(3/16)2.5-7.0(3/32-1/4)2.5(3/32)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
BABY LOCK Sofia BL137A - Stitch Setting Chart - 29JPatchwork stitching and decorative stitching5.0(3/16)0.0-7.0(0-1/4)1.2(1/16)0.2-4.0(1/64-3/16)Yes(J)Reinforcement No
Smocking stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 30JSmocking stitching and decorative stitching5.0(3/16)0.0-7.0(0-1/4)1.6(1/16)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
Fagoting stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 31JFagoting and decorative stitching5.0(3/16)0.0-7.0(0-1/4)2.5(3/32)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
[Z2ZW]JFagoting and decorative stitching5.0(3/16)2.5-7.0(3/32-1/4)2.5(3/32)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
Elastic-attaching stitchDecorative stitchBABY LOCK Sofia BL137A - Stitch Setting Chart - 323[072A]JJAttaching elastic to stretch fabricsDecorative stitching4.0(3/16)4.0(3/16)0.0-7.0(0-1/4)0.0-7.0(0-1/4)1.0(1/16)3.0(1/8)0.2-4.0(1/64-3/16)2.0-4.0(1/16-3/16)Yes(J)NoReinforcement NoReinforcement No
3[0YTX]JDecorative stitching4.0(3/16)0.0-7.0(0-1/4)2.5(3/32)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
3[647A]JDecorative stitching5.5(7/32)0.0-7.0(0-1/4)1.6(1/16)1.0-4.0(1/16-3/16)Yes(J)Reinforcement No
3BABY LOCK Sofia BL137A - Stitch Setting Chart - 33NDecorative stitching and elastic-attaching5.0(3/16)1.5-7.0(1/16-1/4)1.0(1/16)0.2-4.0(1/64-3/16)Yes(J)Reinforcement No
3[8XG3]NLace sewing, decorative hemming, heirloom stitching, etc.3.5(1/8)1.5-7.0(1/16-1/4)2.5(3/32)1.6-4.0(1/16-3/16)NoReinforcement No
4BABY LOCK Sofia BL137A - Stitch Setting Chart - 34NDecorative hemming, heirloom stitching, etc.6.0(15/64)1.5-7.0(1/16-1/4)3.0(1/8)1.5-4.0(1/16-3/16)NoReinforcement No
4[0YHB]NDecorative hemming on thin, mediumweight and plain weave fabrics, heirloom stitching, etc.5.0(3/16)1.5-7.0(1/16-1/4)3.5(1/8)1.5-4.0(1/16-3/16)NoReinforcement No
4[0C74A]NDecorative hemming on thin, mediumweight and plain weave fabrics, heirloom stitching, etc.5.0(3/16)1.5-7.0(1/16-1/4)4.0(3/16)1.5-4.0(1/16-3/16)Yes(J)Reinforcement No
4[50ZZ]NDecorative hemming on thin, mediumweight and plain weave fabrics, heirloom stitching, etc.5.0(3/16)1.5-7.0(1/16-1/4)2.5(3/32)1.5-4.0(1/16-3/16)Yes(J)Reinforcement No
4[0C20Z]NDecorative hemming on thin, mediumweight and plain weave fabrics, heirloom stitching, etc.5.0(3/16)1.5-7.0(1/16-1/4)2.0(1/16)1.5-4.0(1/16-3/16)Yes(J)Reinforcement No
4[5HXX]NDecorative hemming, ribbon threading, heirloom stitching, etc.5.0(3/16)1.5-7.0(1/16-1/4)3.0(1/8)1.5-4.0(1/16-3/16)Yes(J)Reinforcement No
4[0AHS]NDecorative stitching, smocking stitching, heirloom stitching, etc.6.0(15/64)1.5-7.0(1/16-1/4)1.6(1/16)1.0-4.0(1/16-3/16)NoReinforcement No
4BABY LOCK Sofia BL137A - Stitch Setting Chart - 3546BABY LOCK Sofia BL137A - Stitch Setting Chart - 36NADecorative stitching, smocking stitching, heirloom stitching, etc.Horizontal buttonholes on thin and mediumweight fabrics5.0(3/16)5.0(3/16)1.5-7.0(1/16-1/4)3.0-5.0(1/8-3/16)1.6(1/16)0.5(1/32)1.0-4.0(1/16-3/16)0.2-1.0(1/64-1/16)NoNoReinforcement NoAutomatic reinforcementNo
Buttonhole stitch
46BABY LOCK Sofia BL137A - Stitch Setting Chart - 37AHorizontal buttonholes on areas that are subject to strain5.0(3/16)3.0-5.0(1/8-3/16)0.5(1/32)0.2-1.0(1/64-1/16)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 38AHorizontal buttonholes on thick fabrics5.0(3/16)3.0-5.0(1/8-3/16)0.5(1/32)0.2-1.0(1/64-1/16)NoAutomatic reinforcementNo
56[8WG]ASecured buttonholes for fabrics that have backings5.0(3/16)3.0-5.0(1/8-3/16)0.5(1/32)0.2-1.0(1/64-1/16)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 39AButtonholes for stretch or knit fabrics6.0(15/54)3.0-6.0(1/8-15/64)1.0(1/16)0.5-2.0(1/32-1/16)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 40AButtonholes for stretch fabrics6.0(15/54)3.0-6.0(1/8-15/64)1.5(1/16)1.0-3.0(1/16-1/8)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 41ABound buttonholes5.0(3/16)0.0-6.0(0-15/64)2.0(1/16)0.2-4.0(1/64-3/16)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 42AKeyhole buttonholes for thick or furry fabrics7.0(1/4)3.0-7.0(1/8-1/4)0.5(1/32)0.3-1.0(1/64-1/16)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 43AKeyhole buttonholes for mediumweight and thick fabrics7.0(1/4)3.0-7.0(1/8-1/4)0.5(1/32)0.3-1.0(1/64-1/16)NoAutomatic reinforcementNo
56[KBXC]AHorizontal buttonholes for thick or furry fabrics7.0(1/4)3.0-7.0(1/8-1/4)0.5(1/32)0.3-1.0(1/64-1/16)NoAutomatic reinforcementNo
Darning stitch56BABY LOCK Sofia BL137A - Stitch Setting Chart - 44ADarning mediumweight fabrics7.0(1/4)2.5-7.0(3/32-1/4)2.0(1/16)0.4-2.5(1/64-3/32)NoAutomatic reinforcementNo
56BABY LOCK Sofia BL137A - Stitch Setting Chart - 45ADarning thick fabrics7.0(1/4)2.5-7.0(3/32-1/4)2.0(1/16)0.4-2.5(1/64-3/32)NoAutomatic reinforcementNo
Bar tack stitch66BABY LOCK Sofia BL137A - Stitch Setting Chart - 46AReinforcing openings and areas where the seam easily comes loose2.0(1/16)1.0-3.0(1/16-1/8)0.4(1/64)0.3-1.0(1/64-1/16)NoAutomatic reinforcementNo
Button-sewing stitch66BABY LOCK Sofia BL137A - Stitch Setting Chart - 47MButton sewing3.5(1/8)2.5-4.5(3/32-3/16)--NoAutomatic reinforcementNo
Eyelet stitch66BABY LOCK Sofia BL137A - Stitch Setting Chart - 48NSewing eyelets, for example, on belts7.0(1/4)7.0, 6.0, 5.0(1/4, 15/64, 3/16)7.0(1/4)7.0, 6.0, 5.0(1/4, 15/64, 3/16)NoAutomatic reinforcementNo
Side cutter*166BABY LOCK Sofia BL137A - Stitch Setting Chart - 49SSewing straight stitches while cutting the fabric0.0(0)0.0-2.5(0-3/32)2.5(3/32)0.2-5.0(1/64-3/16)NoReinforcement No
66BABY LOCK Sofia BL137A - Stitch Setting Chart - 50SSewing zigzag stitches while cutting the fabric3.5(1/8)3.5-5.0(1/8-3/16)1.4(1/16)0.0-4.0(0-3/16)NoReinforcement No
66BABY LOCK Sofia BL137A - Stitch Setting Chart - 51SOvercasting on thin and mediumweight fabrics while cutting the fabric3.5(1/8)3.5-5.0(1/8-3/16)2.0(1/16)1.0-4.0(1/16-3/16)NoReinforcement No
66BABY LOCK Sofia BL137A - Stitch Setting Chart - 52SOvercasting on thick fabrics while cutting the fabric5.0(3/16)3.5-5.0(1/8-3/16)2.5(3/32)1.0-4.0(1/16-3/16)NoReinforcement No
66BABY LOCK Sofia BL137A - Stitch Setting Chart - 53SOvercasting on mediumweight and thick fabrics while cutting the fabric5.0(3/16)3.5-5.0(1/8-3/16)2.5(3/32)1.0-4.0(1/16-3/16)NoReinforcement No

*1: Side cutter is optional.

Overcasting Stitches

Sew overcasting stitches along the edges of cut fabric to prevent them from fraying. 15 stitches are available for overcasting. The procedure for sewing overcasting stitches is explained according to the presser foot that is used.

Sewing overcasting stitches using overcasting foot "G"

Three stitches can be used to sew overcasting with overcasting foot "G".

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
Auto Manual Auto Manual
Overcasting stitchBABY LOCK Sofia BL137A - Sewing overcasting stitches using overcasting foot "G" - 1Preventing fraying in medium weight and thin fabrics3.5 (1/8)2.5-5.0 (3/32-3/16)2.0 (1/16)1.0-4.0 (1/16-3/16)G
BABY LOCK Sofia BL137A - Sewing overcasting stitches using overcasting foot "G" - 2Preventing fraying in thick fabrics and fabrics that fray easily5.0 (3/16)2.5 (3/32)
BABY LOCK Sofia BL137A - Sewing overcasting stitches using overcasting foot "G" - 33.5-5.0 (1/8-3/16)

BABY LOCK Sofia BL137A - Sewing overcasting stitches using overcasting foot "G" - 4

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

1

Attach overcasting foot "G".

BABY LOCK Sofia BL137A - 1 - 1

- For details, refer to "Replacing the presser foot" (page 43).

2

Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

G6 3.5 mm 2.0 mm

3

Position the fabric with the edge of the fabric against the guide of the presser foot, and then lower the presser foot lever.

Technical diagram of a sewing machine with labeled component and connection point

① Guide

4

Sew with the edge of the fabric against the presser foot guide.

BABY LOCK Sofia BL137A - 4 - 1

natural_image Diagram of a spring-loaded structure with labeled component (①), no text or symbols present

① Needle drop point

Sewing overcasting stitches using zigzag foot "J"

Seven stitches can be used to sew overcasting stitches with zigzag foot "J".

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
Auto Manual Auto Manual
Zigzag stitch (center needle position)[DS7T]Preventing fraying (center baseline/reverse stitching)3.5 (1/8)0.0-7.0 (0-1/4)1.4 (1/16)0.0-4.0 (0-3/16)J
Zigzag stitch (right needle position)BABY LOCK Sofia BL137A - Sewing overcasting stitches using zigzag foot "J" - 1Preventing fraying (right baseline/reinforcement stitching)2.5-5.0 (3/32-3/16)0.3-4.0 (1/64-3/16)
2-point zigzag stitchBABY LOCK Sofia BL137A - Sewing overcasting stitches using zigzag foot "J" - 2Preventing fraying in thick fabrics and stretch fabrics5.0 (3/16)1.5-7.0 (1/16-1/4)1.0 (1/16)0.2-4.0 (1/64-3/16)
3-point zigzag stitch1~BABY LOCK Sofia BL137A - Sewing overcasting stitches using zigzag foot "J" - 3
Overcasting stitch1BABY LOCK Sofia BL137A - Sewing overcasting stitches using zigzag foot "J" - 4Preventing fraying in stretch fabrics0.0-7.0 (0-1/4)2.5 (3/32)0.5-4.0 (1/32-3/16)
1[8S68]Preventing fraying in thick fabrics and stretch fabrics
1BABY LOCK Sofia BL137A - Sewing overcasting stitches using zigzag foot "J" - 5Preventing fraying in stretch fabrics4.0 (3/16)4.0 (3/16)1.0-4.0 (1/16-3/16)

BABY LOCK Sofia BL137A - Sewing overcasting stitches using zigzag foot "J" - 6

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if ⏻/ ⏻ (Start/stop button) is accidentally pressed and the machine starts sewing.

1 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - CAUTION - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

2 Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

W 3.5 mm -- 1.4 mm

3 Sew along the edge of the fabric with the needle dropping off the edge at the right.

Technical diagram showing mechanical assembly with labeled parts and a close-up of a textured surface with green zigzag lines.

① Needle drop point

Sewing overcasting stitches using the optional side cutter

Using the optional side cutter, seam allowances can be finished while the edge of the fabric is cut off. Five stitches can be used to sew overcasting stitches with the side cutter.

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
Auto Manual Auto Manual
Side cutter63Sewing straight stitches while cutting the fabric0.0(0)0.0-2.5(0-3/32)2.5(3/32)0.2-5.0(1/64-3/16)S
64Sewing zigzag stitches while cutting the fabric3.5(1/8)3.5-5.0(1/8-3/16)1.4(1/16)0.0-4.0(0-3/16)
65Preventing fraying in thin and mediumweight fabrics while cutting the fabric2.0(1/16)1.0-4.0(1/16-3/16)
66Preventing fraying in thick fabrics while cutting the fabric5.0(3/16)2.5(3/32)
67Preventing fraying in thick fabrics while cutting the fabric

BABY LOCK Sofia BL137A - Sewing overcasting stitches using the optional side cutter - 1

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

BABY LOCK Sofia BL137A - CAUTION - 1

BABY LOCK Sofia BL137A - CAUTION - 2

Note

- Thread the needle manually when using the side cutter, or only attach the side cutter after threading the needle using the needle threader.

BABY LOCK Sofia BL137A - Note - 1

Remove the presser foot.

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Remove the presser foot. - 1

Hook the connecting fork of the side cutter onto the needle clamp screw.

Technical diagram of a mechanical assembly with labeled parts, showing components like a clamp and lever mechanism.

① Connecting fork
② Needle clamp screw

BABY LOCK Sofia BL137A - Hook the connecting fork of the side cutter onto the needle clamp screw. - 2

Position the side cutter so that side cutter pin is aligned with the notch in the presser foot holder, and then slowly lower the presser foot lever.

Technical diagram of a sewing machine with labeled parts ① and ②

① Notch in presser foot holder
② Pin

The side cutter is attached.

4 Raise the presser foot lever to check that the side cutter is securely attached.

5 Pass the upper thread under the side cutter, and then pull it out toward the rear of the sewing machine.

BABY LOCK Sofia BL137A - Hook the connecting fork of the side cutter onto the needle clamp screw. - 4

natural_image Mechanical sewing machine diagram showing needle insertion and angle measurement (no text or symbols)

6 Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

S6 + + W 0.0 mm - 2.5 mm

67/67 W 5.0 mm -- 2.5 mm

7 Make a cut of about 2 cm (3/4 inch) long in the fabric at the beginning of the stitching.

BABY LOCK Sofia BL137A - Hook the connecting fork of the side cutter onto the needle clamp screw. - 7

natural_image Diagram showing a slope with a curved surface and an arrow indicating direction (no text or symbols)

① 2 cm (3/4 inch)

Position the fabric in the side cutter.

The cut in the fabric should be positioned over the guide plate of the side cutter.

BABY LOCK Sofia BL137A - Hook the connecting fork of the side cutter onto the needle clamp screw. - 8

natural_image Technical illustration of a sewing machine needle and foot assembly (no text or symbols)

① Guide plate
BABY LOCK Sofia BL137A - Hook the connecting fork of the side cutter onto the needle clamp screw. - 9

Memo

- If the fabric is not positioned correctly, the fabric will not be cut.

9 Lower the presser foot lever, and then start sewing.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Technical line drawing of a sewing machine needle and base (no text or symbols)

A seam allowance is cut while the stitching is sewn.

BABY LOCK Sofia BL137A - Memo - 2

Memo

- If the stitching is sewn in a straight line 63 the seam allowance will be about 5 mm (3/16 inch).

Diagram showing a sloped surface with a dashed line and labeled step ①, likely illustrating a geometric or mechanical process.

① 5 mm (3/16 inch)

● The side cutter can cut as much as one layer of 13-oz. denim.

● After using the side cutter, clean to remove any lint or dust.

- If the side cutter can no longer cut fabric, use a rag to apply a small amount of oil to the cutting edge of the cutter.

BABY LOCK Sofia BL137A - Memo - 2

Basic Stitching

Straight stitches are used for sewing plain seams. Five stitches are available for basic stitching.

Stitch Name Pattern ApplicationStitch Width[mm (inch)]Stitch Length[mm (inch)]Presser Foot
Auto Manual Auto Manual
Basting stitch(2ATZ)Temporarily securing0.0(0)0.0-7.0(0-1/4)--J
Straight stitch(left needle position)1(ZBXD)Basic stitching and sewinggathers or pintucks (left baseline/reverse stitching)2.5(3/32)0.2-5.0(1/64-3/16)
2(G3HT)Basic stitching and sewinggathers or pintucks (left baseline/reinforcement stitching)
Straight stitch(center needle position)3(YX5Y)Basic stitching and sewinggathers or pintucks (centerbaseline/reverse stitching)3.5(1/8)
Triple stretch stitch4(8TCS)Reinforcing seams and sewingstretch fabrics0.0(0)1.5-4.0(1/16-3/16)

BABY LOCK Sofia BL137A - Basic Stitching - 1

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

Basting

1 Attach zigzag foot "J".

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Basting - 1

2 Select stitch ^6 .

- For details, refer to "Selecting stitching" (page 49).

JG + 8 6/67 W--- W 0.0 mm --- -mm

3 Start sewing.

- For details, refer to "Starting to sew" (page 51).

Basic stitching

1 Baste or pin together the fabric pieces.

2 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Basic stitching - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

3 Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

JIP + 8 1/67 W--- W/0.0 mm --- 2.5 mm

4 Lower the needle into the fabric at the beginning of the stitching.

5 Start sewing.

  • For details, refer to "Starting to sew" (page 51).
  • For details on sewing reverse/reinforcement stitches, refer to "Securing the stitching" (page 53).

6 When sewing is finished, cut the thread.

- For details, refer to "Cutting the thread" (page 55).

BABY LOCK Sofia BL137A - When sewing is finished, cut the thread. - 1

■Changing the needle position

The needle position used as the baseline is different for the straight stitch (left needle position) and the straight stitch (center needle position).

Diagram showing two mechanical or electrical component configurations labeled ① and ②, with J connectors and dashed green lines indicating alignment.

① Straight stitch (left needle position)
② Straight stitch (center needle position)

When the stitch width of the straight stitch (left needle position) is set to its standard setting (0.0 mm), the distance from the needle position to the right side of the presser foot is 12 mm (1/2 inch). If the stitch width is changed (between 0 and 7.0 mm (1/4 inch)), the needle position will also change. By changing the stitch width and sewing with the right side of the presser foot aligned with the edge of the fabric, a seam allowance can be sewn with a fixed width.

0.0 2.0 5.5 7.0 ① J J J J ③ ④ ⑤ ⑥ ②

① Stitch width setting
② Distance from the needle position to the right side of the presser foot
③ 12.0 mm (1/2 inch)
④ 10.0 mm (3/8 inch)
⑤ 6.5 mm (1/4 inch)
⑥ 5.0 mm (3/16 inch)

BABY LOCK Sofia BL137A - ■Changing the needle position - 3

natural_image Mechanical assembly diagram showing a lever mechanism with motion arrows (no text or labels)

- For details, refer to "Adjusting the stitch width" (page 57).

BABY LOCK Sofia BL137A - ■Changing the needle position - 4

Blind Hem Stitching

Secure the bottoms of skirts and pants with a blind hem. Two stitches are available for blind hem stitching.

Stitch NamePattern ApplicationStitch Width[mm (inch)]Stitch Length[mm (inch)]Presser Foot
AutoManualAutoManual
Blind hem stitchBABY LOCK Sofia BL137A - Blind Hem Stitching - 1Blind hem stitching on mediumweight fabrics003←→32.0(1/16)1.0-3.5(1/16-1/8)
BABY LOCK Sofia BL137A - Blind Hem Stitching - 2Blind hem stitching on stretch fabrics

BABY LOCK Sofia BL137A - Blind Hem Stitching - 3

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if ⏚/💡 (Start/stop button) is accidentally pressed and the machine starts sewing.

Sew a blind hem according to the following procedure.

BABY LOCK Sofia BL137A - CAUTION - 1

Memo

- When the size of cylindrical pieces is too small to slide onto the arm or the length is too short, the fabric will not feed and desired results may not be achieved.

BABY LOCK Sofia BL137A - Memo - 1

Reverse the skirt or pants.

BABY LOCK Sofia BL137A - Memo - 2

natural_image Simple diagram of a cylindrical object with two labeled parts (① and ②), no text or symbols present.

① Right side of fabric
② Bottom side

BABY LOCK Sofia BL137A - Memo - 3

Fold the fabric along the desired edge of the hem, and press.

① ② ① ② < Seen from the side>

① Wrong side of fabric
② Right side of fabric

BABY LOCK Sofia BL137A - Memo - 5

Use a chalk to mark on the fabric about 5 mm (3/16 inch) from the edge of the fabric, and then baste it.

< Seen from the side>

① Wrong side of fabric
② Right side of fabric
③ Edge of fabric
④ Basting stitching
⑤ 5 mm (3/16 inch)

4 Fold back the fabric inside along the basting.

2 4 3 1 1 < Seen from the side>

a Wrong side of fabric
b Edge of fabric
c Basting
d 5 mm (3/16 inch)

5 Unfold the edge of fabric, and position the fabric with the wrong side facing up.

1 2 3 1 1 < Seen from the side>

a Wrong side of fabric
b Basting
c Edge of fabric

6 Attach blind hem foot "R".

BABY LOCK Sofia BL137A - Memo - 9

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

7 Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

R 17/67 W--- W 0.0 --2.0mm

8 Remove the flat bed attachment and make free-arm sewing possible.

- For details on free-arm sewing, refer to "Free-arm sewing" (page 46).

9 Slide the item that you wish to sew onto the arm, make sure that the fabric feeds correctly, and then start sewing.

BABY LOCK Sofia BL137A - Memo - 11

natural_image Technical line drawing of a mechanical buckle assembly (no text or symbols)

a Arm

10 Position the fabric with the edge of the folded hem against the guide of the presser foot, and then lower the presser foot lever.

Technical diagram of a mechanical assembly with labeled components and parts

a Wrong side of fabric
b Fold of hem
c Guide

11 Adjust the stitch width until the needle slightly catches the fold of the hem.

1

a Needle drop point

When you change the needle drop point, raise the needle, and then change the stitch width.

a - ← → + +

a Stitch width

BABY LOCK Sofia BL137A - Memo - 15

■If the needle catches too much of the hem fold

The needle is too far to the left. Press to decrease the stitch width so that the needle slightly catches the fold of the hem.

Diagram illustrating a mechanical or structural change process, showing a spring-loaded component before and after deformation.

① Wrong side of fabric
② Right side of fabric

■If the needle does not catch the hem fold

The needle is too far to the right. Press to increase the stitch width so that the needle slightly catches the fold of the hem.

Diagram showing two stages of a mechanical or structural transformation, labeled ① and ②, with a green arrow indicating direction.

① Wrong side of fabric
② Right side of fabric

BABY LOCK Sofia BL137A - ■If the needle does not catch the hem fold - 2

Memo

- For details, refer to "Adjusting the stitch width" (page 57).

12 Sew with the fold of the hem against the presser foot guide.

13 Remove the basting stitching and reverse the fabric.

Diagram showing a cylindrical object with a wavy edge and an arrow indicating transformation from left to right, labeled ① and ②.

① Wrong side of fabric
② Right side of fabric

Buttonhole Stitching/Button Sewing

Buttonholes can be sewn and buttons can be sewn on. 10 stitches are available for sewing one-step buttonholes, and one stitch is available for attaching the button.

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
Auto Manual Auto Manual
Buttonhole stitchBABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 1Horizontal buttonholes on thin and mediumweight fabrics5.0(3/16)3.0-5.0(1/8-3/16)0.5(1/32)0.2-1.0(1/64-1/16)A
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 2Horizontal buttonholes on areas that are subject to strain
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 3Horizontal buttonholes on thick fabrics
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 4Buttonholes with bar tacks on both ends for stabilized fabrics
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 5Buttonholes for stretch or knit fabrics6.0(15/64)3.0-6.0(1/8-15/64)1.0(1/16)0.5-2.0(1/32-1/16)
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 6Buttonholes for stretch fabrics1.5(1/16)1.0-3.0(1/16-1/8)
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 7Bound buttonholes5.0(3/16)0.0-6.0(0-15/64)2.0(1/16)0.2-4.0(1/64-3/16)
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 8Keyhole buttonholes for thick or plush fabrics7.0(1/4)3.0-7.0(1/8-1/4)0.5(1/32)0.3-1.0(1/64-1/16)
[DAH]Keyhole buttonholes for mediumweight and thick fabrics
BABY LOCK Sofia BL137A - Buttonhole Stitching/Button Sewing - 9Horizontal buttonhole for thick or plush fabrics
Button-sewing stitch61[72V8]Button sewing3.5(1/8)2.5-4.5(3/32-3/16)--M

Buttonhole sewing

The maximum buttonhole length is about 28 mm (1-1/8 inches) (diameter + thickness of the button). Buttonholes are sewn from the front of the presser foot to the back, as shown below.

BABY LOCK Sofia BL137A - Buttonhole sewing - 1

flowchart
graph TD
    A["Solidification Process"] --> B["Refrigeration"]
    B --> C{Refrigeration Path}
    C -->|Yes| D["Streamlines"]
    C -->|No| E["Streamlines"]
    D --> F["Compression"]
    E --> G["Compression"]
    F --> H["Recirculation"]
    G --> I["Recirculation"]
    H --> J["Final Compression"]
    I --> K["Final Compression"]

① Reinforcement stitching
BABY LOCK Sofia BL137A - Buttonhole sewing - 2

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

The names of parts of buttonhole foot "A", which is used for sewing buttonholes, are indicated below.

Technical diagram of a laboratory apparatus with numbered components labeled 1 through 6

① Button guide plate
② Presser foot scale
③ Pin
④ Reference marks
⑤ 5 mm (3/16 inch)
⑥ Bracket

1 Use chalk to mark on the fabric the position and length of the buttonhole.

Diagram illustrating a physical measurement setup with a ruler, a droplet, and a submerged container with liquid.

① Marks on fabric
② Buttonhole sewing

BABY LOCK Sofia BL137A - CAUTION - 3

Pull out the button guide plate of buttonhole foot "A", and then insert the button that will be put through the buttonhole.

BABY LOCK Sofia BL137A - CAUTION - 4

natural_image Technical line drawing of a mechanical device with two views (top and side), showing internal components and directional arrows (no text or symbols)

■If the button does not fit in the button guide plate

Add together the diameter and thickness of the button, and then set the button guide plate to the calculated length. (The distance between the markings on the presser foot scale is 5 mm (3/16 inch).)

Technical diagram of a mechanical device with numbered parts and dimension lines

① Presser foot scale
② Length of buttonhole (diameter + thickness of button)
③ 5 mm (3/16 inch)

Example:

For a button with a diameter of 15 mm (9/16 inch) and a thickness of 10 mm (3/8 inch), the button guide plate should be set to 25 mm (1 inch) on the scale.

BABY LOCK Sofia BL137A - ■If the button does not fit in the button guide plate - 2

① 10 mm (3/8 inch)
② 15 mm (9/16 inch)

The size of the buttonhole is set.

BABY LOCK Sofia BL137A - ■If the button does not fit in the button guide plate - 3

Attach buttonhole foot "A".

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Attach buttonhole foot "A". - 1

Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

48/67 5.0 mm -- 0.5 mm 49/67 5.0 mm -- 0.5 mm 55/67 7.0 mm -- 0.5 mm

BABY LOCK Sofia BL137A - Select a stitch. - 2

Position the fabric with the front end of the buttonhole mark aligned with the red marks on the sides of the buttonhole foot, and then lower the presser foot lever.

Technical diagram showing a mechanical assembly with labeled parts and directional arrows

① Mark on fabric (front)
② Red marks on buttonhole foot

• Pass the upper thread down through the hole in the presser foot.

BABY LOCK Sofia BL137A - Select a stitch. - 4

natural_image Technical line drawing of a mechanical assembly with no visible text or symbols

BABY LOCK Sofia BL137A - Select a stitch. - 5

BABY LOCK Sofia BL137A - Select a stitch. - 6

Note

  • Do not lower the needle into fabric when aligning the marks. Desired results may not be achieved.
  • When lowering the presser foot, do not push in the front of the presser foot.

BABY LOCK Sofia BL137A - Note - 1

natural_image Mechanical assembly diagram showing a cutting tool with a green X mark indicating a specific part (no text or symbols present)

BABY LOCK Sofia BL137A - Note - 2

natural_image Technical line drawing of a mechanical device with internal components and directional arrows (no text or symbols)

① Do not reduce the gap.

BABY LOCK Sofia BL137A - Note - 3

Pull down the buttonhole lever as far as possible.
BABY LOCK Sofia BL137A - Note - 4

natural_image Mechanical assembly diagram showing a hand operating a component with a green arrow indicating direction (no text or symbols present)

① Buttonhole lever

The buttonhole lever is positioned behind the bracket on the buttonhole foot.

Technical diagram showing two labeled mechanical components with numbered annotations

① Buttonhole lever
② Bracket

BABY LOCK Sofia BL137A - Note - 6
Gently hold the end of the upper thread in your left hand, and then start sewing.

BABY LOCK Sofia BL137A - Note - 7

natural_image Illustration of a sewing machine needle stitching a component, with no visible text or symbols

Once sewing is completed, the machine automatically sews reinforcement stitches, then stops.

BABY LOCK Sofia BL137A - Note - 8

Raise the presser foot lever, remove the fabric, and then cut the threads.

BABY LOCK Sofia BL137A - Note - 9

Raise the buttonhole lever to its original position.

BABY LOCK Sofia BL137A - Note - 10

Insert a pin along the inside of one bar tack at the end of the buttonhole stitching to prevent the stitching from being cut.

Diagram showing a test tube with a labeled connection point and directional arrow, likely illustrating a measurement or setup.

① Pin

BABY LOCK Sofia BL137A - Note - 12

Use the seam ripper to cut towards the pin and open the buttonhole.

Diagram showing a hand holding a tool with labeled parts, including a green tool and a pointer labeled 'Q'

① Seam ripper

For keyhole buttonholes, use the eyelet punch to make a hole in the rounded end of the buttonhole, and then use the seam ripper to cut open the buttonhole.

BABY LOCK Sofia BL137A - Note - 14

natural_image Illustration of a hand holding a pen and a tool, with no visible text or symbols

① Eyelet punch

BABY LOCK Sofia BL137A - Note - 15

Note

- When using the eyelet punch, place thick paper or some other protective sheet under the fabric before punching the hole in the fabric.

BABY LOCK Sofia BL137A - Note - 1

CAUTION

- When opening the buttonhole with the seam ripper, do not place your hands in the cutting path, otherwise injuries may result if the seam ripper slips.

●Do not use the seam ripper in any other way than how it is intended.

■Changing the density of the stitching Adjust the stitch length.

BABY LOCK Sofia BL137A - CAUTION - 1

BABY LOCK Sofia BL137A - CAUTION - 2

Memo

- For details, refer to "Adjusting the stitch length" (page 59).

- If the fabric does not feed (for example, if it is too thick), decrease the density of the stitching.

■Changing the stitch width

Adjust the stitch width.

BABY LOCK Sofia BL137A - Memo - 1

BABY LOCK Sofia BL137A - Memo - 2

Memo

- For details, refer to "Adjusting the stitch width" (page 57).

● Before sewing buttonholes, check the stitch length and width by sewing a trial buttonhole on a scrap piece of fabric.

■Sewing buttonholes on stretch fabrics

When sewing buttonholes on stretch or loosely woven fabrics, use a gimp thread.

① Hook the gimp thread onto the part of buttonhole foot "A" shown in the illustration.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Technical line drawing of a syringe with internal components and a magnified inset showing internal components (no text or symbols)

② It fits into the grooves, and then loosely tie it.

BABY LOCK Sofia BL137A - Memo - 2

natural_image Technical line drawing of a syringe with internal components and a magnified inset showing internal structure (no text or symbols)

3 Attach buttonhole foot "A".

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

④ Select stitch ^52 or ^53 .

5 Adjust the stitch width to the thickness of the gimp thread.

6 Lower the presser foot lever and the buttonhole lever, and then start sewing.

⑦ When sewing is finished, gently pull the gimp thread to remove any slack.

BABY LOCK Sofia BL137A - Memo - 3

natural_image Illustration of two hand-painted paper clips with green arrows indicating motion (no text or symbols)

⑧ Use a handsewing needle to pull the gimp thread to the wrong side of the fabric, and then tie it.

Button sewing

Buttons can be sewn on with the sewing machine. Buttons with two or with four holes can be attached.

1 Measure the distance between the holes in the button to be attached.

BABY LOCK Sofia BL137A - Button sewing - 1

2 Raise the presser foot lever, and then slide the drop feed lever, located at the rear of the machine on the base, to (1) the left as seen from the rear of the machine).

Diagram showing a device with labeled ports and an inset circular diagram indicating directional flow or movement.

① Drop feed lever (as seen from the rear of the machine)

The feed dogs are lowered.

3 Attach button-fitting foot "M".

BABY LOCK Sofia BL137A - Button sewing - 3

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

4 Select stitch 61

- For details, refer to "Selecting stitching" (page 49).

MD S S S 61/67 W 3.5 mm -- -mm

Note

● Since the end of the thread will be tied off later, do not set the sewing machine for programmed-thread cutting.

5 Adjust the stitch width so that it is the same as the distance between the holes in the button.

6 Place the button in the position where it will be sewn, and lower the presser foot lever.

BABY LOCK Sofia BL137A - Button sewing - 5

natural_image Technical line drawing of a mechanical device with two views: top shows a pin and base, bottom shows a foot assembly (no text or symbols)

① Button

The button is held in place.

BABY LOCK Sofia BL137A - Button sewing - 6

Memo

- When attaching four-hole buttons, first sew the two holes closest to you. Then, slide the button so that the needle goes into the two holes toward the rear of the sewing machine, and then sew them in the same way.

Diagram illustrating a mechanical or electrical process with labeled components and directional arrows indicating transformation or change.

7 Turn the handwheel toward you (counterclockwise) to check that the needle correctly goes into the two holes of the button. Adjust the stitch width to the distance between the button holes.

BABY LOCK Sofia BL137A - Memo - 2

natural_image Illustration of a hand using a green tool to adjust a component, showing a circular knob (no text or symbols)

CAUTION

- When sewing, be sure that the needle does not touch the button, otherwise the needle may bend or break.

BABY LOCK Sofia BL137A - Memo - 3

Start sewing.

Set the sewing speed controller to the left (so that the speed will be slow).

BABY LOCK Sofia BL137A - Start sewing. - 1

natural_image Mechanical assembly diagram showing a lever mechanism with no visible text or symbols

The sewing machine automatically stops after sewing reinforcement stitches.

BABY LOCK Sofia BL137A - Start sewing. - 2

Note

- Do not press (Thread cutter button).

BABY LOCK Sofia BL137A - Note - 1

Pull the upper thread at the end of the stitching to the wrong side of the fabric, and then tie it with the bobbin thread.

Use scissors to cut the upper thread and the bobbin thread at the beginning of the stitching.

BABY LOCK Sofia BL137A - Pull the upper thread at the end of the stitching to the wrong side of the fabric, and then tie it with the bobbin thread. - 1

natural_image Simple line drawing of a tree with two branches and two leaves, no text or symbols present

BABY LOCK Sofia BL137A - Pull the upper thread at the end of the stitching to the wrong side of the fabric, and then tie it with the bobbin thread. - 2

When you have finished attaching the button, slide the drop feed lever to (to the right as seen from the rear of the machine) and turn the handwheel to raise the feed dogs.

BABY LOCK Sofia BL137A - Pull the upper thread at the end of the stitching to the wrong side of the fabric, and then tie it with the bobbin thread. - 3

Memo

● The drop feed lever is normally set to the right side.

Zipper Insertion

A zipper can be inserted.

Stitch NamePattern ApplicationStitch Width[mm (inch)]Stitch Length[mm (inch)]Presser Foot
Auto ManualAuto ManualManual
Straight stitch(center needle position)3[WSBD]Attaching zippersSewing concealed seams and pintucks3.5(1/8)0.0-7.0(0-1/4)2.5(3/32)0.2-5.0(1/64-3/16)

BABY LOCK Sofia BL137A - Zipper Insertion - 1

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

There are many methods for inserting zippers. The procedures for inserting a centered zipper and a side zipper are described below.

Inserting a centered zipper

Stitching is sewn on both pieces of fabric butted against each other.

① ② ③

① Right side of fabric
② Stitching
③ End of zipper opening

BABY LOCK Sofia BL137A - Inserting a centered zipper - 2

Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Inserting a centered zipper - 3

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Inserting a centered zipper - 4

Sew straight stitches up to the zipper opening.

With the right sides of the fabric facing each other, sew reverse stitches after reaching the zipper opening.

- For details, refer to "Basic stitching" (page 78).

BABY LOCK Sofia BL137A - Inserting a centered zipper - 5

Using a basting stitch, continue sewing to the edge of the fabric.

Diagram showing four numbered components of a structural joint or connection, with dashed lines indicating alignment or reference.

① Basting stitching
② Reverse stitches
③ Wrong side of fabric
④ End of zipper opening

BABY LOCK Sofia BL137A - Inserting a centered zipper - 7

Press open the seam allowance from the wrong side of the fabric.

BABY LOCK Sofia BL137A - Inserting a centered zipper - 8

natural_image Illustration of a hand holding a pen or stylus with a handle, no text or symbols present

① Wrong side of fabric

5 Align the seam with the center of the zipper, and then baste the zipper in place.

Diagram of a vertical structure with numbered components, likely illustrating a mechanical or structural assembly.

① Wrong side of fabric
② Basting stitching
③ Zipper

6 Remove about 5 cm (2 inches) from the end of the basting on the outside.

Technical diagram showing labeled components (①, ②, ③, ④) of a structural joint or panel assembly.

① Wrong side of fabric
② Zipper basting
③ Outside basting
④ 5 cm (2 inches)

7 Attach the presser foot holder to the right pin of zipper foot "I".

Diagram of a mechanical device with labeled parts, showing internal components and directional arrows.

① Pin on the right side
② Needle drop point

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

8 Select stitch ^3 .

- For details, refer to "Selecting stitching" (page 49).

JP # 8 3/67 W'--- W 3.5 mm --- 2.5 mm

! CAUTION

- When using zipper foot "I", be sure to select the straight stitch (center needle position), and slowly turn the handwheel toward you (counterclockwise) to check that the needle does not touch the presser foot. If a different stitch is selected or the needle hits the presser foot, the needle may bend or break.

9 Topstitch around the zipper.

Technical diagram showing sewing machine stitching process with numbered steps and directional arrows

① Stitching
② Right side of fabric
③ Basting stitching
④ End of zipper opening

CAUTION

- When sewing, be sure that the needle does not touch the zipper, otherwise the needle may bend or break.

10 Remove the basting stitching.

BABY LOCK Sofia BL137A - CAUTION - 1

Inserting a side zipper

Stitching is visible on only one piece of fabric. Use this type of zipper application for side openings and back openings.

① ② ③

① Stitching
② Right side of fabric
③ End of zipper opening

The following procedure will describe how to stitch on the left side, as shown in the illustration.

1 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Attach zigzag foot "J". - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

2 Sew straight stitches up to the zipper opening. With the right sides of the fabric facing each other, sew reverse stitches after reaching the zipper opening.

- For details, refer to "Basic stitching" (page 78).

3 Using a basting stitch, continue sewing to the edge of the fabric.

Diagram showing four numbered components or parts in a structural or mechanical assembly, with dashed lines and a green arrow indicating a specific point.

① Basting stitching
② Reverse stitches
③ Wrong side of fabric
④ End of zipper opening

4 Press open the seam allowance from the wrong side of the fabric.

BABY LOCK Sofia BL137A - Press open the seam allowance from the wrong side of the fabric. - 1

natural_image Illustration of a hand holding a sword with a numbered label (1) above it, no text or symbols present.

① Wrong side of fabric

5 Press the seam allowance so that the right side (the side that will not be stitched) has an extra 3 mm (1/8 inch).

BABY LOCK Sofia BL137A - Press the seam allowance so that the right side (the side that will not be stitched) has an extra 3 mm (1/8 inch). - 1

natural_image Diagram showing a corner joint with labeled parts (① and ②), no text or symbols present.

① Wrong side of fabric
② 3 mm (1/8 inch)

6 Align the zipper teeth with the pressed edge of the fabric having the extra 3 mm (1/8 inch), and then baste or pin the zipper in place.

Diagram showing a layered structure with labeled components, including numbered parts ① and ②.

① Zipper teeth
② Basting stitching

7 Attach the presser foot holder to the right pin of zipper foot "I".

If the stitching will be sewn on the right side, attach the presser foot holder to the left pin of the zipper foot.

Technical diagram of a mechanical device with labeled parts ① and ②

① Pin on the right side
② Needle drop point

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

8 Select stitch ^3 .

- For details, refer to "Selecting stitching" (page 49).

JP 3/67 W 3.5 mm -- 2.5 mm

! CAUTION

- When using zipper foot "I", be sure to select the straight stitch (center needle position), and slowly turn the handwheel toward you (counterclockwise) to check that the needle does not touch the presser foot. If a different stitch is selected or the needle hits the presser foot, the needle may bend or break.

9 Sew the zipper to the piece of fabric with the extra 3 mm (1/8 inch), starting from the base of the zipper.

BABY LOCK Sofia BL137A - ! CAUTION - 1

natural_image Diagram showing a vertical pipe or channel with a downward arrow indicating flow direction (no text or symbols present)

! CAUTION

●When sewing, be sure that the needle does not touch the zipper, otherwise the needle may bend or break.

10 When you are about 5 cm (2 inches) from the end of the zipper, stop the sewing machine with the needle lowered (in the fabric), and then raise the presser foot lever.

11 Open the zipper and continue sewing.

BABY LOCK Sofia BL137A - ! CAUTION - 1

natural_image Technical line drawing of a sewing machine needle stitching fabric (no text or symbols)

12 Close the zipper, turn over the fabric, and then baste the other side of the zipper to the fabric.

BABY LOCK Sofia BL137A - ! CAUTION - 2

natural_image Diagram showing two views of a roof or panel installation with a green curved arrow indicating rotation, and a numbered step labeled ① (no text or symbols present)

① Basting stitching

13 Attach the presser foot holder to the left pin of zipper foot "I". If the presser foot holder was attached to the left pin in step 7, change it to the right pin.

Diagram of a laboratory apparatus with labeled parts ① and ②, showing a test tube and tubing setup.

① Pin on the left side ② Needle drop point

14 Topstitch around the zipper.

Sew reverse stitches at the end of the zipper opening and align the zipper teeth with the side of the presser foot.

① ② ③ ④ ⑤

① Right side of fabric
② End of zipper opening
③ Reverse stitches
④ Beginning of stitching
⑤ Basting stitching

BABY LOCK Sofia BL137A - Topstitch around the zipper. - 2

CAUTION

  • When sewing, be sure that the needle does not touch the zipper, otherwise the needle may bend or break.
    15 When you are about 5 cm (2 inches) from the end of the zipper, stop the sewing machine with the needle lowered (in the fabric), and then raise the presser foot lever.
    16 Remove the basting stitching, open the zipper, and then continue sewing.

BABY LOCK Sofia BL137A - CAUTION - 1

natural_image Mechanical sewing machine needle stitching fabric (no text or symbols visible)

Sewing Stretch Fabrics and Elastic Tape

Stretch fabrics can be sewn and elastic tape can be attached.

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
Auto Manual Auto Manual
Triple stretch stitch[X074]Stretch fabrics0.0(0)0.0-7.0(0-1/4)2.5(3/32)1.5-4.0(1/16-3/16)J
Stretch stitchBABY LOCK Sofia BL137A - Sewing Stretch Fabrics and Elastic Tape - 1Stretch fabrics1.0(1/16)1.0-3.0(1/16-1/8)2.5(3/32)1.0-4.0(1/16-3/16)
2-point zigzag stitchBABY LOCK Sofia BL137A - Sewing Stretch Fabrics and Elastic Tape - 2Attaching elastic5.0(3/16)1.5-7.0(1/16-1/4)1.0(1/16)0.2-4.0(1/64-3/16)
3-point zigzag stitchBABY LOCK Sofia BL137A - Sewing Stretch Fabrics and Elastic Tape - 3
Elastic-attaching stitchBABY LOCK Sofia BL137A - Sewing Stretch Fabrics and Elastic Tape - 4Attaching elastic to stretch fabrics4.0(3/16)0.0-7.0(0-1/4)

Observe the corresponding precautions when performing each of the following stitching operations.

BABY LOCK Sofia BL137A - Sewing Stretch Fabrics and Elastic Tape - 5

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

Stretch stitching

1

Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Stretch stitching - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

2

Select stitch ^4 or ^5 .

- For details, refer to "Selecting stitching" (page 49).

JP + 8 5/67 W--- W/1.0mm --- 2.5mm

3

Sew the fabric without stretching it.

BABY LOCK Sofia BL137A - Stretch stitching - 3

natural_image Mechanical assembly diagram showing a sewing machine with a green zigzag line indicating a motion path (no text or symbols present)

Elastic attaching

When elastic tape is attached to the cuff or waist of a piece of clothing, the finished dimensions will be that of the stretched elastic tape. Therefore, it is necessary that a suitable length of the elastic tape be used.

1 Pin the elastic tape to the wrong side of the fabric.

Pin the elastic tape to the fabric at a few points to make sure that the tape is uniformly positioned on the fabric.

Diagram showing two labeled parts (① and ②) of a biological or mechanical structure with directional arrows indicating flow or movement.

① Elastic tape
② Pin

2 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Attach zigzag foot "J". - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

3 Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

J9 9/67 W--- W 5.0 mm --- 1.0 mm J9 34/67 W--- W 4.0 mm --- 1.0 mm

4 Sew the elastic tape to the fabric while stretching the tape so that it is the same length as the fabric.

While pulling the fabric behind the presser foot with your left hand, pull the fabric at the pin nearest the front of the presser foot with your right hand.

BABY LOCK Sofia BL137A - Sew the elastic tape to the fabric while stretching the tape so that it is the same length as the fabric. - 1

natural_image Two-step illustration showing a sewing machine stitching fabric, with no text or symbols present.

CAUTION

- When sewing, be sure that the needle does not touch any pins, otherwise the needle may bend or break.

Appliqué, Patchwork and Quilt Stitching

The stitches that can be used for sewing appliqués, patchwork and quilts are described below.

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
AutoManual Auto Manual
Zigzag stitchBABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 1Attaching appliqués (center baseline/reverse stitching)3.5 (1/8)0.0-7.0 (0-1/4)1.4 (1/16)0.0-4.0 (0-3/16)J
BABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 2Appliqué quilting, free-motion quilting, satin stitching
Appliqué stitchBABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 3Attaching appliqués2.5-7.0 (3/32-1/4)2.5 (3/32)1.6-4.0 (1/16-3/16)
BABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 4Attaching appliqués and binding1.5 (1/16)0.5-3.5 (1/32-1/8)1.8 (1/16)1.0-4.0 (1/16-3/16)
Piecing straight stitchBABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 5Piecing straight stitching (with a seam allowance of 6.5 mm (1/4 inch) from the right edge of the presser foot)5.5 (3/16)0.0-7.0 (0-1/4)2.0 (1/16)0.2-5.0 (1/64-3/16)
BABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 6Piecing straight stitching (with a seam allowance of 6.5 mm (1/4 inch) from the left edge of the presser foot)1.5 (1/16)
Joining stitchBABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 7Patchwork stitching4.0 (3/16)1.2 (1/16)0.2-4.0 (1/64-3/16)
BABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 85.0 (3/16)2.5-7.0 (3/32-1/4)2.5 (3/32)1.0-4.0 (1/16-3/16)
[AGZW]0.0-7.0 (0-1/4)1.2 (1/16)0.2-4.0 (1/64-3/16)
Mock hand quilting stitchBABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 9Straight stitch quilting that looks hand quilted0.0 (0)2.5 (3/32)1.0-4.0 (1/16-3/16)
Quilting stipplingBABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 10Stippling7.0 (1/4)1.0-7.0 (1/16-1/4)1.6 (1/16)

BABY LOCK Sofia BL137A - Appliqué, Patchwork and Quilt Stitching - 11

Memo

● Patterns showing a "Q" on the LCD are for quilting and those showing a "P" are for piecing.

BABY LOCK Sofia BL137A - Memo - 1

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if ⏚/ ⏻ (Start/stop button) is accidentally pressed and the machine starts sewing.

Appliqué stitching

1 Cut out the appliqué, leaving a seam allowance of between 3 and 5 mm (1/8 and 3/16 inch).

BABY LOCK Sofia BL137A - Appliqué stitching - 1

natural_image Simple heart-shaped diagram with a numbered label pointing to the bottom-left corner (no text or symbols on the shape itself)

① Seam allowance

2 Place a pattern made of thick paper or stabilizer on the back of the appliqué, and then fold over the seam allowance using an iron.

BABY LOCK Sofia BL137A - Appliqué stitching - 2

natural_image Simple line drawing of a heart-shaped object with a small protrusion on top (no text or symbols)

3 Turn the fabric over, and then baste or fuse it onto the fabric that it will be attached to.

BABY LOCK Sofia BL137A - Appliqué stitching - 3

natural_image Simple heart-shaped outline with dashed outline and label (1) pointing to one side, no text or symbols present.

① Basting stitching

4 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Appliqué stitching - 4

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

5 Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

3.5 mm 1.4 mm

JG + 8 19/67 W 3.5 mm -- 2.5 mm

6 Turn the handwheel toward you (counterclockwise), and then begin sewing around the edge of the appliqué, making sure that the needle drops just outside of the appliqué.

BABY LOCK Sofia BL137A - Appliqué stitching - 7

natural_image Diagram of a sewing machine needle insertion into a slot, showing needle positioning and cutting tool (no text or symbols)

BABY LOCK Sofia BL137A - Appliqué stitching - 8

natural_image Blank gray document page with a vertical green line on the right edge (no text or symbols)

When sewing around corners, stop the machine with the needle in the fabric just outside of the appliqué, raise the presser foot lever, and then turn the fabric as needed to change the sewing direction.

Diagram illustrating sewing machine operation with green arrows indicating direction and motion, showing mechanical components and fabric movement.

Patchwork (crazy quilt) stitching

1 Fold the edge of the top piece of fabric and place it over the lower piece.

2 Sew the two pieces of fabric together so the pattern spans over both pieces.

BABY LOCK Sofia BL137A - Patchwork (crazy quilt) stitching - 1

natural_image Mechanical sewing machine diagram showing needle insertion and cutting path (no text or symbols)

BABY LOCK Sofia BL137A - Patchwork (crazy quilt) stitching - 2

natural_image Abstract geometric diagram with green lines and a shaded triangle, no text or symbols present

Piecing

Sewing together two pieces of fabric is called "piecing". The fabric pieces should be cut with a 6.5 mm (1/4 inch) seam allowance.

Sew a piecing straight stitch 6.5 mm (1/4 inch) from either the right side or the left side of the presser foot.

1 Baste or pin along the seam allowance of the fabric that you wish to piece together.

2 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Piecing - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

3 Select stitch ^21 or ^22 .

- For details, refer to "Selecting stitching" (page 49).

J + 8 12/67 W 1.5 mm - 2.0 mm

BABY LOCK Sofia BL137A - Piecing - 3

Memo

● The piecing straight stitch shows a "P" on the LCD.

4 Sew with the side of the presser foot aligned with the edge of the fabric.

■ For a seam allowance on the right side

Align the right side of the presser foot with the edge of the fabric, and sew using stitch 21.

① J

① 6.5 mm (1/4 inch)

■ For a seam allowance on the left side

Align the left side of the presser foot with the edge of the fabric, and sew using stitch 22.

① J

① 6.5 mm (1/4 inch)

BABY LOCK Sofia BL137A - Memo - 3

Memo

● To change the width of the seam allowance (needle position), refer to "Changing the needle position" (page 79).

Quilting

Sandwiching batting between the top and bottom layers of fabric is called "quilting". Quilts can easily be sewn using the optional walking foot and the quilting guide.

BABY LOCK Sofia BL137A - Quilting - 1
Walking foot

BABY LOCK Sofia BL137A - Quilting - 2
Quilting guide

BABY LOCK Sofia BL137A - Quilting - 3

Note

  • When sewing with the walking foot, sew at a speed between slow and medium.
  • When quilting, use a 90/14 home sewing machine needle.
  • The walking foot can only be used with straight or zigzag stitch patterns. Reverse stitches cannot be sewn with the walking foot. Only select straight or zigzag stitch patterns with reinforcement stitches. For details, refer to "Stitch Setting Chart"(page 70).

BABY LOCK Sofia BL137A - Note - 1

Baste the fabric to be quilted.

BABY LOCK Sofia BL137A - Note - 2

Remove the presser foot and the presser foot holder.

- For details, refer to "Removing and attaching the presser foot holder" (page 45).

BABY LOCK Sofia BL137A - Note - 3

Hook the connecting fork of the walking foot onto the needle clamp screw.

Technical diagram of a mechanical assembly with labeled parts ① and ②

① Connecting fork

② Needle clamp screw

BABY LOCK Sofia BL137A - Note - 5

Lower the presser foot lever, insert the presser foot holder screw, and then tighten the screw with the screwdriver.

Technical diagram showing mechanical assembly with labeled component ① and directional arrow indicating motion

① Presser foot holder screw

The walking foot is attached.

BABY LOCK Sofia BL137A - Note - 7

CAUTION

●Be sure to securely tighten the screw with the screwdriver, otherwise the needle may touch the presser foot, causing it to bend or break.
●Before starting to sew, slowly turn the handwheel toward you (counterclockwise) and check that the needle does not touch the presser foot. If the needle hits the presser foot, the needle may bend or break.

BABY LOCK Sofia BL137A - CAUTION - 1

Select a stitch.

- For details, refer to "Selecting stitching" (page 49).

BABY LOCK Sofia BL137A - CAUTION - 2

Place one hand on each side of the presser foot, and then evenly guide the fabric while sewing.

BABY LOCK Sofia BL137A - CAUTION - 3

natural_image Illustration of hands operating a sewing machine with a green dashed line indicating the needle (no text or symbols present)

■Using the optional quilting guide

Use the quilting guide to sew parallel stitches that are equally spaced.

BABY LOCK Sofia BL137A - ■Using the optional quilting guide - 1

① Insert the stem of the quilting guide into the hole at the rear of the walking foot or presser foot holder.

□ Walking foot

BABY LOCK Sofia BL137A - ① Insert the stem of the quilting guide into the hole at the rear of the walking foot or presser foot holder. - 1

natural_image Technical line drawing of a mechanical clamp or bracket (no text or symbols)

□ Presser foot holder

BABY LOCK Sofia BL137A - ① Insert the stem of the quilting guide into the hole at the rear of the walking foot or presser foot holder. - 2

2 Adjust the stem of the quilting guide so that the guide aligns with the seam that has already been sewn.

BABY LOCK Sofia BL137A - Adjust the stem of the quilting guide so that the guide aligns with the seam that has already been sewn. - 1

natural_image Technical line drawing of a sewing machine needle and foot assembly (no text or symbols)

BABY LOCK Sofia BL137A - Adjust the stem of the quilting guide so that the guide aligns with the seam that has already been sewn. - 2

Memo

● The optional quilting guide is available through Baby Lock retailers.

Free-motion quilting

With free-motion quilting, lower the feed dogs (using the drop feed lever) so that the fabric can be moved freely in any direction.

When free-motion quilting, use the following instructions with the optional free-motion open toe quilting foot "O" (XE0767-001).

BABY LOCK Sofia BL137A - Free-motion quilting - 1

BABY LOCK Sofia BL137A - Free-motion quilting - 2

CAUTION

- Be sure to use the optional free-motion open toe quilting foot "O" when making free-motion quilting.

BABY LOCK Sofia BL137A - CAUTION - 1

Remove the presser foot and the presser foot holder.

- Refer to "Removing and attaching the presser foot holder" (page 45).

BABY LOCK Sofia BL137A - CAUTION - 2

Attach free-motion quilting foot "O" by positioning the pin of the quilting foot above the needle clamp screw and aligning the lower-left of the quilting foot and the presser bar.

Technical diagram of a mechanical device with numbered components and directional arrow indicating rotation or movement

① Pin
② Needle clamp screw
③ Presser bar

BABY LOCK Sofia BL137A - CAUTION - 4

Note

● Make sure that the quilting foot is not slanted.

BABY LOCK Sofia BL137A - Note - 1

Hold the quilting foot "O" in place with your right hand, and then tighten the presser foot holder screw using the screwdriver in your left hand.

Technical diagram showing a mechanical assembly with labeled component ① and directional arrow indicating rotation or movement.

① Presser foot holder screw

BABY LOCK Sofia BL137A - Note - 3

CAUTION

●Be sure to securely tighten the screw with the screwdriver. Otherwise the needle may touch the presser foot, causing it to bend or break.

BABY LOCK Sofia BL137A - CAUTION - 1

Slide the drop feed lever, located at the rear of the machine on the base, to the left as seen from the rear of the machine).

Diagram showing a device with labeled components and directional arrows, including a circled inset view.

① Drop feed lever (as seen from the rear of the machine)

The feed dogs are lowered.

BABY LOCK Sofia BL137A - CAUTION - 3

Turn on the sewing machine, and then select a stitch ^3 or .

- For details, refer to "Selecting stitching" (page 49).

BABY LOCK Sofia BL137A - CAUTION - 4

Use both hands to stretch the fabric taut, and then move the fabric at a consistent pace in order to sew uniform stitches roughly 2.0-2.5mm (approx. 1/16 - 3/32 inch) in length.

Reinforcement stitches are sewn at the beginning and end of sewing.

Diagram illustrating sewing machine needle positioning with labeled parts and directional arrows

① Stitch

BABY LOCK Sofia BL137A - CAUTION - 6

After sewing is finished, slide the drop feed lever to (to the right as seen from the rear of the machine) and turn the handwheel to raise the feed dogs.

BABY LOCK Sofia BL137A - CAUTION - 7

Memo

● The drop feed lever is normally set to the right side.

Reinforcement Stitching

Reinforce points that will be subject to strain, such as sleeve holes, inseams and pocket corners.

Stitch Name Pattern ApplicationStitch Width [mm (inch)]Stitch Length [mm (inch)]Presser Foot
Auto Manual Auto Manual
Triple stretch stitchBABY LOCK Sofia BL137A - Reinforcement Stitching - 1Reinforcing the seams of sleeves and inseams0.0(0)0.0-7.0(0-1/4)2.5(3/32)1.5-4.0(1/16-3/16)J
Bar tack stitchBABY LOCK Sofia BL137A - Reinforcement Stitching - 2Reinforcing the ends of openings, such as the corners of pockets2.0(1/16)1.0-3.0(1/16-1/8)0.4(1/64)0.3-1.0(1/64-1/16)A
Darning stitchBABY LOCK Sofia BL137A - Reinforcement Stitching - 3Darning mediumweight fabrics7.0(1/4)2.5-7.0(3/32-1/4)2.0(1/16)0.4-2.5(1/64-3/32)
BABY LOCK Sofia BL137A - Reinforcement Stitching - 4Darning thick fabrics

BABY LOCK Sofia BL137A - Reinforcement Stitching - 5

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

Triple stretch stitching

Use triple stretch stitching to reinforce sleeve holes and inseams.

1

Attach zigzag foot "J".

BABY LOCK Sofia BL137A - 1 - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

2

Select stitch ^4

- For details, refer to "Selecting stitching" (page 49).

JIP + 8 4/67 W 0.0 mm -- 2.5 mm

3

Start sewing.

- For details, refer to "Starting to sew" (page 51).

Bar tack stitching

Bar tacks are used to reinforce points subject to strain, such as pocket corners and openings. As an example, the procedure for sewing bar tacks at pocket corners is described below.

BABY LOCK Sofia BL137A - Bar tack stitching - 1

natural_image Simple geometric diagram showing a rounded rectangle with dashed lines and two green screw-like symbols at top corners (no text or labels)

1 Determine the desired length of the bar tack. Set the button guide plate on buttonhole foot "A" to the desired length. (The distance between the markings on the presser foot scale is 5 mm (3/16 inch).)

Technical diagram showing a spring-loaded device with labeled components and dimensional annotations

① Presser foot scale
② Length of bar tack
③ 5 mm (3/16 inch)

BABY LOCK Sofia BL137A - Bar tack stitching - 3

Memo

● A bar tack with a maximum length of about 28 mm (1-1/8 inches) can be sewn.

Attach buttonhole foot "A".

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

3 Select stitch 60.

- For details, refer to "Selecting stitching" (page 49).

W 2.0 mm 0.4 mm

4 Position the fabric so that the opening of the pocket faces toward you, and then lower the presser foot lever so that the needle drops 2 mm (1/16 inch) in front of the pocket opening.

Diagram showing a mechanical or fluidic component with labeled dimension '①' and a pointed tip.

① 2 mm (1/16 inch)

• Pass the upper thread down through the hole in the presser foot.

BABY LOCK Sofia BL137A - Memo - 3

natural_image Mechanical assembly diagram showing a lever mechanism with no visible text or symbols

BABY LOCK Sofia BL137A - Memo - 4

Note

- When lowering the presser foot, do not push in the front of the presser foot, otherwise the bar tack will not be sewn with the correct size.

Technical diagram showing mechanical assembly with cross-sectional view and labeled component A, marked with number ①

① Do not reduce the gap.

5 Pull down the buttonhole lever as far as possible.

BABY LOCK Sofia BL137A - Note - 2

natural_image Illustration of a sewing machine needle being adjusted, showing the handle and base (no text or symbols)

① Buttonhole lever

The buttonhole lever is positioned behind the bracket on the buttonhole foot.

Technical diagram showing two labeled mechanical components with numbered annotations

① Buttonhole lever
② Bracket

Gently hold the end of the upper thread in your left hand, and then start sewing.

BABY LOCK Sofia BL137A - Note - 4

natural_image Illustration of a sewing machine needle stitching a fabric (no text or symbols visible)

Once sewing is completed, the sewing machine automatically sews reinforcement stitches, then stops.

7 Raise the presser foot lever, remove the fabric, and then cut the threads.

8 Raise the buttonhole lever to its original position.

BABY LOCK Sofia BL137A - Note - 5

Memo

- If the fabric does not feed, for example, because it is too thick, increase the stitch length. For details, refer to "Adjusting the stitch length" (page 59).

Darning

Fabric that has been torn can be darned.

Darning is sewn as shown below.

BABY LOCK Sofia BL137A - Darning - 1

flowchart
graph LR
    A["Raw Material Input"] --> B["Step 1: Input →"]
    B --> C["Step 2: Input →"]
    C --> D["Step 3: Input →"]
    D --> E["Step 4: Input →"]
    E --> F["Step 5: Input →"]
    F --> G["Step 6: Input →"]
    G --> H["Final Product Output"]
    style A fill:#f9f,stroke:#333
    style H fill:#bbf,stroke:#333

① Reinforcement stitching

1 Determine the desired length of the darning. Set the button guide plate on buttonhole foot "A" to the desired length. (The distance between the markings on the presser foot scale is 5 mm (3/16 inch).)

Technical diagram showing a grid-patterned component with labeled parts and dimensional annotations

① Presser foot scale
② Length of darning
③ 5 mm (3/16 inch)
④ 7 mm (1/4 inch)

BABY LOCK Sofia BL137A - Darning - 3

Memo

● A bar tack with a maximum length of about 28 mm (1-1/8 inches) can be sewn.

BABY LOCK Sofia BL137A - Memo - 1

Attach buttonhole foot "A".

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Attach buttonhole foot "A". - 1

Select stitch ^58 or ^59 .

- For details, refer to "Selecting stitching" (page 49).

7.0 mm -- 2.0 mm

BABY LOCK Sofia BL137A - Attach buttonhole foot "A". - 3

Position the fabric so that the needle is 2 mm (1/16 inch) in front of the area to be darned, and then lower the presser foot lever.

Diagram showing two labeled parts (① and ②) with directional arrows and a vertical line, likely illustrating a physical or engineering concept.

① Tear
② 2 mm (1/16 inch)

• Pass the upper thread down through the hole in the presser foot.

BABY LOCK Sofia BL137A - Attach buttonhole foot "A". - 5

natural_image Technical line drawing of a mechanical assembly with no visible text or symbols

BABY LOCK Sofia BL137A - Attach buttonhole foot "A". - 6

Memo

- When lowering the presser foot, do not push in the front of the presser foot, otherwise the darning will not be sewn with the correct size.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Mechanical assembly diagram showing a tool inserted into a component, with no visible text or symbols

BABY LOCK Sofia BL137A - Memo - 2

① Do not reduce the gap.

BABY LOCK Sofia BL137A - Memo - 3

Pull down the buttonhole lever as far as possible.

Technical diagram showing a hand operating a sewing machine with labeled parts and a green arrow indicating motion direction.

① Buttonhole lever

The buttonhole lever is positioned behind the bracket on the buttonhole foot.

Technical diagram showing two labeled mechanical components with numbered annotations

① Buttonhole lever

② Bracket

BABY LOCK Sofia BL137A - Memo - 6

Gently hold the end of the upper thread in your left hand, and then start sewing.

BABY LOCK Sofia BL137A - Memo - 7

natural_image Illustration of a mechanical assembly with a hand operating a tool (no text or symbols visible)

Once sewing is completed, the sewing machine automatically sews reinforcement stitches, then stops.

BABY LOCK Sofia BL137A - Memo - 8

Raise the presser foot lever, remove the fabric, and then cut the threads.

BABY LOCK Sofia BL137A - Memo - 9

Raise the buttonhole lever to its original position.

BABY LOCK Sofia BL137A - Memo - 10

Memo

- If the fabric does not feed, for example, because it is too thick, increase the stitch length. For details, refer to "Adjusting the stitch length" (page 59).

BABY LOCK Sofia BL137A - Memo - 1

Eyelet Stitching

Eyelets, such as those on belts, can be sewn. Three sizes of eyelets are possible: 7 mm, 6 mm and 5 mm (1/4, 15/64 and 3/16 inch).

Stitch Name Pattern ApplicationStitch Width[mm (inch)]Stitch Length[mm (inch)]Presser Foot
Auto Manual Auto Manual
Eyelet stitch62Sewing eyelets, for example, on belts7.0(1/4)7.0, 6.0 or5.0(1/4, 15/64or 3/16)7.0(1/4)7.0, 6.0 or5.0(1/4, 15/64or 3/16)N

BABY LOCK Sofia BL137A - Eyelet Stitching - 1

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if (Start/stop button) is accidentally pressed and the machine starts sewing.

1 Attach monogramming foot "N".

BABY LOCK Sofia BL137A - CAUTION - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

2 Select stitch ^62 .

- For details, refer to "Selecting stitching" (page 49).

NE + 8 S S 62/67 W--- W 7.0 mm -- 7.0 mm

3 Adjust either the stitch width or the stitch length to select the desired eyelet size.

- For details, refer to "Adjusting the stitch width" (page 57) and "Adjusting the stitch length" (page 59).

BABY LOCK Sofia BL137A - CAUTION - 3
7mm

BABY LOCK Sofia BL137A - CAUTION - 4
6mm

BABY LOCK Sofia BL137A - CAUTION - 5
5mm

4 Lower the needle into the fabric at the beginning of the stitching, and then lower the presser foot lever.

BABY LOCK Sofia BL137A - CAUTION - 6

5 Start sewing.

Once sewing is completed, the sewing machine automatically sews reinforcement stitches, then stops.

6 Use the eyelet punch to cut a hole in the center of the eyelet.

When using the eyelet punch, place thick paper or some other protective sheet under the fabric before punching the hole in the fabric.

BABY LOCK Sofia BL137A - CAUTION - 7

natural_image Hand holding a cylindrical object with a green circular mark on a surface (no text or symbols)

BABY LOCK Sofia BL137A - CAUTION - 8

Memo

- If thin thread is used, the stitching may be too open. If this occurs, sew the eyelet twice before removing the fabric, one on top of the other.

Decorative Stitching

The utility stitches contain the following decorative stitches.

Stitch Name Pattern ApplicationStitch Width[mm (inch)]Stitch Length[mm (inch)]Presser Foot
Auto Manual Auto Manual
Fagoting stitch32Sewing two pieces of fabric together across an open seam5.0(3/16)0.0-7.0(0-1/4)2.5(3/32)1.0-4.0(1/16-3/16)J
332.5-7.0(3/25-1/4)
Joining stitch28Decorative bridging stitches4.0(3/16)0.0-7.0(0-1/4)1.2(1/16)0.2-4.0(1/64-3/16)
295.0(3/16)2.5-7.0(3/32-1/4)2.5(3/32)1.0-4.0(1/16-3/16)
300.0-7.0(0-1/4)1.2(1/16)0.2-4.0(1/64-3/16)
Shell tuck stitch20Shell tuck stitching on collars and curves4.0(3/16)2.5(3/32)
Smocking stitch31Smocking fabrics to add texture and elasticity5.0(3/16)1.6(1/16)1.0-4.0(1/16-3/16)
322.5(3/32)
332.5-7.0(3/25-1/4)
Satin scallop stitch27Scallop stitching0.5(1/32)0.1-1.0(1/64-3/16)N
Decorative stitch39Lace sewing, decorative hemming, heirloom stitching, etc.3.5(1/8)1.5-7.0(1/16-1/4)2.5(3/32)1.6-4.0(1/16-3/16)
406.0(15/64)3.0(1/8)1.5-4.0(1/16-3/16)
41Decorative hemming and heirloom stitching, etc. on thin, mediumweight and plain weave fabrics5.0(3/16)3.5(1/8)
424.0(3/16)
432.5(3/32)
442.0(1/16)
45Decorative hemming, ribbon threading, heirloom stitching, etc.3.0(1/8)
Decorative stitchBABY LOCK Sofia BL137A - Decorative Stitching - 1Heirloom stitching, etc.6.0(15/64)1.5-7.0(1/16-1/4)1.6(1/16)1.0-4.0(1/16-3/16)N
47(CA3D)5.0(3/16)
[STX4]Decorative stitching4.0(3/16)0.0-7.0(0-1/4)3.0(1/8)2.0-4.0(1/16-3/16)J
[TOWD]2.5(3/32)1.0-4.0(1/16-3/16)
[BRXY]5.5(7/32)1.6(1/16)
[TBX8]5.0(3/16)1.5-7.0(1/16-1/4)1.0(1/16)0.2-4.0(1/64-3/16)N

BABY LOCK Sofia BL137A - Decorative Stitching - 2

CAUTION

- Be sure to turn off the main power before replacing the presser foot. Otherwise, injuries may occur if ⏻/💡 (Start/stop button) is accidentally pressed and the machine starts sewing.

Fagoting

Stitching across an open seam is called "fagoting". It is used on blouses and children's clothing. This stitch is more decorative when thicker thread is used.

BABY LOCK Sofia BL137A - Fagoting - 1

Use an iron to fold the two pieces of fabric along their seams.

BABY LOCK Sofia BL137A - Fagoting - 2

Baste the two pieces of fabric, separated by about 4 mm (3/16 inch), onto thin paper or a sheet of water-soluble stabilizer.

- If you draw a line down the middle of the thin paper or water-soluble stabilizer, sewing is easier.

Technical diagram showing a cross-sectional view of a mechanical or structural component with labeled parts ①, ②, and ③.

① Thin paper or water soluble stabilizer
② Basting stitching
③ 4 mm (3/16 inch)

BABY LOCK Sofia BL137A - Fagoting - 4

Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Fagoting - 5

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Fagoting - 6

Select stitch ^32 or ^33 .

- For details, refer to "Selecting stitching" (page 49).

JG 32/67 W 5.0 mm -- 2.5 mm

BABY LOCK Sofia BL137A - Fagoting - 8

Set the stitch width to 7.0 mm (1/4 inch).

- For details, refer to "Adjusting the stitch width" (page 57).

BABY LOCK Sofia BL137A - Fagoting - 9

Sew with the center of the presser foot aligned along the center of the two pieces of fabric.

BABY LOCK Sofia BL137A - Fagoting - 10

natural_image Simple line drawing of a mechanical device with a handle and base (no text or symbols)

BABY LOCK Sofia BL137A - Fagoting - 11

natural_image Mechanical sewing machine needle and base assembly (no text or symbols visible)

BABY LOCK Sofia BL137A - Fagoting - 12

After sewing is finished, remove the paper.

Scallop stitching

The wave-shaped repeating pattern that looks like shells is called "scalloping". It is used on the collars of blouses and to decorate the edges of projects.

BABY LOCK Sofia BL137A - Scallop stitching - 1

Attach monogramming foot "N".

BABY LOCK Sofia BL137A - Scallop stitching - 2

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Scallop stitching - 3

Select stitch ^27 .

- For details, refer to "Selecting stitching" (page 49).

N W 5.0 mm -- 0.5 mm

BABY LOCK Sofia BL137A - Scallop stitching - 5

Stitch along the edge of the fabric, making sure not to sew directly on the edge of the fabric.

BABY LOCK Sofia BL137A - Scallop stitching - 6

natural_image Mechanical assembly diagram showing a clamping mechanism with no visible text or symbols

BABY LOCK Sofia BL137A - Scallop stitching - 7

Memo

- For better results, apply spray starch onto the fabric and press with a hot iron before it is sewn.

BABY LOCK Sofia BL137A - Memo - 1

Trim along the stitches.

BABY LOCK Sofia BL137A - Memo - 2

natural_image Illustration of a hand holding a curved object with a green patch, possibly a tool or device (no text or symbols visible)

Be careful not to cut the stitches.

BABY LOCK Sofia BL137A - Memo - 3

Smocking

The decorative stitch created by stitching or embroidering over gathers is called "smocking". It is used to decorate the front of blouses or cuffs. The smocking stitch adds texture and elasticity to fabric.

1 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Attach zigzag foot "J". - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

2 Select the straight stitch, and then adjust the stitch length to 4.0 mm (3/16 inch) and loosen the thread tension.

  • Pull up the bobbin thread. For details, refer to "When pulling up the bobbin thread may be necessary" (page 29).
  • For details, refer to "Adjusting the stitch length" (page 59) and "Adjusting the thread tension" (page 59).

3 Sew parallel stitching at intervals of 1 cm (3/8 inch).

BABY LOCK Sofia BL137A - Sew parallel stitching at intervals of 1 cm (3/8 inch). - 1

natural_image Diagram showing parallel green lines on a gray surface with an arrow indicating direction (no text or symbols)

① 1cm (3/8 inch)
At the end of the stitching, the thread is pulled out about 5 cm (2 inches).

BABY LOCK Sofia BL137A - Sew parallel stitching at intervals of 1 cm (3/8 inch). - 2

Note

- Do not use reverse/reinforcement stitching or thread cutting.

4 Pull the bobbin threads to create gathers. Smooth the gathers by ironing them.

BABY LOCK Sofia BL137A - Pull the bobbin threads to create gathers. Smooth the gathers by ironing them. - 1

natural_image Illustration of hands holding a textured surface with green lines indicating fiber or fiber strands (no text or symbols)

5 Select stitch ^31 , ^32 , or ^33 .

- For details, refer to "Selecting stitching" (page 49).

JG 31/67 W'--- W' 5.0 mm -- 1.6 mm

6 Stitch between the straight stitches.

BABY LOCK Sofia BL137A - Stitch between the straight stitches. - 1

natural_image Diagram of a mechanical or fluidic component with green mesh lines, no text or symbols present

7 Pull out the threads for the straight stitches.

BABY LOCK Sofia BL137A - Pull out the threads for the straight stitches. - 1

natural_image Illustration of hands performing a sewing or sewing process with a green arrow indicating the motion (no text or symbols present)

Shell tuck stitching

The gathers that look like shells are called "shell tucks". They are used to decorate trims, the front of blouses or cuffs made of thin fabrics.

1 Fold the fabric along the bias.

BABY LOCK Sofia BL137A - Fold the fabric along the bias. - 1

natural_image Simple geometric diagram showing a shaded triangular region with an arrow indicating direction (no text or symbols)

2 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Attach zigzag foot "J". - 1

- For details, refer to "Replacing the presser foot" (page 43).

3 Select stitch ^20 , and then increase the thread tension.

- For details, refer to "Selecting stitching" (page 49) and "Adjusting the thread tension" (page 59).

J + 20/67 W 4.0 mm 2.5 mm

4 Sew while making sure that the needle drops slightly off the edge of the fabric.

Technical diagram showing a sewing machine with labeled component 'J' and a close-up view of the mechanism.

① Needle drop point

5 Unfold the fabric, and then iron the tucks down to one side.

BABY LOCK Sofia BL137A - Unfold the fabric, and then iron the tucks down to one side. - 1

natural_image Repeating pattern of wavy black lines with dashed green outlines on a light gray background (no text or symbols)

Joining

Decorative bridging stitches can be sewn over the seam allowance of joined fabrics. This is used when making a crazy quilt.

1 Attach zigzag foot "J".

BABY LOCK Sofia BL137A - Attach zigzag foot "J". - 1

- For details, refer to "Replacing the presser foot" (page 43).

2 Sew together the right sides of the two pieces of fabric, and then open up the seam allowances.

Technical diagram showing three labeled regions (①, ②, ③) with a shaded triangular section and a dashed line indicating a reference or measurement.

① Wrong side of fabric
② 7 mm (1/4 inch) seam allowance
③ Straight stitch

3 Select stitch ^28 29, or 30

- For details, refer to "Selecting stitching" (page 49).

J W/4.0 mm -- 1.2 mm

4 Turn the fabric over so that the right side faces up, and then sew over the seam with the center of the presser foot aligned with the seam.

BABY LOCK Sofia BL137A - Turn the fabric over so that the right side faces up, and then sew over the seam with the center of the presser foot aligned with the seam. - 1

natural_image Mechanical assembly diagram showing a sewing machine with levers and guide rails (no text or labels)

① Right side of fabric

Heirloom stitching

When sewing with the wing needle, the needle holes are enlarged, creating a lace-like decorative stitch. This is used to decorate hems and tablecloths on thin or medium weight fabrics in addition to plain weave fabrics.

BABY LOCK Sofia BL137A - Heirloom stitching - 1

Note

- If the thread becomes tangled, use stabilizer material.

1 Install the wing needle.

BABY LOCK Sofia BL137A - Install the wing needle. - 1

- For details on installing a needle, refer to "Replacing the needle" (page 41).

BABY LOCK Sofia BL137A - Install the wing needle. - 2

Memo

- Use a 130/705H 100/16 wing needle. - The needle threader cannot be used with the wing needle, otherwise the sewing machine may be damaged. Manually pass the thread through the eye of the needle from the front to the back. For details, refer to "Threading the needle manually (without using the needle threader)" (page 36).

2 Attach monogramming foot "N".

BABY LOCK Sofia BL137A - Attach monogramming foot "N". - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Attach monogramming foot "N". - 2

Select a stitch.

The stitches that can be used are 39, 40, 41, 42, 43, 44, 45, 46 or 47.

- For details, refer to "Selecting stitching" (page 49).

N1g 39/67 W--- W 3.5 mm --- 2.5 mm N1g 43/67 W--- W 5.0 mm --- 2.5 mm

BABY LOCK Sofia BL137A - Select a stitch. - 2

Note

- When sewing with the wing needle, select a stitch width of 6.0 mm (15/64 inch) or less.

BABY LOCK Sofia BL137A - Note - 1

Start sewing.

BABY LOCK Sofia BL137A - Start sewing. - 1

natural_image Three vertical columns of twelve green asterisk-like symbols on a light gray background (no text or labels)

BABY LOCK Sofia BL137A - Start sewing. - 2

CAUTION

  • When sewing with the wing needle, select a stitch width of 6.0 mm (15/64 inch) or less, otherwise the needle may bend or break.
    ●After adjusting the stitch width, slowly turn the handwheel toward you (counterclockwise) and check that the needle does not touch the presser foot. If the needle hits the presser foot, the needle may bend or break.

Partially removing threads is called "drawnwork". This gives a beautiful result with fabrics that have a loose weave. Two ways to create drawnwork are described below.

■Drawnwork (Example 1)

BABY LOCK Sofia BL137A - ■Drawnwork (Example 1) - 1

natural_image Vertical arrangement of white and green zigzag lines on a gray background (no text or symbols)

BABY LOCK Sofia BL137A - ■Drawnwork (Example 1) - 2

Pull out several threads from the fabric.

BABY LOCK Sofia BL137A - Pull out several threads from the fabric. - 1

natural_image Simple line drawing of a hand pulling a thin green cable over a gray rectangular block (no text or symbols)

BABY LOCK Sofia BL137A - Pull out several threads from the fabric. - 2

Attach monogramming foot "N".

BABY LOCK Sofia BL137A - Attach monogramming foot "N". - 1

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - Attach monogramming foot "N". - 2

Select stitch 39.

- For details, refer to "Selecting stitching" (page 49).

NE 39/67 W'--- W' 3.5 mm -- 2.5 mm

BABY LOCK Sofia BL137A - Select stitch 39. - 2

With the right side of the fabric facing up, sew along the right edge of the frayed section.

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 1

natural_image Diagram of a U-shaped magnet with a labeled N pole, showing magnetic field lines (no text or symbols beyond the label)

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 2

Press on the LCD.

N 39/67 W--- W 3.5 mm --- 2.5 mm

The pattern displayed at the top of the screen is mirrored.

NE 39/67 W/3.5mm-2.5mm

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 5

Sew along the other edge of the frayed section so that it looks like the previous stitching.

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 6

natural_image Pure diagram of a vertical line with a labeled point 'N' and a small symbol inside, no text or symbols present.

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 7

Press 📄 and set the horizontal mirror image key back to OFF.

■Drawnwork (Example 2)

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 8

natural_image Vertical strip with green diamond pattern and white grid pattern, no text or symbols present

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 9

Pull out several threads from two sections of the fabric, separated by an unfrayed section of about 4 mm (3/16 inch).

Diagram showing a hand pulling a wire over layered materials with a numbered arrow indicating direction

① 4 mm (3/16 inch)

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 11

Attach monogramming foot "N".

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 12

- For details on replacing the presser foot, refer to "Replacing the presser foot" (page 43).

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 13

Select stitch 42.

- For details, refer to "Selecting stitching" (page 49).

NE 5.0 mm 4.0 mm

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 15

Sew along the center of the unfrayed section.

BABY LOCK Sofia BL137A - With the right side of the fabric facing up, sew along the right edge of the frayed section. - 16

natural_image Pure diagram of a vertical structure with a labeled component 'N' and a triangular pattern, no text or symbols present.

4 E M B R O I D E

The steps for embroidering are described in this chapter.

Embroidering Neatly 118

Attaching the Embroidery Foot....120

Attaching the Embroidery Unit....123

Preparing the Fabric 126

Attaching the Embroidery Frame....130

Selecting Embroidery Patterns....132

Embroidering....139

Editing Patterns ....143

Using the Memory Function....150

Embroidering Neatly

This section describes the preparations and basic procedures for embroidering.

What to prepare

The following is necessary for embroidering.

Fabric

Prepare the fabric for embroidery. Prepare a piece of fabric a little larger than the embroidery frame that matches the size of the pattern you want to sew.

BABY LOCK Sofia BL137A - Fabric - 1

Note

● Always use stabilizer when sewing embroidery projects, especially when embroidering on lightweight or stretch fabrics.
- When embroidering on large pieces of fabric, arrange the fabric so that it does not hang off the table where the sewing machine is placed. If embroidery is done with the fabric hanging off, the embroidery unit movement may be impaired, this could cause the pattern to sew incorrectly.

BABY LOCK Sofia BL137A - Note - 1

CAUTION

- Do not embroider fabrics that are too thick. To check the fabric thickness, attach the embroidery frame to the embroidery unit, and use (Needle position button) to raise the needle. If there is space between the presser foot and the fabric, the fabric can be embroidered. If there is not space, do not embroider the fabric. Otherwise, the needle may break, resulting in injury.

●Be careful when sewing overlapping patterns. The needle may not easily pierce the fabric, causing the needle to break.

■Stabilizer material

Stabilizer material is used for backing and topping to stabilize and support the fabric being embroidered so the stitches can be sewn with the least amount of interference or instability. Without the proper type of backing stabilizer, the fabric may move too much within the embroidery frame causing poor alignment of the embroidery. At times, topping will be required in order to manage fabrics with a pile-like surface, such as towels, corduroy and pique knit. There are many types of backing and topping stabilizers with various weights for the various fabrics that you may be sewing. Visit your local retailer to find the stabilizer that is right for your project.

■Embroidery thread

For the upper thread, use a good quality embroidery thread. Choice of the upper thread is a major factor in a successful embroidery design. The thread strength, consistency and weight all affect the design results. These qualities determine how well the machine will sew and the number of thread breaks during sewing. For the bobbin thread, use the recommended embroidery bobbin thread found on the accessories page or visit your local retailer for additional thread.

BABY LOCK Sofia BL137A - ■Embroidery thread - 1

Note

  • For good quality embroidery designs be sure to use embroidery thread designed for embroidery machines.
    ● Before starting to sew, be sure there is enough bobbin thread. If you continue embroidering when the bobbin thread is low, the thread may become tangled.

Needle

Use a 75/11 home sewing machine needle. When embroidering on thick fabrics such as denim, use a 90/14 home sewing machine needle.

BABY LOCK Sofia BL137A - Needle - 1

Memo

● A 75/11 needle is already installed when the sewing machine is purchased.
- When replacing the needle, refer to "Replacing the needle" (page 41).

BABY LOCK Sofia BL137A - Memo - 1

CAUTION

●Since ball point needles (gold colored) are needles for fabrics where stitches are easily skipped, such as pattern stitching and stretch fabrics, be absolutely sure not to use them for embroidery. The needle may break or bend.

■Other

Embroidery frames "small" and "large" are optional. For details, refer to "Setting the fabric in the embroidery frame" (page 127).

Embroidery step by step

The basic steps for embroidery are as follows.

1 Presser foot attachmentAttach the embroidery foot "Q". For details on attaching the embroidery foot, refer to "Attaching the embroidery foot" (page 120).
2 Checking the needleUse a needle matched to the fabric. For details on replacing the needle, refer to "Replacing the needle" (page 41).
3 Embroidery unit attachmentAttach the embroidery unit. For details on attaching the embroidery unit, refer to "Attaching the embroidery unit" (page 123).
4 Bobbin thread setupFor the bobbin thread, wind embroidery bobbin thread and set it in place. For details on setting up the bobbin thread, refer to "Winding/Installing the Bobbin" (page 22).
5 Fabric preparationAttach a stabilizer material to the fabric, and hoop it in an embroidery frame. For details on preparing the fabric, refer to "Preparing the Fabric" (page 126).
6 Embroidery frame attachmentAttach the embroidery frame to the embroidery unit. For details on attaching the embroidery frame, refer to "Attaching the Embroidery Frame" (page 130).
7 Pattern selectionTurn the power on, and select an embroidery pattern. For details on selecting embroidery patterns, refer to "Selecting Embroidery Patterns" (page 132).
8 Checking the layoutCheck and adjust the size and position of the embroidery. For details on adjusting the layout and the size, refer to "Adjusting the layout and the size" (page 143).
9 Embroidery thread setupSet up embroidery thread according to the pattern. For details on setting up the thread, refer to "Upper Threading" (page 31).

BABY LOCK Sofia BL137A - Embroidery step by step - 1

Attaching the Embroidery Foot

This section describes how to attach the embroidery foot "Q".

Attaching the embroidery foot

Attach the embroidery foot "Q" when embroidering. Have the included embroidery foot "Q" and a screwdriver ready.

BABY LOCK Sofia BL137A - Attaching the embroidery foot - 1

① Embroidery foot bar
② Caught by the presser foot holder screw

BABY LOCK Sofia BL137A - Attaching the embroidery foot - 2

CAUTION

●Always use the embroidery foot "Q" when embroidering. If the wrong presser foot is used, the needle may hit the presser foot and bend or break.

BABY LOCK Sofia BL137A - CAUTION - 1

Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or structural component with labeled parts and a numbered marker '①'

① Needle position button

BABY LOCK Sofia BL137A - CAUTION - 3

Note

● The needle is correctly raised when the mark on the handwheel is at the top. Check the handwheel mark is at the top position.

BABY LOCK Sofia BL137A - Note - 1

Turn off the sewing machine.

BABY LOCK Sofia BL137A - Note - 2

BABY LOCK Sofia BL137A - Note - 3

CAUTION

- Before attaching the embroidery foot, be sure to turn off the sewing machine. Otherwise, injuries may occur if one of the operation buttons is accidentally pressed and the machine starts sewing.

BABY LOCK Sofia BL137A - CAUTION - 1

Raise the presser foot lever.

Diagram showing fluid flow through a pipe with labeled components and directional arrow

① Presser foot lever

The presser foot is raised.

BABY LOCK Sofia BL137A - CAUTION - 3

Press and hold the black button on the back of the presser foot holder to detach the presser foot.

Technical diagram showing mechanical assembly steps with numbered annotations and directional arrows indicating motion or movement.

① Black button

② Presser foot holder

The presser foot holder releases the presser foot.

5 Loosen the presser foot holder screw and remove the presser foot holder.

Turn the screwdriver toward the back.

Technical diagram of a mechanical device with numbered components and a green rotation arrow indicating motion

① Screwdriver
② Presser foot holder
③ Presser bar
④ Presser foot holder screw

6 Hold the embroidery foot "Q" with your right hand, as shown.

Hold the embroidery foot with your index finger wrapped around the lever at the back of the foot.

Technical diagram of a mechanical clamp or trigger mechanism with labeled component ① and directional arrow

① Lever

7 While pressing in the lever with your finger, fit the embroidery foot bar over the needle clamp screw to attach the embroidery foot to the presser foot bar.

Technical diagram of a sewing machine with labeled parts and directional arrows indicating motion or rotation.

① Presser bar
② Needle clamp screw
③ Embroidery foot bar

8 Secure the embroidery foot with the presser foot holder screw.

Set the embroidery foot perpendicular.

Technical diagram of a mechanical assembly with labeled component ① and directional arrow indicating rotation or movement.

① Presser foot holder screw

9 Tighten the presser foot holder screw. Turn the screwdriver toward the front.

Diagram of a sewing machine needle insertion operation, showing needle positioning and angle adjustment

① Screwdriver

CAUTION

●Do not hit the needle with your finger or the embroidery foot "Q" when attaching it. The needle may break or cause injury.
●Be sure to tighten the screw with the included screwdriver. If the screw is loose, the needle may hit the presser foot and break or bend.
●Before sewing, always turn the handwheel toward you (counterclockwise) slowly to make sure that the needle does not hit the presser foot. The needle may break or bend.

BABY LOCK Sofia BL137A - CAUTION - 1

Removing the embroidery foot

1 Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical assembly with labeled components and a numbered marker '①'

① Needle position button

2 Turn off the sewing machine.

BABY LOCK Sofia BL137A - Removing the embroidery foot - 2

CAUTION

- Before removing the embroidery foot, be sure to turn off the sewing machine. Otherwise, injuries may occur if one of the operation buttons is accidentally pressed and the machine starts sewing.

3 Raise the presser foot lever.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrow

① Presser foot lever
The presser foot is raised.

4 While pressing in the lever at the back of the embroidery foot with your finger, loosen the presser foot holder screw, and then remove embroidery foot "Q".

Turn the screwdriver toward the back.

Diagram of a sewing machine needle insertion operation, showing the needle being inserted into a socket with a green arc indicating the angle.

① Screwdriver

5 Attach the presser foot holder.

- For details, refer to "Removing and attaching the presser foot holder" (page 45).

Attaching the Embroidery Unit

This section describes how to attach the embroidery unit.

Embroidery unit precautions

BABY LOCK Sofia BL137A - Embroidery unit precautions - 1

CAUTION

●Do not move the sewing machine with the embroidery unit in place. The embroidery unit may be dropped and cause injury.

- Keep your hands and other objects away from the embroidery carriage and frame. Otherwise injury may result.

BABY LOCK Sofia BL137A - CAUTION - 1

Note

- Do not touch the connector in the embroidery unit connector slot. The connector could be damaged, and it may cause malfunctions.

- Do not lift up on the embroidery carriage, and do not forcefully move it. It may cause malfunctions.

Diagram showing a hand holding a device with a cross mark and labeled component, likely illustrating a diagnostic or testing procedure.

① Carriage

Attaching the embroidery unit

Remove the cover of the embroidery unit and get the embroidery unit ready.

BABY LOCK Sofia BL137A - Attaching the embroidery unit - 1

natural_image Line drawing of a mechanical component with no text or symbols

BABY LOCK Sofia BL137A - Attaching the embroidery unit - 2

Turn off the sewing machine.

BABY LOCK Sofia BL137A - Attaching the embroidery unit - 3

BABY LOCK Sofia BL137A - Attaching the embroidery unit - 4

Note

● Always turn off the sewing machine before attaching the embroidery unit. It may cause malfunctions.

BABY LOCK Sofia BL137A - Note - 1

Pull the flat bed attachment off to the left.

BABY LOCK Sofia BL137A - Note - 2

natural_image Diagram of a device's internal structure showing a green component and a blue housing, with a green arrow indicating direction (no text or symbols present)

① Flat bed attachment

BABY LOCK Sofia BL137A - Note - 3

BABY LOCK Sofia BL137A - Note - 4

Slide the embroidery unit onto the sewing machine arm.

Push it in until it clicks and stops.

BABY LOCK Sofia BL137A - Slide the embroidery unit onto the sewing machine arm. - 1

natural_image Line drawing of a sewing machine needle stitching a green box with a handle (no text or symbols)

The embroidery unit is attached.

BABY LOCK Sofia BL137A - Slide the embroidery unit onto the sewing machine arm. - 2

Note

● Make sure that there is no gap between the embroidery unit and the sewing machine, otherwise the embroidery pattern may not be sewn correctly. Be sure to fully insert the connector into the connection port.
- Do not push on the carriage when attaching the embroidery unit to the machine, otherwise damage to the embroidery unit may result.

BABY LOCK Sofia BL137A - Note - 1

Turn on the sewing machine.

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 1

The confirmation message is displayed.

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 2

Be sure that no objects or hands are near the embroidery unit and press OK

The carriage of the embroidery unit will move.

The carriage moves to its initial position.

Technical diagram of a sewing machine with labeled component (①) and directional arrow indicating movement or force.

① Carriage
BABY LOCK Sofia BL137A - Be sure that no objects or hands are near the embroidery unit and press OK - 3

CAUTION

●Do not put your hands or other objects near the carriage. It may cause injury.

BABY LOCK Sofia BL137A - ●Do not put your hands or other objects near the carriage. It may cause injury. - 1

Note

  • If the machine is initialized with hands or objects near the carriage, the screen may return to the initial display. After removing whatever is near the carriage, turn the power on again.
    The screen for selecting the embroidery pattern type is displayed.

Icon set displaying various application and data-related symbols including butterfly, heart, document, and folder icons.

BABY LOCK Sofia BL137A - Note - 2

Memo

● Utility stitches cannot be selected when the embroidery unit is attached.
- For details on the embroidery patterns, refer to "Selecting Embroidery Patterns" (page 132).

Removing the embroidery unit

Make sure that the sewing machine is completely stopped and follow the instructions below.

1 Remove the embroidery frame.

- For details on removing the embroidery frame, refer to "Removing the embroidery frame" (page 131).

2 Press and then press . OK

Row of eight icons with letters and symbols, including butterfly, heart, document, and computer interface

The embroidery carriage moves into a position where it can be saved.

3 Turn off the sewing machine.

BABY LOCK Sofia BL137A - Turn off the sewing machine. - 1

! CAUTION

●Always turn off the sewing machine before removing the embroidery unit. It may cause malfunctions if removed when the machine is turned on.

4 Hold the release button on the bottom left of the embroidery unit, and slowly pull the embroidery unit to the left.

Diagram illustrating sewing process steps with labeled arrows and numbered instructions

① Release button

The embroidery unit separates from the sewing machine.

CAUTION

●Do not carry the embroidery unit by holding the carriage. It may cause malfunctions.

BABY LOCK Sofia BL137A - CAUTION - 1

Preparing the Fabric

After attaching a stabilizer material to the embroidery fabric, it is stretched on an embroidery frame.

Attaching a stabilizer material to the fabric

For successful design stitching and to prevent fabric puckering around the design, iron fusible stabilizer to the fabric or place non-fusible stabilizer in the hoop below the fabric.

BABY LOCK Sofia BL137A - Attaching a stabilizer material to the fabric - 1

Memo

● There are many types of backing and topping stabilizers with various weights for the various fabrics that you may be sewing. Visit your local retailer to find the stabilizer that is right for your project.

BABY LOCK Sofia BL137A - Memo - 1

CAUTION

●Always use stabilizer material when sewing embroidery projects. The needle may break or bend if you embroider without using a stabilizer material for thin fabrics or stretch fabrics. Furthermore, the pattern may be sewn incorrectly.

1 Prepare stabilizer material that is larger than the embroidery frame being used.

O ① ② ③ ×

① Fabric
② Size of embroidery frame
③ Stabilizer material

2 If you are using stabilizers with adhesive, place the adhesive surface of the stabilizer material against the wrong side of the fabric, and iron it with a steam iron.

Diagram showing a document with labeled parts, including a leaf icon and numbered annotations ①, ②, and ③.

① Stabilizer material
② Fabric (wrong side)
③ Attached surface

□ When it cannot be ironed or placed in the hoop

For fabrics, such as towels, which cannot be ironed or for embroidering in places where ironing is difficult, place the stabilizer material under the fabric, and stretch the fabric in the embroidery frame without attaching the stabilizer.

Setting the fabric in the embroidery frame

The fabric is stretched in the embroidery frame. If the fabric is loose, the quality of the embroidery pattern may be poor. Put the fabric in the frame without slack following the steps below. Have a fabric with a stabilizer material attached and the embroidery frame (medium, small or large) ready.

■Embroidery frame (medium)

Patterns with a height of up to 10 cm (4 inches) and a width of up to 10 cm (4 inches) can be sewn.

BABY LOCK Sofia BL137A - ■Embroidery frame (medium) - 1

■Embroidery frame (small) [option]

Patterns with a height of up to 2 cm (1 inch) and a width of up to 6 cm (2-1/2 inches) can be sewn. This is used for letters and other small embroidery.

BABY LOCK Sofia BL137A - ■Embroidery frame (small) [option] - 1

BABY LOCK Sofia BL137A - ■Embroidery frame (small) [option] - 2

Memo

● There are patterns for which embroidery frame (small) cannot be used.

■Embroidery frame (large) [option]

Embroidery can be done in an area with a height of up to 17 cm (6-7/10 inch) and a width of up to 10 cm (4 inch). This is used to embroider multiple patterns without changing the fabric position in the frame.

BABY LOCK Sofia BL137A - ■Embroidery frame (large) [option] - 1

natural_image Technical line drawing of a rectangular electronic component with mounting holes and internal channels (no text or symbols)

BABY LOCK Sofia BL137A - ■Embroidery frame (large) [option] - 2

CAUTION

●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.
●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.

5 Gently remove the fabric from the frame without loosening the adjustment screw.

BABY LOCK Sofia BL137A - CAUTION - 1

natural_image Illustration of hands holding a square plate with a green arrow indicating rotation (no text or symbols)

BABY LOCK Sofia BL137A - CAUTION - 2

Memo

● This precautionary step will help reduce pattern distortion while embroidering.

6 Press the inner frame in from the top of the fabric again, lining up on the inner frame and on outer frame.

BABY LOCK Sofia BL137A - Memo - 1

natural_image Simple line drawing of a rectangular plate with a downward arrow indicating a drop, placed on a flat surface (no text or symbols)

BABY LOCK Sofia BL137A - Memo - 2

① Outer frame
② Inner frame
③ Fabric (right side)
④ Stabilizer material
⑤ Ledge of outer frame

- Press down firmly until the inner frame is securely pressed against the ledge of the outer frame.

7 Tighten the adjustment screw while removing any slack in the fabric by hand. The goal is to have a drum-like sound when the stretched fabric is struck lightly.

BABY LOCK Sofia BL137A - Memo - 3

natural_image Illustration of a hand holding a folded or damaged object with directional arrows indicating movement (no text or symbols)

■Using embroidery sheets

If the embroidery sheet attached to the embroidery frame is used, the embroidery can be sewn in exactly the right position on the fabric.

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 1
Embroidery sheet (medium)

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 2
Embroidery sheet (small) [option]

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 3
Embroidery sheet (large) [option]

① Make a mark with a chalk pen at the center of the position for the pattern to be embroidered.

ABC ① ②

① Embroidery pattern ② Mark

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 5

Place the embroidery sheet on the inner frame.

Diagram showing two labeled components (① and ②) with a downward arrow indicating a process or transformation.

① Embroidery sheet
② Inner frame

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 7

Line the mark on the fabric up with the base line on the embroidery sheet.

Diagram showing a 3D object with labeled parts and directional arrow, likely illustrating a geometric or mechanical concept.

① Base line
② Mark

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 9

Place the inner frame with the fabric on the outer frame and stretch the fabric.

- For details, refer to page 127.

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 10

Remove the embroidery sheet.

BABY LOCK Sofia BL137A - ■Using embroidery sheets - 11

natural_image Diagram of a mechanical component with a highlighted section and an upward arrow (no text or symbols)

■Embroidery on fabrics that cannot be stretched on an embroidery frame

When small pieces of fabric that cannot be stretched on an embroidery frame or thin pieces like ribbon are being embroidered, use stabilizer material as a base to stretch on the frame. We recommend stabilizer material for all embroidery.

T.1 ① ② ③

T.1 ① ③ ②

T.1 ① ③

① Stabilizer material
② Tack or spray glue
③ Fabric

After completing the embroidery, remove the stabilizer material carefully.

Attaching the Embroidery Frame

This section describes how to attach the embroidery frame.

Attaching the embroidery frame

1 Wind the embroidery bobbin thread onto the bobbin and set it into the bobbin case.

- For details, refer to "Winding/Installing the Bobbin" (page 22).

2 Raise the presser foot lever.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrow

① Presser foot lever

3 Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or fluid system with labeled components and directional arrows

① Needle position button

4 Pass the embroidery frame under the presser foot while raising the presser foot lever even further.

BABY LOCK Sofia BL137A - Pass the embroidery frame under the presser foot while raising the presser foot lever even further. - 1

natural_image Technical illustration of a sewing machine needle stitching a component, with green arrows indicating direction (no text or symbols)

CAUTION

●Do not touch the start/stop button, needle position button or reverse/reinforcement stitch button. If one of the buttons is accidentally pressed, the machine will begin sewing and your finger may be pricked with the needle or the needle may break.

5 Firmly insert the embroidery frame guide into the embroidery carriage frame holder from the top.

Line up the embroidery frame guide tabs and the embroidery carriage frame holder slots and push in until it clicks and stops.

Technical diagram showing a mechanical assembly with labeled parts and a magnified inset view of internal components.

① Embroidery frame guide tabs
② Embroidery carriage frame holder slots

The embroidery unit is attached.

BABY LOCK Sofia BL137A - Firmly insert the embroidery frame guide into the embroidery carriage frame holder from the top. - 2

Note

- Be sure to insert both pins. If only the forward or the back pin is inserted, the pattern may not turn out correctly.

CAUTION

●Correctly set the embroidery frame into the embroidery frame holder. Otherwise, the presser foot may hit the embroidery frame, resulting in injury.

Removing the embroidery frame

Make sure that the sewing machine is completely stopped and follow the instructions below.

a

Raise the presser foot lever.

Technical diagram showing a mechanical or fluid system with labeled components and directional arrow

① Presser foot lever

b

Press (Needle position button) once or twice to raise the needle.

Technical diagram showing a mechanical or fluidic component with labeled parts and directional arrows

① Needle position button

C

Press the part of the embroidery frame holder in the figure to the left side, and raise the embroidery frame.

Diagram showing a hand operating a tool with a green arrow indicating direction, labeled with number ①

① Press here to remove.

The embroidery frame will separate from the embroidery frame holder.

d

Pass the embroidery frame under the presser foot while raising the presser foot lever even further.

BABY LOCK Sofia BL137A - Removing the embroidery frame - 4

natural_image Technical line drawing of a sewing machine needle stitching a component with green directional arrows indicating motion (no text or symbols)

Remove the embroidery frame.

BABY LOCK Sofia BL137A - Removing the embroidery frame - 5

CAUTION

●Do not touch the start/stop button, needle position button or reverse/reinforcement stitch button. If one of the buttons is accidentally pressed, the machine will begin sewing and your finger may be pricked with the needle or the needle may break.

Selecting Embroidery Patterns

This section provides details on the various types of embroidery patterns available and the procedure for selecting a pattern.

The patterns saved in the sewing machine and embroidery cards are intended for private use only. Any public or commercial use of copyrighted patterns is an infringement of copyright law and is strictly prohibited.

Embroidery pattern types

An embroidery pattern can be selected from the following types available.

Diagram showing a grid of icons with labels ① to ⑥, including butterfly, heart, document, and lock symbols.

① Embroidery patterns

There are total 70 patterns. The patterns are completed by changing the upper thread according to the instructions displayed on the screen. For details, refer to "Selecting an embroidery pattern"(page 137).

② Alphanumeric character patterns

There are 5 types of characters: upper case/lower case/numbers/symbols/European characters. For details, refer to "Selecting alphanumeric characters" (page 136).

③ Frame patterns

10 shapes, such as squares and circles, can be combined with 12 stitch types. For details, refer to "Selecting a frame pattern" (page 137).

④ Embroidery card

Press when selecting patterns from an embroidery card. For details, refer to "Using an embroidery card" (page 138).

⑤ Patterns saved in the machine's memory

Press when retrieving patterns from the machine's memory. For details, refer to "Saving patterns" (page 151).

⑥ Patterns retrieved from the computer

Patterns retrieved from a computer can be embroidered. For details, refer to "Retrieving embroidery patterns from the computer" (page 152).

LCD (liquid crystal display) operation

The LCD (liquid crystal display) is operated using the operation keys on the display panel.

The use of the keys for embroidery will be explained below.

■Operation keys
Diagram of a device control panel with labeled buttons and navigation arrows

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 2

When there are patterns that are not

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 3

displayed on the screen (when <

or is displayed), the previous patterns/subsequent patterns are displayed.

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 4

Returns to the previous screen.

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 5

Returns to the type selection screen. The selected pattern is cancelled.

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 6

Press this key to adjust language or change the thread color display or other settings.

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 7

Press to get help on embroidery unit attachment, embroidery frame attachment, etc.

BABY LOCK Sofia BL137A - LCD (liquid crystal display) operation - 8

Press this key to save embroidery patterns and the alphanumeric characters in the machine's memory.

☐ Setting the display while embroidering

Press (Settings key) and then (Next > page key). Then, select the item by pressing

NAME OF COLOR: Typical color name
[NAME OF COLOR] [----] [mm] 1/8 DARK OLIVE CHECK COLOR VII>6 AD- JUST

TIME: Time required for embroidering
TIME mm 1/8 0min/28min CHECK COLOR WIL>6 AD- JUST

NEEDLE COUNT: Needle progress number

[NEEDLE COUNT] [----] [mm] 1/8 0/9919 CHECK COLOR MILK AD- JUST

123: Thread color number

[ #123 ] [EMBROIDERY] [ mm ]

Select from the following thread color number sets (The display above is an example when EMBROIDERY (POLYESTER) THREAD# is selected.)

• EMBROIDERY (POLYESTER) THREAD#
•COUNTRY (COTTON) THREAD#
•MADEIRA POLY THREAD#
•MADEIRA RAYON THREAD#
•SULKY THREAD#
•ROBISON-ANTON POLY THREAD#

DISPLAY UNIT

The measurement units that are displayed can be selected. [mm/inch]

[NAME OF COLOR] [----] [mm] Welcome cm SIZE OUT 1.7 ↑+0.00 9.3 ←+0.00

■LCD button

Example: Selecting alphanumeric characters

Q come DELETE a b c d e f CHECK g h i j k l WM>>b m n A a L M S AD- JUST

CHECK

When a specific pattern is selected, press this key and then, press ▶ to switch the display. The sewing settings such as the specified alphanumeric character string and color are confirmed.

900 1/1 W e l c

BABY LOCK Sofia BL137A - CHECK - 2

Press this key to change the thread settings.

come DELETE a b c d e f CHECK 100%

BABY LOCK Sofia BL137A - CHECK - 4

Press this key to select or cancel programmed thread cutting.

BABY LOCK Sofia BL137A - CHECK - 5

Press ☑ to change the thread density (characters and frame patterns only).

BABY LOCK Sofia BL137A - CHECK - 6

Press this key to adjust the pattern.

1/1 BLACK W e l c MULTI COLOR CHECK 4 LAY- OUT

BABY LOCK Sofia BL137A - CHECK - 8

Press this key when you want to change the color, character by character in character embroidery. Since the sewing machine stops at the end of each character, the upper thread is changed as you sew. Press this key again to cancel multi-color.

1/4 BLACK W e I c MULTI COLOR CHECK Y-4 LAY- OUT

BABY LOCK Sofia BL137A - CHECK - 10

The needle progresses one color or one stitch (if pressed continuously, 9 stitches to 30 stitches) at a time and changes the position for starting the embroidery. This is used when a specific color is not sewn or when restarting the sewing machine after power has been turned off in the middle of the operation.

1/1 BLACK W e l c

BABY LOCK Sofia BL137A - CHECK - 12

Back one color

BABY LOCK Sofia BL137A - CHECK - 13

Forward one color

BABY LOCK Sofia BL137A - CHECK - 14

Back one stitch

BABY LOCK Sofia BL137A - CHECK - 15

Forward one stitch

- For details, refer to "Resewing" (page 147).

BABY LOCK Sofia BL137A - CHECK - 16

The position of the pattern within the embroidery frame can be checked, and the size and angle can be changed.

For details, refer to "Adjusting the layout and the size" (page 143).

Welcome cm SIZE LAY-OUT 1.7 ↑+0.00 9.3 ←+0.00

BABY LOCK Sofia BL137A - CHECK - 18

Memo

- Keys that appear surrounded with a dotted line (ex. I can not be used.

Example: Selecting an embroidery pattern

1/8 DARK OLIVE CHECK COLOR VII>6 AD-JUST

BABY LOCK Sofia BL137A - Example: Selecting an embroidery pattern - 2

Press this key to check the order of multi color. Press to switch the display.

1/8 DARK OLIVE

Selecting alphanumeric characters

Specify the characters for embroidery.

BABY LOCK Sofia BL137A - Selecting alphanumeric characters - 1

Memo

  • When "The pattern is too large for the embroidery frame" is displayed, no more characters can be input.
    ● Characters from different fonts (sans serif and serif, etc.) cannot be combined.

1 Select the alphanumeric characters.

A B AB 4 ↑ ← → ↓ ← ← < >

2 Select the font.

ABC ABC ABC ABC ABC

3 Enter the characters.

BABY LOCK Sofia BL137A - Enter the characters. - 1

Memo

  • If a character is pressed by mistake, press [BELETE]
    ● To enter a space, press " _".

&?! - ( CHECK ) ) ', . , / A a LMS AD- JUST

Example: Come on

BABY LOCK Sofia BL137A - Example: Come on - 1

Switch between uppercase/ lowercase

BABY LOCK Sofia BL137A - Example: Come on - 2

Switch among large/medium/small sizes

DELETE CHECK MIL>6 AD-JUST Aa LMS

DELETE ABCDEF CHECK GHIJKLMNOP MN Aa LMS ADJUST

C DELETE ABCDEF CHECK GHIJKL >> MN Aa LMS ADJUST

C o DELETE o p q r s t CHECK u v w x y z W#># A a L M S AD- JUST

Com DELETE a b c d e f CHECK g h i j k l W#># m n A a L M S AD- JUST

Come DELETE a b c d e f CHECK g h i j k l W#>> m n A a L M S AD- JUST

Q ome _ DELETE & ? ! - ( CHECK ) ', . , / W#>6 A a L M5 AD- JUST

me_o DELETE op q r s t CHECK uvw x y z WIX A a L M S AD-JUST

e_on DELETE a b c d e f CHECK g h i j k l W#># m n A a L M S AD- JUST

Memo

● The characters you entered can be saved for later use. For details, refer to "Saving patterns" (page 151).

Selecting an embroidery pattern

There are 70 embroidery patterns, such as flowers and animals, saved in the machine's memory.

BABY LOCK Sofia BL137A - Selecting an embroidery pattern - 1

70 Embroidery patterns

BABY LOCK Sofia BL137A - Selecting an embroidery pattern - 2

Memo

● Refer to "Embroidery Pattern Color Change Table" in the Quick reference guide for samples of completed patterns and the thread used.

1

Press

BABY LOCK Sofia BL137A - Press - 1

Toolbar with icons and function labels, including butterfly, alphabet, heart, folder, and document symbols

The pattern selection screen is displayed.

2

Select the pattern.

Switch the screen using (Previous page key) and (Next page key).

-10 < 1/70 +10 2/70 > < | >< | > | |

When -10 posted, the display of patterns moves backward/forward 10 patterns.

-10 < 3/70 +10 4/70 > <

-10 < 3/70 +10 4/70 > < 3/70 >

When a pattern is selected, it can be embroidered.

1/9 DARK OLIVE CHECK COLOR MIL>6 AD- JUST

Selecting a frame pattern

10 shapes, such as squares and circles, can be combined with 12 stitch types.

BABY LOCK Sofia BL137A - Selecting a frame pattern - 1

Memo

● Refer to "Frame patterns" in the Quick reference guide for frame pattern shapes and stitches.

1

Press

BABY LOCK Sofia BL137A - Press - 1

AB AB

The frame shape selection screen is displayed.

2

Select the frame shape.

Switch the screen using < (Previous key) and (Next page key), and select from the 10 types.

Select The Frame. < 1/10 2/10 >

Select The Frame. < 3/10 4/10 >

The stitch selection screen is displayed.

BABY LOCK Sofia BL137A - Select the frame shape. - 3

page

BABY LOCK Sofia BL137A - Select the frame shape. - 4

Select the stitch.

Switch the screen using (Previous page key) and (Next page key), and select from the 12 stitches.

Select The stitch. < 1 2 3 4 5 6 >

When a stitch is selected, it can be embroidered.

1/2 BLACK CHECK COLOR NAME ADJUST

Using an embroidery card

If an embroidery card is used, you can embroider patterns other than the patterns saved in the sewing machine. There are various cards with different themes.

BABY LOCK Sofia BL137A - Using an embroidery card - 1

BABY LOCK Sofia BL137A - Using an embroidery card - 2

Note

● Always turn off the sewing machine to insert and remove embroidery cards.
- Insert the embroidery card into the embroidery card slot, facing it in the right direction.
- Do not put anything other than an embroidery card in the embroidery card slot.
- When embroidery cards are not in use, keep them in their storage cases.
- Use only embroidery cards manufactured for this machine. Using unauthorized cards may cause your machine to operate incorrectly.
● Embroidery cards purchased in foreign countries may not work with your machine.

BABY LOCK Sofia BL137A - Note - 1

Turn off the sewing machine.

BABY LOCK Sofia BL137A - Turn off the sewing machine. - 1

BABY LOCK Sofia BL137A - Turn off the sewing machine. - 2

Insert the embroidery card in the embroidery card slot on the right side of the sewing machine.

Face the arrow on the embroidery card toward you, and insert it in the direction of the arrow.

Diagram showing a device with a green screen mounted on its side, connected to a cable via a plug, with an inset magnified view highlighting the screen's position.

BABY LOCK Sofia BL137A - Insert the embroidery card in the embroidery card slot on the right side of the sewing machine. - 2

Turn on the sewing machine.

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 1

BABY LOCK Sofia BL137A - Turn on the sewing machine. - 2

Press on the screen.

press on the screen.

This selection screen for the patterns saved in the card is displayed.

BABY LOCK Sofia BL137A - Press on the screen. - 2

Select a pattern.

The operation is the same as in "Selecting an embroidery pattern" (page 137).

-10 <1/31 +10 2/31>

Embroidering

After the preparations are done, you can try embroidering. This section describes the steps for embroidering and appliquéing.

Embroidering a pattern

Embroidery patterns are embroidered with a change of thread after each color.

1 Prepare embroidery thread of the color shown on the screen.

1/8 DARK OLIVE CHECK COLOR VII>6 AD-JUST

① Embroidery frames that can be used for embroidering
② Current color step/Number of colors in design
③ Current name of color
④ Current color part
⑤ Next color part

- The thread color number set displayed for the thread colors can be changed. Press (Setting key), and then change the setting in the setting screen. For details, refer to "LCD (liquid crystal display) operation" (page 133).

1/8 DARK OLIVE CHECK COLOR WILE AD- JUST

[NAME OF COLOR] [----] [mm]

■ Example: Embroidery thread number selected

[ #123 ] [ EMBROIDERY ] [ mm ]

517 1/8 EMBROIDERY CHECK COLOR MIL>€ AD- JUST

2 Set the embroidery thread, and thread the needle.

- Refer to "Threading the upper thread" (page 32).

BABY LOCK Sofia BL137A - Set the embroidery thread, and thread the needle. - 1

Note

● Before using the needle threader, be sure to lower the presser foot.

3 Pass the thread through the embroidery foot hole, and hold it lightly in your left hand. Give the thread a little slack.

BABY LOCK Sofia BL137A - Pass the thread through the embroidery foot hole, and hold it lightly in your left hand. Give the thread a little slack. - 1

natural_image Line drawing of a sewing machine needle stitching a circular arc (no text or symbols)

CAUTION

●If the thread is pulled too tight, the needle may break or bend.
●Do not let hands or objects hit the carriage while sewing. The pattern may misalign.

BABY LOCK Sofia BL137A - CAUTION - 1

4 Lower the presser foot lever.

Technical diagram showing a mechanical or structural component with labeled parts and an arrow indicating direction.

① Presser foot lever

5 Press (Start/stop button).

BABY LOCK Sofia BL137A - Press (Start/stop button). - 1

natural_image Pure mechanical diagram showing a lever and guide mechanism without any text or symbols

① Start/stop button

! CAUTION

●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.

6 After progressing 5-6 stitches, press START/ (!) (Start/stop button) to stop the machine.

7 Use scissors to cut the thread at the beginning of the stitching.

Cut the thread at the edge of the stitching.

BABY LOCK Sofia BL137A - Use scissors to cut the thread at the beginning of the stitching. - 1

natural_image Line drawing of a sewing machine needle with scissors cutting the base (no text or symbols)

Note

- If the thread is left at the beginning of the stitching, it may be sewn over as you continue embroidering the pattern, making it very difficult to deal with the thread after the pattern is finished. Trim the thread at the beginning.

8 Press (Start/stop button) again.

The embroidery begins again.
Stitching stops automatically with reinforcement after one color has been completed. When automatic thread cutting is set, the thread is cut.

9 Set up embroidery thread for the next color, and repeat steps 2 through 8.

When the last color is sewn, "Finished sewing." will appear on the display. Press OK, and the display will return to the initial screen.

10 Cut the excess thread.

BABY LOCK Sofia BL137A - Cut the excess thread. - 1

Memo

- For the automatic cutting setting, refer to "LCD (liquid crystal display) operation" (page 135).

Appliquéing

Prepare the base fabric and the appliqué fabric (appliqué piece). Press Settings key), and set the thread color display to NAME OF COLOR, so "APPLIQUE MATERIAL", "APPLIQUE POSITION" and "APPLIQUE" are displayed on the screen.

1 Select an appliqué pattern.

-10 < 49/70 +10 50/70 >

"APPLIQUE MATERIAL" is displayed on the screen.

2 Apply iron-on stabilizer to the back of the appliqué piece fabric, and stretch it on the embroidery frame.

1/4 APPLIQUE MATERIAL CHECK COLOR WIDE AD- JUST

3 Lower the presser foot lever, and press STOP / ! (Start/stop button).

The cut-out for the appliqué piece is sewn, and the sewing machine stops.

Diagram of a pillow with labeled parts, showing two numbered sections (① and ②) and a dashed outline within the square.

"APPLIQUE POSITION" will be displayed on the screen.

2/4 APPLIQUE POSITION CHECK COLOR WIDE AD-JUST

4 Remove the fabric from the embroidery frame, and cut it out along the cut-out line.

Cut carefully along the stitching and remove the thread.

BABY LOCK Sofia BL137A - Remove the fabric from the embroidery frame, and cut it out along the cut-out line. - 1

natural_image Diagram showing a hair follicle being cut with scissors, no text or symbols present

- If it is not cut right on the stitching, it will not be finished neatly.

5 Stretch the base fabric on the embroidery frame.

6 Set up the thread for appliquéing.

7 Lower the presser foot lever, and press START/ (Start/stop button).

2/4 APPLIQUE POSITION CHECK COLOR WIL>6 AD-JUST

The position for the appliqué is stitched, and the sewing machine stops. "APPLIQUE" will be displayed on the screen.

Diagram showing a square with a dashed outline and numbered annotations (① and ②) pointing to different regions.

① Appliqué position ② Base fabric

BABY LOCK Sofia BL137A - Lower the presser foot lever, and press START/ (Start/stop button). - 3

BABY LOCK Sofia BL137A - Lower the presser foot lever, and press START/ (Start/stop button). - 4

Apply a thin layer of fabric glue or spray adhesive to the back of the appliqué piece, and attach it in the appliqué position.

BABY LOCK Sofia BL137A - Lower the presser foot lever, and press START/ (Start/stop button). - 5

natural_image Simple diagram showing a gray irregular shape with a dashed green outline inside a square (no text or symbols)

BABY LOCK Sofia BL137A - Lower the presser foot lever, and press START/ (Start/stop button). - 6

Lower the presser foot lever, and press START/↑(Start/stop button).

3/4 APPLIQUE CHECK COLOR MIL>8 AD- JUST

The position for the appliqué is stitched, and the sewing machine stops.

BABY LOCK Sofia BL137A - Lower the presser foot lever, and press START/ (Start/stop button). - 8

natural_image Simple illustration of a rounded square with a central irregular shape (no text or symbols)

BABY LOCK Sofia BL137A - Lower the presser foot lever, and press START/ (Start/stop button). - 9

Memo

- When "APPLIQUE MATERIAL", "APPLIQUE POSITION" and "APPLIQUE" are displayed, a specific color thread does not appear. Use a proper color thread to match the appliqué piece.

BABY LOCK Sofia BL137A - Memo - 1

Follow the instructions on the screen, and set up the embroidery thread for the next color.

4/4 BRASS CHECK COLOR WHI>6 AD- JUST

BABY LOCK Sofia BL137A - Memo - 3

natural_image Simple illustration of a gray square with a green irregular shape inside, surrounded by a white border (no text or symbols)

Editing Patterns

This section describes ways to edit, adjust, reposition and memorize patterns.

Adjusting the layout and the size

The pattern is normally positioned in the center of the embroidery frame. You can check the layout before starting embroidery and change the position and the size.

BABY LOCK Sofia BL137A - Adjusting the layout and the size - 1

Memo

● Keys that appear surrounded with a dotted line (ex. cannot be used.

1 After selecting the embroidery pattern, press AD- JUST

The sewing screen is displayed.

Q: come DELETE a b c d e f CHECK g h i j k l WM>>8 m n A a L M S AD- JUST

BABY LOCK Sofia BL137A - After selecting the embroidery pattern, press AD- JUST - 2

Press LAY OUT.

1/1 BLACK W e l c MULTI COLOR CHECK 4- LAY- OUT

The layout LCD is displayed.

BABY LOCK Sofia BL137A - After selecting the embroidery pattern, press AD- JUST - 4

Check and adjust the layout.

Welcome 1.7 ↑+0.00 9.3 ←+0.00 SIZE LAY-OUT ① ② ③ ④ ⑤ ⑥ ⑦ ⑪ ⑩ ⑨ ⑧

① Layout within the frame
② Display unit (cm/INCH)
③ Available embroidery frames
④ Change position keys
⑤ Size key/Layout key
⑥ Rotation key
⑦ Horizontal mirror image key
⑧ Trial key
⑨ Starting point key
⑩ Distance from the center
⑪ Embroidery size

BABY LOCK Sofia BL137A - After selecting the embroidery pattern, press AD- JUST - 6

Embroidery frame size

The size of embroidery frame that can be used is displayed. When the smaller mark is grayed out in the display, embroidery frame (small) cannot be used. These icons flash if the pattern was resized, the layout was adjusted, or the recommended embroidery frame size was changed.

BABY LOCK Sofia BL137A - Embroidery frame size - 1

CAUTION

●Use the embroidery frame that matches the size of the pattern being embroidered. Otherwise, the embroidery frame may be hit by the presser foot and cause injury or needle breakage.

BABY LOCK Sofia BL137A - CAUTION - 1

Size key

Increases/decreases the size of

the pattern. Press to return to the previous screen.

Welcome cm SIZE LAY OUT 1.7 ↑+0.00 9.3 ←+0.00

BABY LOCK Sofia BL137A - Size key - 2

Decreases size

BABY LOCK Sofia BL137A - Size key - 3

Returns to original size. When the pattern was moved with the change position keys, it returns to its original position.

BABY LOCK Sofia BL137A - Size key - 4

Increases size

BABY LOCK Sofia BL137A - Size key - 5

Change position keys

Moves the embroidery position up, down, left and right.

BABY LOCK Sofia BL137A - Change position keys - 1

Memo

- If you change the size of the pattern or reverse it, the embroidery which have been moved will return to its initial position. Use the Change position keys after you have changed the size of the pattern or reversed it.

- The embroidery patterns you have edited or adjusted can be saved in the sewing machine's memory. For details, refer to "Saving patterns" (page 151).

BABY LOCK Sofia BL137A - Memo - 1

Layout key

Press this key to move to rotation screen.

Welcome cm SIZE OUT 1.7 ↑ +0.00 9.3 ↔ +0.00

BABY LOCK Sofia BL137A - Layout key - 2

Rotation key

Rotates the pattern 1 degree, 10 degrees or 90 degrees at a time.

Press (Back key) to return to the previous screen.

Welcome 0° ↓ 1.7 ↓ +0.00 ↔ 9.3 ↔ +0.00 ← 90° 90° ← 10° 10° ← 1° 1° RESET

BABY LOCK Sofia BL137A - Rotation key - 2

Rotates the pattern 90 degrees to the left

BABY LOCK Sofia BL137A - Rotation key - 3

Rotates the pattern 90 degrees to the right

BABY LOCK Sofia BL137A - Rotation key - 4

Rotates the pattern 10 degrees to the left

BABY LOCK Sofia BL137A - Rotation key - 5

Rotates the pattern 10 degrees to the right

BABY LOCK Sofia BL137A - Rotation key - 6

Rotates the pattern 1 degree to the left

BABY LOCK Sofia BL137A - Rotation key - 7

Rotates the pattern 1 degree to the right

BABY LOCK Sofia BL137A - Rotation key - 8

Returns the pattern to its original position

BABY LOCK Sofia BL137A - Rotation key - 9

Memo

- When the pattern is larger than 10cm (4 inches) x 10cm (4 inches), there may be a case that the pattern cannot be rotated.

BABY LOCK Sofia BL137A - Memo - 1

Horizontal mirror image key

Mirrors the pattern left and right.

BABY LOCK Sofia BL137A - Horizontal mirror image key - 1

Memo

● Mirroring patterns is possible only for a embroidery pattern or a frame pattern.

BABY LOCK Sofia BL137A - Memo - 1

Starting point stitching key

Switches the stitching starting point between center and lower left of the design.

- Press to return to the previous screen.

BABY LOCK Sofia BL137A - Starting point stitching key - 1

Trial key

Moves the frame to check the pattern position.

BABY LOCK Sofia BL137A - Trial key - 1

natural_image Illustration of a hand using a sewing machine to press or install a device with a green dashed pattern on the cover (no text or symbols visible)

BABY LOCK Sofia BL137A - Trial key - 2

CAUTION

●Never lower the needle when the embroidery frame is moving. The needle may break or bend.
- When you have revised the pattern, check the display of available embroidery frames and use an appropriate frame. If you use an embroidery frame not displayed as available for use, the presser foot may strike the frame and possibly cause injury.

BABY LOCK Sofia BL137A - CAUTION - 1

Press (Back key) to return to the previous screen.

Welcome cm SIZE OUT 1.7 ↓+0.00 9.3 ←+0.00

BABY LOCK Sofia BL137A - CAUTION - 3

Memo

  • When the power is turned off, the layout returns to the original setting.
  • You can also check the pattern size and distance from the center by pressing LAY-OUT after beginning embroidering.
  • The embroidery patterns you have edited or adjusted can be saved in the sewing machine's memory. For details, refer to "Saving patterns" (page 151).

Adjusting the thread tension

If embroidery fails, it is difficult to undo the thread and the fabric may be damaged.

Before embroidering, use a scrap of the same fabric to check the adjustment of the thread tension, etc.

The upper thread tension is changed using the thread tension dial.

When doing machine embroidery, the tension dial should be set somewhere between 2 to 6.

BABY LOCK Sofia BL137A - Adjusting the thread tension - 1

① Loose (Decrease thread tension)
② Tight (Increase thread tension)
③ Upper thread tension dial

BABY LOCK Sofia BL137A - Adjusting the thread tension - 2

Memo

- If the stitches appear loose, turn the tension up one notch and resew.

■Correct thread tension

The thread tension is correct when upper thread is just visible on back of the fabric.

BABY LOCK Sofia BL137A - ■Correct thread tension - 1
[Non-Text]

BABY LOCK Sofia BL137A - ■Correct thread tension - 2

① Right side of fabric
② Wrong side of fabric

■Upper thread is too tight

The lower thread will be visible on the front of the fabric. In this instance, decrease the upper thread tension.

BABY LOCK Sofia BL137A - ■Upper thread is too tight - 1

BABY LOCK Sofia BL137A - ■Upper thread is too tight - 2

① Right side of fabric
② Wrong side of fabric

■Upper thread is too loose

The upper thread has slack. In this instance, increase the upper thread tension.

BABY LOCK Sofia BL137A - ■Upper thread is too loose - 1

BABY LOCK Sofia BL137A - ■Upper thread is too loose - 2

① Right side of fabric
② Wrong side of fabric

BABY LOCK Sofia BL137A - ■Upper thread is too loose - 3

Note

  • If the upper thread is not threaded correctly or the bobbin is not installed correctly, it may not be possible to set the correct thread tension. If the correct thread tension cannot be achieved, rethread the upper thread and insert the bobbin correctly.
  • If the tension dial is set extremely low, the machine may stop stitching during sewing. This is not a sign that anything's broken. Simply increase the tension slightly to continue sewing.

Connecting character patterns

If the character pattern is too long to fit in the embroidery frame, follow the steps below.

Example: Connecting "ABC" with "DEF"

1 Enter "ABC" and press

A B C A B C D E F G H I J K L M N A a L M S DELETE CHECK MM>8 AD- JUST

2 Press ☑ Turn off the automatic thread cutting (☐)

ABC DELETE A B C D E F CHECK WW 100% + - +

3 Press (Back key).

ABC DELETE ABCDEFG [CHKF] 100% 8 - +

4 Press AD-JUST

A B C A B C D E F G H T J K L M N A a L M S DELETE CHECK W > 6 AD- JUST

5 Press LAY·OUT

1/1 BLACK A B C MULTI COLOR CHECK y-4 LAY- OUT

6 Press turn it to .

ABC cm SIZE LAYOUT 3.6 ↑+0.00 8.7 ←+0.00

The stitching starting point is set to lower left of the design.

7 Lower the presser foot, and then press ⏻/ ⏻ (Start/stop switch) to begin sewing.

8 When embroidering is finished, trim the thread leaving the end of the thread longer than usual. Then reset the fabric in the embroidery frame, in a position where you can sew "DEF".

ABC ① ②

① Embroidery start position
② Embroidery end position

9 Enter "DEF" and press AD-JUST

DEF DELETE CHECK GHTJKL AD-JUST MN Aa LMS

10 Press LAY OUT

1/1 BLACK DEF MULTI COLOR CHECK y-4 LAY- OUT

11 Press turn it to.

DEF cm SIZE LAY OUT 3.3 ↑+0.00 7.5 ←+0.00

The stitching starting point is set to lower left of the design.

12

Use (change position keys) to move the needle to the embroidery end position of "ABC".

ABC ①

① Embroidery end position

13

Lower the presser foot, and then press START/↑ (Start/Stop button) to embroider "DEF".

ABCDEF

14

When you have finished embroidering, cut the thread.

Resewing

When the wrong upper thread color has been sewn, it can be resewn with the correct color.

1

Press (Start/stop button) to stop the sewing machine.

2

Press AD-JUST

2/4 FRESH GREEN CHECK COLOR VII>6 AD- JUST

3

Press

2/4 FRESH GREEN CHECK COLOR LAYOUT

4

Press Back one color) to return to the beginning of the mistaken color. Press one more time to go to previous color.

2/4 FRESH GREEN 1/4 HARVEST GOLD

5

Set up the correct color for the upper thread.

6

Press (Start/stop button) to continue the design.

Thread runs out partway through a design

When the upper thread or the bobbin thread runs out while sewing, the sewing machine stops. Move the needle back about 10 stitches and resume sewing.

BABY LOCK Sofia BL137A - Thread runs out partway through a design - 1

Memo

- When the bobbin thread runs out, cut the threads and remove the embroidery frame before replacing the bobbin thread.

1 Set the upper thread or bobbin thread.

BABY LOCK Sofia BL137A - Set the upper thread or bobbin thread. - 1

Press

BABY LOCK Sofia BL137A - Set the upper thread or bobbin thread. - 2

1/4 W137/2220 CHECK COLOR VALL>8 AD- JUST

BABY LOCK Sofia BL137A - Set the upper thread or bobbin thread. - 4

Memo

- If the needle count is not displayed, display the needle count on the screen. For details, refer to "Stopping while embroidering" (page 148).

BABY LOCK Sofia BL137A - Memo - 1

Press

BABY LOCK Sofia BL137A - Memo - 2

1/4 ¥137/2220 CHECK COLOR ¥-4 LAY- OUT

BABY LOCK Sofia BL137A - Memo - 4

Press Back one stitch) to move the needle back about 10 stitches.

Forward one stitch) increases the stitch number.

1/4 ¥137/2220

BABY LOCK Sofia BL137A - Memo - 6

Restart the embroidery.

1/4 ¥127/2220

Stopping while embroidering

If the embroidery is stopped before it is complete, check the current needle count and layout before turning off the sewing machine.

BABY LOCK Sofia BL137A - Stopping while embroidering - 1

Memo

- When the sewing machine is turned off, the embroidery size and layout return to the original setting. If you have changed the layout, you need to adjust it again.

1 Press (Start/stop button) to stop the sewing machine.

2 Check the current needle count on the screen and make a note of it.

2/4 ¥467/2220 CHECK COLOR VALLS AD- JUST

If the needle count is not displayed, press

(Settings key), and then use

display the following screen.

Press to return to the previous screen.

[NAME OF COLOR] mm

[NEEDLE COUNT] [----] [mm]

3 Press (Embroidery key).

2/4 V467/2220 CHECK COLOR WIL>€ AD- JUST

The confirmation message is displayed.

4 Press OK.

OK to delete the selected pattern? CANCEL OK

The selected pattern is turned off, and it returns to the initial embroidery screen.

5 Turn off the sewing machine.

BABY LOCK Sofia BL137A - Turn off the sewing machine. - 1

Note

● Always detach the embroidery unit when you move the sewing machine.

6 Turn on the sewing machine, and then select the pattern.

Memo

- If you have changed the embroidery size and/or layout before turning off the machine, make the same setting changes again before restarting embroidering. For details, refer to "Adjusting the layout and the size" (page 143).

7 Press AD-JUST

1/4 W0/2220 CHECK COLOR W1>6 AD- JUST

8 Press

1/4 0/2220 CHECK COLOR LAYOUT

9 Press forward one color) to move to the beginning of the color you want to embroider.

1/4 0/2220

10 Press (Forward one stitch) to increase the needle count.

If □ pressed continuously, it moves forward 1 →9 →30 stitches.

1/4 ¥429/2220

Move forward to about 10 stitches before the total number of stitches confirmed in 2.

2/4 ¥457/2220

11 Restart the embroidery.

Using the Memory Function

Embroidery data precautions

Observe the following precautions when using embroidery data other than that created and saved in this machine.

BABY LOCK Sofia BL137A - Embroidery data precautions - 1

CAUTION

- When using embroidery data other than our original patterns, the thread or needle may break when sewing with a stitch density that is too fine or when sewing three or more overlapping stitches. In that case, use one of our original data design systems to edit the embroidery data.

■Types of Embroidery Data that can be Used

- Only .pes and .dst embroidery data files can be used with this machine. Using data other than that saved using our data design systems or sewing machines may cause the embroidery machine to malfunction.

■ Computers and Operating Systems with the Following Specifications can be Used

- Compatible models:

IBM PC with a USB port as standard equipment

IBM PC-compatible computer equipped with a USB port as standard equipment

- Compatible operating systems:

Microsoft Windows Me/2000/XP/Vista

(Windows 98SE requires a driver. Download the driver from our web site (www.babylock.com).)

■Precautions on Using the Computer to Create and Save Data

- If the file name of embroidery data cannot be identified, for example, because the name contains special characters, the file is not displayed. If this occurs, change the name of the file. We recommend using the 26 letters of the alphabet (uppercase and lowercase), the numbers 0 through 9, “-”, and “.”

- .pes files saved with the number of stitches, the number of colors and the number of combined patterns exceeding the specified limits cannot be displayed. Use one of our original data design systems to edit the embroidery pattern so that it meets the specifications.

- Do not create folders in "Removable Disk" on a computer. If embroidery data is saved in a folder in "Removable Disk", that embroidery data cannot be retrieved by the machine.

- Even if the embroidery unit is not attached, the machine will manage embroidery data.

■Tajima (.dst) Embroidery Data

- .dst data is displayed in the pattern list screen by file name (the actual image cannot be displayed). Only the first eight characters of the file name can be displayed.

- Since Tajima (.dst) data does not contain specific thread color information, it is displayed with our default thread color sequence. Check the preview and change the thread colors as desired.

■Trademarks

• IBM is a registered trademark or a trademark of International Business Machines Corporation.
- Microsoft and Windows are registered trademarks or trademarks of Microsoft Corporation.

Each company whose software title is mentioned in this manual has a Software License Agreement specific to its proprietary programs.

All other brands and product names mentioned in this manual are registered trademarks of their respective companies. However, the explanations for markings such as ^ and ^TM are not clearly described within the text.

Saving patterns

The embroidery patterns and the alphanumeric characters you have customized can be saved in the sewing machine's memory.

Since the saved patterns will not be erased when the power is turned off, you can always retrieve them for embroidery. This is convenient for saving names and the like. You can save up to 12 patterns or 512KB of data.

■Saving a pattern

① After selecting the pattern to be saved, press (Memory key).

come DELETE a b c d e f CHECK g h i j k l >6 m n A a L M S AD- JUST

"Saving..." appears while the pattern is being saved. After the pattern is saved, the initial screen appears again.

BABY LOCK Sofia BL137A - ■Saving a pattern - 2

Note

- Do not turn off the sewing machine while the pattern is being saved, otherwise the pattern data may be lost.

■Retrieving a pattern

BABY LOCK Sofia BL137A - ■Retrieving a pattern - 1

Press

BABY LOCK Sofia BL137A - ■Retrieving a pattern - 2

(Retrieve

key).

Row of eight icons with letters and symbols, including butterfly, heart, document, and folder

The saved patterns are displayed.

2 Select the pattern you wish to retrieve. Switch screens using (Previous page key) and (Next page key).

25/512KB < P1/P2> Wel com ① ②

① Total amount of memory used/Total amount of memory space
② Number of the currently displayed page from the total number of pages
The selected pattern is shown in reverse highlighting.

3 Press To delete the saved pattern, press .DELETE

25/512KB < P1/P2> Wel com

The saved pattern is retrieved.
The sewing screen appears, and you can embroider the retrieved pattern.

1/1 BLACK W e l c CHECK COLOR WITH AD- JUST

Retrieving embroidery patterns from the computer

1 Plug the USB cable connectors into the corresponding USB port connectors on the computer and on the machine.

Diagram showing a sewing machine connected to a laptop, with labeled parts and wiring instructions in Chinese.

① USB port connector for computer
② USB cable connector

BABY LOCK Sofia BL137A - Retrieving embroidery patterns from the computer - 2

Memo

● The USB cable can be plugged into the USB port connectors on the computer and machine whether or not they are turned on.
● Embroidery patterns can be retrieved with or without the embroidery unit attached to the machine.
● The USB cable can be plugged into the USB port connectors on the computer and machine whether or not they are turned on.
● Embroidery patterns can be retrieved with or without the embroidery unit attached to the machine.

BABY LOCK Sofia BL137A - Memo - 1

2 The "Removable Disk" icon appears in "My Computer" on the computer.

My Computer File Edit View Favorites Tools Help Back Search Folders Systems Tasks View system information Add remote programs Change waiting Check this disk Files Stored on This Computer Shared Documents My Documents Hard Disk Drives Local Disk (C:) DATA(ES) WINGE (E:) Local Disk (F:) DATA2 (G:) Other Places My Network Places My Documents Shared Documents Control Panel Devices with Removable Storage 3% Floppy CD Drive (H:) Continuous Disk (I:) Details Removable Disk (L:) Removable Disk

3 Copy the pattern data to "Removable Disk".

ResponseFile (F) File Edit View Favorites Tools Help Back Search Folders File and Folder Tasks Make a new folder Publishing Folder to the Web Share the Folder Other Places My Computer My Documents Shared Documents My Network Files Details

▶ Pattern data in "Removable Disk" is written to the machine.

BABY LOCK Sofia BL137A - Memo - 4

Note

● While data is being written, do not disconnect the USB cable.
- Do not create folders within "Removable Disk". Since folders are not displayed, pattern data within folders cannot be retrieved.
● While the machine is sewing, do not write data to or delete data from "Removable Disk".

BABY LOCK Sofia BL137A - Note - 1
Press

BABY LOCK Sofia BL137A - Note - 2

Row of seven icons with letters and symbols, including butterfly, heart, document, and lock symbols

The saved patterns are displayed.

BABY LOCK Sofia BL137A - Note - 4

Select the pattern you wish to retrieve.

Switch screens using (Previous page key) and (Next page key).

① 108/476KB P2/P2> ② ③

① Total amount of memory used
② Total amount of memory space
③ Number of the currently displayed page from the total number of pages
The selected pattern is shown in reverse highlighting.

BABY LOCK Sofia BL137A - Select the pattern you wish to retrieve. - 2

Press

108/476KB < P2/P2 >

The saved pattern is retrieved.
The embroidery screen appears, and you can embroider the retrieved pattern.

BABY LOCK Sofia BL137A - Select the pattern you wish to retrieve. - 4

Adjust the pattern as desired, and then begin embroidering.

1/10 TANGERINE CHECK COLOR VIL>6 AD- JUST

BABY LOCK Sofia BL137A - Select the pattern you wish to retrieve. - 6

Note

- If there are 13 or more patterns saved in "Removable Disk", the patterns cannot be displayed. When the message "Reduce the number of patterns. Only up to 12 patterns can be handled." appears, delete patterns from "Removable Disk" so that it contains no more than 12 patterns. Then, close the error message, repeat the procedure starting from step 4 and then press to retrieve the pattern.

- If patterns copied to "Removable Disk" are not saved in the machine's memory, their data is lost when the machine is turned off. In order to retrieve patterns directly from the machine the next time that they are needed, save the data in the machine's memory before turning off the machine. For details, refer to "Saving patterns" (page 151).

BABY LOCK Sofia BL137A - Note - 1

5 APPENDIX

The various maintenance and troubleshooting procedures are described in this chapter.

Care and Maintenance 156

Troubleshooting 158

Upgrading Your Machine's Software....168

Index 169

Care and Maintenance

Simple sewing machine maintenance operations are described below.

Cleaning the machine surface

If the surface of the machine is dirty, lightly soak a cloth in neutral detergent, squeeze it out firmly, and then wipe the surface of the machine. After cleaning it once with a damp cloth, wipe it again with a dry cloth.

BABY LOCK Sofia BL137A - Cleaning the machine surface - 1

CAUTION

●Unplug the power supply cord before cleaning the machine. Otherwise, injuries or an electric shock may occur.

Cleaning the race

Sewing performance will suffer if dust collects in the bobbin case. Therefore, it should be cleaned periodically.

1

Turn off the sewing machine.

BABY LOCK Sofia BL137A - 1 - 1

2

Unplug the power supply cord from the power supply jack on the right side of the sewing machine.

BABY LOCK Sofia BL137A - 2 - 1

CAUTION

●Unplug the power supply cord before cleaning the machine. Otherwise, injuries or an electric shock may occur.

3

Remove the flat bed attachment or the embroidery unit if either is attached.

4

Loosen the presser foot holder screw and remove the presser foot holder(page 45), and then loosen the needle clamp screw and remove the needle (page 41).

Technical diagram showing mechanical assembly with numbered components and a green curved arrow indicating rotation or motion

① Presser foot holder
② Presser foot holder screw
③ Needle clamp screw

5

Grasp both sides of the needle plate cover, and then slide it toward you.

BABY LOCK Sofia BL137A - 5 - 1

natural_image Illustration of a hand holding a device with a green arrow pointing to a component, no text or symbols present.

① Needle plate cover
The needle plate cover is removed.

6

Remove the bobbin case. Grasp the bobbin case, and then pull it out.

Diagram showing a hand operating a mechanical component with a green arrow indicating a specific part, labeled with number ①.

① Bobbin case

7 Use the cleaning brush or a vacuum cleaner to remove any lint and dust from the race and bobbin thread sensor and their surrounding area.

Technical diagram showing mechanical assembly with numbered components and a magnified inset view of a component detail.

① Cleaning brush
② Race
③ Bobbin thread sensor

BABY LOCK Sofia BL137A - 6 - 3

Note

● Do not apply oil to the bobbin case.
- If lint or dust collects on the bobbin thread sensor, the sensor may not operate correctly.

8 Insert the bobbin case so that the projection on the bobbin case aligns with the spring.

BABY LOCK Sofia BL137A - Note - 1

natural_image Illustration of hands operating a computer motherboard with a green indicator light (no text or symbols)

Technical diagram of a mechanical assembly with labeled parts and directional arrow indicating rotation or movement

Technical diagram of a mechanical assembly with numbered parts, likely illustrating a gear or cam mechanism.

① Bobbin case
② Projection
③ Spring

BABY LOCK Sofia BL137A - Note - 4

Memo

- Move the bobbin case right and left to make sure that the right side of the projection touches the spring and there is a space on the left side of the projection.

9 Insert the tabs on the needle plate cover into the needle plate, and then slide the cover back on.

Diagram showing a hand holding a device with a green arrow pointing to a component labeled ①, likely illustrating a process or operation.

① Needle plate cover

BABY LOCK Sofia BL137A - Memo - 2

CAUTION

●Never use a bobbin case that is scratched. Otherwise, the upper thread may become tangled, the needle may break or sewing performance may suffer. For a new bobbin case (part code: XE3152-221, green marking), contact your nearest authorized retailer.
●Be sure that the bobbin case is correctly installed, otherwise the needle may break.

Troubleshooting

If the machine stops operating correctly, check the following possible problems before requesting service. If the problem persists, contact your authorized retailer.

Symptom Probable Cause Remedy Reference
The sewing machine does not operate.The machine is not turned on. Turnon the machine. page 17
The start/stop button was not pressed.Press the start/stop button. page 51
The presser foot lever is raised. Lower the presser foot lever. page 50
The start/stop button was pressed, even though the foot controller is connected.Do not use the start/stop button when the foot controller is connected. To use the start/stop button, disconnect the foot controller.page 51
The bobbin winder shaft is on the right side after winding the bobbin.Slide the bobbin winder shaft to the left.page 26
The needle breaks.The needle is incorrectly installed. Correctly install the needle.page 41The
Use the screwdriver to firmly tighten the screw.
The needle is bent or blunt. Replace the needle.
The combination of fabric, thread and needle is not correct.Select a thread and needle that are appropriate for the type of fabric being sewn.page 39
The presser foot that is used is not appropriate for the type of stitch that you wish to sew.Attach the presser foot that is appropriate for the type of stitch that you wish to sew.page 70
The upper thread tension is too tight.Loosen the upper thread tension. page 59
The fabric is pulled too much. Lightly guide the fabric. -
The spool is incorrectly installed.Correctly install the spool.page 31
The area around the hole in the needle plate is scratched, or has a burr on it.Replace the needle plate. Contact your authorized retailer.-
The area around the hole in the presser foot is scratched, or has a burr on it.Replace the presser foot. Contact your authorized retailer.-
The bobbin case is scratched, or has a burr on it.Replace the bobbin case. Contact your authorized retailer.-
A bobbin designed specifically for this machine is not used.Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine.page 22
The needle breaks.The upper thread was not threaded correctly.Correct the upper threading. page 32
SymptomProbable CauseRemedyReference
The upper thread breaks.The upper thread was not threaded correctly (for example, the spool is not installed correctly, the spool cap is too big for the spool being used, or the thread has come out of the needle bar thread guide.)Correct the upper threading. Use the spool cap that best fits the size of the spool being used.page 31
There are knots or tangles in the thread.Remove any knots or tangles.-
The selected needle is not appropriate for the thread being used.Select a needle that is appropriate for the type of thread being used.page 39
The upper thread tension is too tight.Loosen the upper thread tension. page 5959
The thread is tangled, for example, in the bobbin case.Remove the tangled thread. If the thread is tangled in the bobbin case, clean the race.page 156
The needle is bent or blunt. Replace the needle.page 41
The needle is incorrectly installed. Correctly install the needle.
The area around the hole in the presser foot is scratched, or has a burr on it.Replace the presser foot. Contact your authorized retailer.-
The bobbin case is scratched, or has a burr on it.Replace the bobbin case. Contact your authorized retailer.-
A bobbin designed specifically for this machine is not used.Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine.page 22
Bobbin thread does not wind neatly on the bobbin.The thread is not passed through the bobbin-winding thread guide correctly.Correctly pass the thread through the bobbin-winding thread guide.page 24
Bobbin spins slowly.Move the sewing speed controller to the right (so that the speed will be fast).page 25
The thread that was pulled out was not wound onto the bobbin correctly.Wind the thread that was pulled off around the bobbin five or six times clockwise.page 25
The lower thread is tangled or breaks.The bobbin thread is incorrectly installed.Correctly install the bobbin thread. page 22
The bobbin is scratched or does not rotate smoothly, or has a burr on it.Replace the bobbin.-
The thread is tangled.Remove the tangled thread and clean the race.page 156
A bobbin designed specifically for this machine is not used.Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine.page 22
The thread is tangled on the wrong side of the fabric.The upper thread was not threaded correctly.Correct the upper threading. page 32
The thread tension is incorrect.The upper thread was not threaded correctly.Correct the upper threading. Make sure that the thread is hanged on the thread guide spring which is on the left side of the thread guide cover.page 32, page 33
The bobbin thread is incorrectly installed.Correctly install the bobbin thread. page 27
The combination of fabric, thread and needle is not correct.Select a thread and needle that are appropriate for the type of fabric being sewn.page 39
The presser foot holder is incorrectly installed.Correctly install the presser foot holder.page 45
The thread tension is incorrect.Adjust the tension of the upper thread.page 59
A bobbin designed specifically for this machine is not used.Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine.page 22
The upper thread is too tight.The bobbin thread is incorrectly installed.Correctly install the bobbin thread. page 22
The fabric is wrinkled.The upper thread was not threaded correctly, or the bobbin is incorrectly installed.Correctly thread the upper thread and correctly install the bobbin thread.page 22, page 31
The spool is incorrectly installed.Correctly install the spool. page 31
The combination of fabric, thread and needle is not correct.Select a thread and needle that are appropriate for the type of fabric being sewn.page 39
The needle is bent or blunt. Replacethe needle. page 41
If thin fabrics are being sewn, the stitch is too coarse.Shorten the stitch length or sew with stabilizer material under the fabric.page 59, page 66
The thread tension is incorrect.Adjust the tension of the upper thread.page 59
Stitches are skipped.The upper thread was not threaded correctly.Correct the upper threading. page 32
The combination of fabric, thread and needle is not correct.Select a thread and needle that are appropriate for the type of fabric being sewn.page 39
The needle is bent or blunt. Replacethe needle. page 41
Stitches are skipped.The needle is incorrectly installed.Correctly install the needle. page 41
Dust has accumulated under the needle plate or in the bobbin case.Remove the needle plate cover and clean the race.page 156
A high-pitched noise is made while sewing.Dust has accumulated in the feed dogs or in the bobbin case.Clean the race. page 156
The upper thread was not threaded correctly.Correct the upper threading. page 32
The bobbin case is scratched, or has a burr on it.Replace the bobbin case.Contact your authorized retailer.-
A bobbin designed specifically for this machine is not used.Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine.page 22
The thread does not pass through the eye of the needle.The needle has not been raised to the correct position.Press the needle position button. page 32
The needle is incorrectly installed. Correctly install the needle. page 41
The stitch is not sewn correctly.The presser foot that is used is not appropriate for the type of stitch that you wish to sew.Attach the presser foot that is appropriate for the type of stitch that you wish to sew.page 70
The thread tension is incorrect.Adjust the tension of the upper thread.page 59
The thread is tangled, for example, in the bobbin case.Remove the tangle thread. If the thread is tangled in the bobbin case, clean the race.page 156
The fabric does not feed.The feed dogs are lowered. Slide the drop feed lever to the right. page 102
The stitch is too fine. Lengthen the stitch length. page 59
The presser foot that is used is not appropriate for the type of stitch that you wish to sew.Attach the presser foot that is appropriate for the type of stitch that you wish to sew.page 70
The thread is tangled, for example, in the bobbin case.Remove the tangled thread. If the thread is tangled in the bobbin case, clean the race.page 156
The fabric feeds in the opposite direction.The feed mechanism is damaged. Contact your authorized retailer. -
The needle threader lever does not lower to the correct position.The needle has not been raised to the correct position.Press the needle position button. page 32
The sewing lamp does not come on.The sewing lamp is damaged. Contact your authorized retailer.-
The machine is not turned on. Turn on the machine. page 17
Nothing appears in the LCD.The brightness of the LCD is either too light or too dark.Adjust the brightness of the LCD.page 167
Machine does not operate when embroidery key is pressed.The embroidery unit is not attached.Attach the embroidery unit.page 123
Embroidery unit does not move.No pattern selected. Select a pattern.page 132
The embroidery unit is not set up correctly.Set the embroidery unit up correctly.page 123
Embroidery not neatly done.The fabric is not fully stretched on the embroidery frame. The fabric is loose.Stretch the fabric properly on the embroidery frame.page 127
No stabilizer material is attached.Always use stabilizer material for embroidery.page 126
The thread is tangled and the bobbin case, etc., is plugged up.Remove the tangled thread. When the bobbin case is plugged up, clean the race.page 156
The thread tension is incorrect.Adjust the tension of the upper thread.page 145
The upper thread was not threaded correctly.Correct the upper threading. Make sure that the thread is hanged on the thread guide spring which is on the left side of the thread guide cover.page 32, page 33
The bobbin thread is incorrectly installed.Correctly install the bobbin thread.page 22
Objects are placed near the carriage or embroidery frame.If the embroidery unit carriage or embroidery frame bumps into objects, the pattern will be misaligned. Do not place objects within the range of embroidery frame motion.page 124
Material coming out of the embroidery frame is causing problems.Stretch the fabric on the frame once again so that the material coming out of the embroidery frame does not cause problems, rotate the pattern and embroider.-
A heavy fabric is being embroidered, and the fabric is hanging off the table.If embroidery is done with the fabric hanging off the table, the embroidery unit movement will be impaired. Support the fabric while embroidering.-
The fabric is catching. It is pinched.Stop the sewing machine and set the fabric up correctly.-
The carriage was moved while the embroidery frame was being removed or attached during embroidery.If the carriage is moved during the process, the pattern may be misaligned. Be careful when removing or attaching the embroidery frame.-

Error messages

When erroneous operations are performed messages and advice on operation will be displayed on the LCD. Follow what is displayed. If you press or close the operation correctly while the error message is displayed, the message disappears.

NoError Message ProbableCause
1⚠ Can not recognize the data.The data may be corrupted.There is a possibility that the data for the selected pattern is corrupted.
2⚠ Cannot sew on this screen.Either the start/stop button or the reverse/reinforcement stitch button was pushed at a LCD screen other than the sewing LCD screen.
3⚠ Change the speed controller mode to “OFF”.The start/stop button was pressed without connecting the foot controller when the setting for adjusting the stitch width using the sewing speed controller is set to "ON".You have selected a pattern for which the stitch width control cannot be used. (page 58)
4⚠ Change to the single needle mode, and replace the needle.CANCEL W+WThe twin needle setting is selected while a pattern that cannot be sewn with the twin needle is selected.
5⚠ Check and rethread the upper thread.Upper thread broken.Upper thread not set up correctly.Upper thread has run out.CAUTIONBe sure to rethread the machine. If you press (Start/stop button) without rethreading the machine, the thread tension may be wrong or the needle may break and cause injury.
6Deleting...The machine is deleting a previously saved pattern while in embroidery edit mode.
7⚠ Disconnect the foot controller.The start/stop button was pressed while the foot controller was connected.You tried to use the foot controller for embroidery.
8⚠ Do not send a USB transmission while embroidering.While embroidering, data is written to the “Removable Disk” in the connected computer or data is deleted from the “Removable Disk”.
9Insert an embroidery card.BABY LOCK Sofia BL137A - Error messages - 1 on the LCD was pressed when no card was inserted.
10Lift the buttonhole lever.A stitch other than the buttonhole, bar tack or darning stitch was selected and the start/stop button was pressed while the buttonhole lever is lowered.
11Lower the buttonhole lever.The buttonhole, bar tack or darning stitch was selected and the start/stop button was pressed while the buttonhole lever is raised.
12Lower the presser foot lever.The start/stop button, reverse/reinforcement stitch button or thread cutter button was pressed while the presser foot was raised.
13Not enough available memory. Delete another pattern?
14OK to delete the selected pattern?You pressed the back key or the embroidery key when a pattern was selected or the utility stitch key when a stitch is selected.
15OK to save the current settings?You changed the stitch pattern settings, and then tried to save them by pressing the manual memory key.
16Press the needle position button to raise the needle.You tried to select an embroidery pattern or change the layout when the needle was down.The machine is turned on while the needle is lowered and the embroidery unit is attached.
17Raise presser foot lever.You tried to initialize the embroidery unit with the embroidery foot lowered.
18Reduce the number of patterns. Only up to 12 patterns can be handled.When 13 or more patterns are in “Removable Disk”, a pattern was being retrieved.
19Retrieve the pattern.The start/stop button was pressed after selecting a pattern which is saved in the machine's memory or entered from the USB port without pressing [RE]eve key).
20Return the bobbin winding shaft to left.The reverse/reinforcement stitch button, needle position button or thread cutter button was pressed while the bobbin winder shaft is moved to the right.
21A pattern is being saved.
22Select a pattern.The start/stop button or reverse/reinforcement stitch button was pressed when no pattern is selected.
23The bobbin thread is running out.Bobbin thread has run out. Little bobbin thread remains.
24The carriage of embroidery is attached. When the embroidery is attached.
25The pattern is closed by member of character the embroidery frame.
26The safety device has been activated.The upper thread has become tangled around the bobbin case, and the needle is bent and hitting the needle plate, etc., so the sewing machine stops (refer to page 158).
NoError Message Probable Cause
27This button does not operate when the embroidery unit is attached.
28This embroidery card can not be used on this machine.
29This key does not operate when the embroidery unit is attached.
30This pattern cannot be used.
31Turn off the machine, and attach the embroidery unit.
32The bobbling of bobinding the thread...

Adjusting the LCD

If nothing appears in the LCD when the sewing machine is turned on, the brightness of the LCD is either too light or too dark. In such a case, perform the following operation.

BABY LOCK Sofia BL137A - Adjusting the LCD - 1

Turn off the sewing machine.

BABY LOCK Sofia BL137A - Adjusting the LCD - 2

BABY LOCK Sofia BL137A - Adjusting the LCD - 3

Turn the power on while pressing any of the operation panel keys except (Setting key).

User interface toolbar with navigation buttons and icons, likely from a software application

BABY LOCK Sofia BL137A - Adjusting the LCD - 5

Press or . +

BRIGHTNESS - +

BABY LOCK Sofia BL137A - Adjusting the LCD - 7

Turn off the sewing machine, then turn it on again.

Operation beep

Each time a key is pressed you will hear one beep. If an incorrect operation is performed you will hear two or four beeps.

■If a key is pressed (correct operation)

One beep sounds.

■If an incorrect operation is performed

Two or four beeps sound.

■If the machine locks up, for example, because the thread is tangled

The sewing machine beeps for four seconds and the machine automatically stops.

Be sure to check for the cause of the error, and correct it before continuing to sew.

■Canceling the operation beep

When the sewing machine is purchased, it is set to beep each time an operation panel key is pressed. This setting can be changed so that the machine does not beep.

BABY LOCK Sofia BL137A - Operation beep - 1

Turn on the sewing machine.

BABY LOCK Sofia BL137A - Operation beep - 2

The LCD comes on.

BABY LOCK Sofia BL137A - Operation beep - 3

Press (Setting key) in the operation panel.

Screenshot of a software toolbar with icons for file operations, navigation, and editing tools

The setting screen appears.

BABY LOCK Sofia BL137A - Operation beep - 5

Press (Next page key) twice.

BABY LOCK Sofia BL137A - Operation beep - 6

Press OFF for the buzzer.

BUZZER ON OFF OPENING ON OFF INITIAL POSITION [ ENGLISH ]

The screen for changing the beep setting appears.

BABY LOCK Sofia BL137A - Operation beep - 8

Press (Back key).

BUZZER ON OFF OPENING ON OFF INITIAL POSITION [ ENGLISH ]

The initial stitch screen appears again.

Upgrading Your Machine's Software

You can use a computer to download software upgrades for your sewing machine. Visit our website at www.babylock.com for notification of available updates.

BABY LOCK Sofia BL137A - Upgrading Your Machine's Software - 1

Note

  • Be sure to download the upgrade file for this model from our web site. An upgrade file for any different model cannot be downloaded.
  • Refer to the "Changing the machine settings" (page 19) for how to check the version of the sewing machine's software.

BABY LOCK Sofia BL137A - Note - 1

Memo

● The embroidery pattern which is saved in the sewing machine will not be deleted if you upgrade the software.
● While the software is being upgraded, the buzzer will not sound when a key is pressed.

1 While holding (Settings key) pressed, turn on the machine.

The following screen appears.

Press LOAD after saving the upgrade file in the machine. LOAD

2 Plug the USB cable connectors into the corresponding USB ports on the computer and on the machine.

The "Removable Disk" icon appears in "My Computer" on the computer.

3 Copy the upgrade file to "Removable Disk".

Removable Disk (E:\) File Edit View Favorites Tools Help Back Search Favorites File and Folder Tools Movie some files Publish this folder to the links Share the links Other Places My Computer My Documents Shared Documents My Network Files Details

The message "Connected to PC. Do not disconnect the USB cable." appears.

4 When the screen shown in step 1 appears again, press LOAD

The message "Saving the upgrade file. Do not turn main power to OFF." appears.

5 When the following screen appears, upgrading is completed.

Upgrade complete.

BABY LOCK Sofia BL137A - When the following screen appears, upgrading is completed. - 2

Note

- If an error occurred, an error message appears. At this time, turn the machine off, and then start the procedure again from step 1.

6 Disconnect the USB cable, and turn the machine off, then on again.

Index

A

accessories 8,9

adjusting layout 143

adjusting stitch length 59

adjusting stitch width 57

adjusting thread tension 59,145

air vent 11

appliqué 97

appliqué pattern selection ....141

appliqué stitch 97

attaching presser foot holder 45

attaching stabilizer material 126

attributes 19

automatic reverse/reinforcement stitches ....61

automatic thread cutting 62

B

back key 13

bar tack stitch 103

basic sewing 48

basting stitch 78

beep 167

blind hem stitch 80

bobbin 22

bobbin case removal 156

bobbin cover 11

bobbin installation 27

bobbin thread, pulling up 29

bobbin winder 10

bobbin winder seat 26

bobbin winding 22

bobbin-winding thread guide 10,24

button sewing 88

buttonhole lever 11

buttonhole sewing 84

buttonhole stitching 83

buzzer 167

C

care 156

changing sewing direction 65

checking needle 40

cleaning bobbin case 156

cleaning brush 8

cleaning machine surface 156

concealed seams 90

connecting character patterns 146

country thread 19, 134

crazy quilt stitching 99

cuffs 46

curve sewing 65

cutting thread 55

cutting thread automatically 62

D

darning 106

darning stitch ....103

drop feed lever 11

E

elastic tape 95

embroidering 118, 139

embroidering pattern 139

embroidering steps 119

embroidery bobbin thread 8

embroidery card 138

embroidery card slot 11, 138

embroidery character selection ....136

embroidery data 150

embroidery foot installation 120

embroidery foot removal 122

embroidery frame 127

embroidery frame installation 130

embroidery frame removal ....131

embroidery key 13

embroidery pattern selection 132

embroidery pattern types 132

embroidery set 8

embroidery sheet 128

embroidery threads 118

embroidery unit connector slot 10

embroidery unit installation 123

embroidery unit removal 125

error messages 163

even seam allowance 67

extra spool pin 8,36

eyelet punch 8, 86, 108

eyelet stitching....108

F

fabric positioning 50

fagoting 110

fagoting stitch 109

feed dogs 11

flat bed attachment 10

foot controller 52

foot controller jack 11

frame pattern selection 137

fraying, preventing 74

free-arm sewing 46

free-motion quilting 102

front view 10

G

general sewing procedures 48

BABY LOCK Sofia BL137A - G - 1

H

handle 11

handwheel 11

heirloom stitching 114

help key 13

hook-and-loop fastener 66

|

installing bobbin 27

J

joining 114

joining stitch 97,109

L

layout adjustment 143

LCD 18,133

LCD button 134

LCD messages 163

LCD operation 18

M

machine surface cleaning 156

main power switch 11

maintenance 156

manual needle threading 36

memory key 13

mirroring stitches 63

N

needle bar thread guide 11

needle condition 40

needle plate 11

needle plate cover 11

needle plate marking 67

needle position button 12

needle position, changing 79

needle replacement 41

needle set 8

needle threader lever 10

needle threading 31

needles 39

next page key 13

0

operation beep 167

operation buttons 10, 12

operation keys 13

operation panel 10, 13

operation problems 158

operations 21

optional accessories 9

overcasting stitches 74

P

pant legs 46

parallel stitches ....36

patchwork 99

pattern embroidery 139

pattern retrieving ....151

piecing 99

piecing straight stitch 97

plug 17

positioning fabric 50

power supply cord ....17

power supply jack 11, 17

power switch 11, 17

preparations for embroidering ....118

presser foot 11

presser foot holder 11,45

presser foot holder installation 45

presser foot holder removal 45

presser foot lever 10

presser foot replacement ....43

previous page key 13

pulling up bobbin thread 29

Q

quick reference guide 8

quilting 100

quilting guide ....101

quilting stippling 97

quilting stitch 97

R

race 156

reinforcement stitching 53,103

release button 125

removing presser foot holder ....45

replacing needle 41

replacing presser foot 43

resewing 147

retrieving pattern 151

reverse stitching ....53

reverse/reinforcement stitch button 12,54

reverse/reinforcement stitches, automatic ....61

S

safety instructions ....1

saving patterns 151

scallop stitch ....109

scallop stitching ....111

screwdriver 8

seam allowance, even 67

seam ripper 8

securing stitching ....53

selecting alphanumeric characters 136

selecting embroidery patterns ....132

selecting stitches 49

selecting the needle 39

settings key 13

sewing basics ....48

sewing direction change 65

sewing machine help key 13

sewing speed controller 12

shell tuck stitch ....113

side cutter 76

smocking 112

smocking stitch 109

solving operation problems 158

spool cap 8,23,32

spool net 8,24

spool of thread 31

stabilizer material 126

start/stop button 12

stippling 97

stitch length adjustment 59

stitch selection 49

stitch settings 70

stitch width adjustment 57, 58

stopping embroidering 148

straight stitch 70, 78, 90

stretch fabrics 95

stretch stitch 95

T

thick fabrics 65

thin fabrics 66

thread cutter 10

thread cutter button 12,55

thread cutting 55

thread cutting, automatic 62

thread guide 10, 24, 33

thread guide cover 10, 24, 33

thread guide disk 11,34

thread spools 31

thread take-up lever 10,34

thread tension adjustment 59, 145

threading 31

threading bobbin 22

threading needle 31

threading needle manually ....36

tips 65

touch panel 13

trial sewing 65

triple stretch stitch 78, 95, 103

troubleshooting 158

turning machine on/off 16

twin needle 8

twin needle sewing 36

U

upper thread 31

upper thread spool 31

upper thread tension 59,145

upper threading 31

USB cable 152

USB port connector 152

utility stitch key 13

utility stitch selection screen 18

utility stitches 70

W

winding bobbin 22

wing needle 114

Z

zigzag stitches 75, 95, 97

zigzag width adjustment 57

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Product information

Brand : BABY LOCK

Model : Sofia BL137A

Category : Sewing machine