hobby 721 - Sewing machine PFAFF - Free user manual and instructions

USER MANUAL hobby 721 PFAFF

Black-and-white photo of a PFAFF sewing machine with gauges and control panel (no visible text or symbols on main body)

Some safety rules

a) Take care to avoid injury to your fingers by the needle,
b) Make sure you unplug the power cord whenever you have to leave the machine or want to clean it, oil it or change mechanical and accessory parts.
c) Be sure to use only a 15-watt light bulb in the sewing lamp.

Safety rules for United Kingdom see page 2

Technical diagram of a sewing machine with labeled parts and adjustment knobs

12 4 6 9 12 15 18 21 22 23 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

25 Bedpiate cover, enclosing sewing hook 26 Accessories compartment

18 Presser bar with thread cutter 19 Presser bar filter 20 Zigzag and utility-stitch knob 21 Utility-stitch, stretch-and fancy-stitch knob, Model 741 22 Reverse control 23 Bedipate 24 Base

10 Free-arm cover, enclosing sewing hook 11 Needle plate 12 Sewing foot holder with sewing lock 13 Needle holder with retaining screw 14 Thread guides 15 Threading slots 16 Needle thread tension 17 Free arm

9 Detachable work support with 8 Strike length control 7 Disengaging knob 6 Hand wheel 5 Bobbin winder and insert)

1 Take-up lever 2 Bobbin wider tension 3 Carrying handle 4 School fits (remove from accessories) 5 3 Area 6 2 Tensor del devanador 7 1 Palanca triangles 8 Maryland de cashon

Parts of the sewing machine

Technical line drawing of a sewing machine with numbered parts and component labels

Some safety rules valid for United Kingdom only

The wires in this mains lead are coloured according to following code:

Blue: Neutral

Brown: Live

As the colours of the wires in the mains lead of this appliance may not correspond with the colour coding of the terminals in your plug, proceed as follows: the wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black.

The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.

Please note:

When a 13-ampere plug is used a 3-ampere fuse has to be fitted.

Content: Indice er.

Technical line drawing of a mechanical assembly with two vertical rods and a central circular component (no text or symbols)

Inserting the spool pins

Two spool pins are included in the accessories. Insert these in the holes provided in the machine.

Technical line drawing of a mechanical clamp device showing front and side views (no text or symbols)

Removing the carry case, Model 340

Push both catches fully down (A), then allow them to move up (B).

Line drawing of a rectangular electronic device with a top panel and side ports, no text or symbols present.

Lift the case off.

Line drawing of an open electronic device casing with internal components (no text or symbols)

The foot control is stored in the upturned detachable work plate.

Line drawing of a rectangular briefcase with a handle and side panel, no text or symbols present

Removing the carry case, free-arm models

Fold down the carrying handle.

Line drawing of a rectangular electronic device with two mounting holes and a base (no text or symbols)

Lift off the case.

Technical diagram showing a device connected to a pressure gauge with labeled parts A and B

Electrical connection: Set the foot control on the floor. Insert plug A in the machine and plug B in the wall socket.

Conexión eléctrica

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

Bobbin winding preparations: Reach under work support 9 and pull it out towards the left.

Illustration of hands operating a sewing machine and a fabric device (no text or symbols present)

Remove bed plate cover 25 or fold free-arm cover 10 downwards.

Technical line drawing of a mechanical assembly with gears and levers (no text or symbols)

Raise latch A and pull out the bobbin case.

Line drawing of hands holding a small mechanical component with a flatter base (no text or symbols)

Release latch A and take out the bobbin.

Technical line drawing of a mechanical assembly with flanged components and a base plate (no text or symbols)

Place the bobbin on winder spindle 5.

Technical line drawing of a mechanical assembly with a flanged base and central component (no text or symbols)

Push the bobbin to the right against stop A.

Illustration of hands adjusting a mechanical component with a circular dial and rotation arrow (no text or symbols)

Disengaging the sewing mechanism: Hold hand wheel 6 firmly and turn knob 7 towards you.

Technical line drawing of a mechanical assembly with two springs and a rod, no text or symbols present

Placa a spool on one of the pins 4.

Technical line drawing of a mechanical assembly with a hand operating a tool (no text or symbols present)

Bobbin winding: Pull the thread from the spool into tensioner 2, to the bobbin, through one hole of the bobbin, then hold it there. Press the foot control to wind the bobbin. After a few turns, let go of the thread again. Push the filled bobbin to the left, remove it and cut the thread.

Line drawing of hands operating a camera lens with a rotary knob (no text or symbols)

Engaging the sewing mechanism: Hold the balance wheel firmly and turn knob 7 away from you.

Technical line drawing of four mechanical components with no visible text or symbols

Inserting the bobbin: With thread hanging down at back (A), pull it into slot B, under the spring and out of spring C.

Line drawing of a hand holding a small electronic device with three views: top view, side view showing internal components, and bottom view (no text or symbols)

Checking the bobbin thread tension: With a brief sharp upward movement of your hand, the bobbin must gradually slip downwards. (Turn screw A to the left for a weaker tension and to the right for a tighter tension.)

Technical line drawing of a sewing machine with a hand operating the base (no text or symbols present)

Inserting the bobbin case:

Open latch B and push the bobbin case onto pin C until it snaps in place. Bobbin case finger D must fit into cutout E.

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

Upper threading: The needle and the take-up lever must be raised. Pull the thread into guide A, slot B, behind guide C, upwards into slot D, into take-up lever 1, back through slot D, into guides E, F and into the right guide of the needle holder.

Line drawing of a sewing machine with gears and fabric (no text or symbols)

Thread the needle from front to back.

Line drawing of a sewing machine with clasp and base components (no text or symbols)

Hold the needle thread taut. Turn the hand wheel toward you until the needle moves down and up again. Pull the bobbin thread up by pulling the needle thread.

Technical line drawing of a sewing machine tool with clamping mechanism and base components (no text or symbols)

Place both threads towards the right under the sewing foot.

Illustration of hands operating sewing machines with a fabric being inserted (no text or symbols present)

Insert bedplate cover 25 or close free-arm cover 10.

Coloque la tapa 25 de la placa base o cierre la tapa 10.

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

Models 521–741 have a free arm for sewing tubular shaped articles.

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

Push the detachable work support onto the machine (guide pin in hole).

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

Place fabric under the sewing foot.

Technical line drawing of a mechanical component with a curved arrow indicating motion (no text or symbols)

Lower presser bar lifter 19.

Baje la palanca alzaprensatelas 19.

Line drawing of a shoe sole with a tool inserted, showing mechanical components and a directional arrow (no text or symbols)

Operating the foot control: The farther you press the pedal down the faster the machine runs.

Needle thread tension 16

A = Setting mark.

Checking the needle thread tension:

The normal setting is in the white range between 3 and 5. The higher the number, the tighter the tension. To check the tension, set the machine at a wide zigzag stitch.

Sew a short seam. The threads should interlock in the middle of the material.

Simple line drawing of a zigzag pattern inside a rectangular frame (no text or symbols)

Simple line drawing of a rectangular object with zigzag edges and a wavy line extending from its edge (no text or symbols)

Pure diagram of a wavy line pattern inside a rectangular boundary, no text or symbols present

Simple line drawing of a folded paper or sheet with zigzag lines, no text or symbols present.

Technical line drawing of a mechanical component with an arrow indicating motion (no text or symbols)

Raise presser bar lifter 19. Remove the fabric by pulling it towards the back.

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

Thread cutter A: Draw the threads into the slot and pull them downwards.

Technical diagram of a mechanical device with labeled components and directional arrows indicating motion or flow.

Setting the stitch length (8):

Set the required stitch length, from 0 to 4 mm, at mark A. The red setting range from 0 to 1 is for sewing buttonholes.

Diagram showing a hand pressing a button into a device with labeled parts and directional arrows indicating motion.

Reverse sewing:

Press down control 22. The machine sews backwards as long as the control key is held down.

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

For sewing stretch stitches (green), set the stitch length control at "S. S." Stretch stitches can be lengthened by turning the control towards "+" or shortened by turning it towards "-"

Technical diagram of a circular device with labeled components and internal symbols, including spring, buttons, and connectors.

Stitch pattern knob 20

Models 340-721

Turn the required stitch symbol to mark A. For a table of stitch patterns see pages 16/17.

Technical diagram of a dual-circular device with labeled components and wiring connections

Model 741

Zigzag- and utility-stitch knob 20

Turn the required stitch to mark A.

Stitch pattern setting knob 21

Turn the required stitch pattern to mark B.

For sewing the utility- and fancy stitches, zigzag setting knob 20 must be set at the widest zigzag stitch.

For a table of stitch patterns, see pages 18/19.

Modelo 741

Symbol/Simbolo isaret/Tákn	Stitch pattern table		Modeller
	Stitch		340	521	541	721	741
	Straight stitch, middle needle positionStraight stitch, left needle position		●	●	●	●	●
	Zigzag stitch range		●	●	●	●	●
	Buttonhole symbols				●	●	●
	Shell-edging stitch				●	●	●
	Elastic blind stitch				●	●	●
	Elastic seam			●	●	●	●
	Straight triple stretch stitch					●	●
	Zigzag triple stretch stitch					●	●
	Honeycomb stitch					●	●
	Pullover stitch					●	●
	Overlock stitch					●	●
	Fancy stitches						●

Technical line drawing of a sewing machine with levers and base plates (no text or symbols)

Changing the needle

(System 130/705 H):

Loosen screw A. Take out the needle. Push the needle (with its flat side facing towards the back) up as far as it will go. Tighten the screw.

Cambio de la aguja

(sistema 130/705 H):

Technical diagram showing mechanical assembly with labeled components and directional arrows (C, B)

Dropping the feed:

Remove bedplate cover 25 or free-arm cover 10. Push the drop-feed control to C = feed disengaged, and to B again for sewing.

Line drawing of a sewing machine needle stitching fabric, with no text or symbols present

Changing the sewing foot: To release the sewing foot, push the red button A.

Technical diagram of a mechanical component with labeled parts B and C, showing internal structure and directional arrows.

Attaching the sewing foot: Lower the presser bar lifter and at the same time reposition the sewing foot so that stud B fits in slots C.

Line drawing of a sewing machine needle stitching fabric, with hands operating the work (no text or symbols)

Hole E and screw D are used for attaching an edge guide, while screw F is the sewing foot holder screw.

Sewing feet (standard accessories)

1 Ordinary sewing 3 Blindstitch foot foot 4 Zipper
2 Clear-view foot

Technical line drawing of a sewing machine with internal components and a rotating mechanism (no text or symbols)

Accessory compartment:

(Models 521–741) To open accessory compartment raise cover of work support 9.

Technical line drawing of a mechanical device with internal components and a handle (no text or symbols)

Accessory compartment (Model 340)

Compartment is in right side of base (23).

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

Detachable work support (Model 340)

Attach the work support so that its two hooks engage in the openings on the base.

Line drawing of a sewing machine with a flat base and needle inserted (no text or symbols)

After attaching the support, push it downwards a little.

Technical diagram of a sewing machine with labeled parts A, B, and C

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

Topstitching

Sewing foot: Ordinary sewing foot or clear-view foot and edge guide (special accessory): Stitch: straight stitch

Edge guide A can be used with nearly all sewing feet.

Fitting the edge guide

(Special accessory): Push edge guide A through hole B and secure it in position with screw C. The guide can be adjusted to the desired stitching margin for various applications. With the edge guide attached, it is easy to sew parallel lines of stitches or to stitch parallel to the edge. The guide either follows an edge (Fig. D) or when making parallel lines of stitches runs along the preceding line of stitches (Fig. E). The seam thus made looks neat and accurate.

Pespunteados

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

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

Elastic blind stitch

Sewing foot: blindstitch foot

Tension: needle thread tension a little slack.

Thread: ordinary sewing thread

Stitch: elastic blind stitch

Stitch length: 3-4

Needle: size 70 or 80

How to regulate the needle penetration

Place the prepared hem under the blind-stitch sewing foot. The crease line of the outer fabric runs along edge guide B of the blindstitch sewing foot.

Turn screw A to adjust edge guide B so far to the left that the needle picks up only one thread of the outer fabric when penetrating on the left side (Figs. C and D). First make a sewing test using a piece of waste material.

Technical diagram showing a mechanical device with labeled parts A, B, and C, alongside a schematic of a tool or component.

Technical diagram showing a tool interacting with a striped component, labeled with numbers 1, 2, and 3, alongside a compass and detail view.

Sewing buttonholes

(Models 340 and 521)

Sewing foot: clear-view foot

Tension: needle thread tension a little slack

Thread: fine machine embroidery thread

Stitch length: buttonhole range (red)

Needle: sizes 70/80

1. Set zigzag stitch knob 20 to sew a buttonhole seam width of 2 mm, i. e. roughly at "B".

Sew the first buttonhole seam. At the end, the needle must be raised at the right. Turn knob 20 one place to the right.

1. Insert the needle at the right, raise the sewing foot, turn the material through 180°, set the knob at "B" again, lower the sewing foot and raise the needle.
2. Set the zigzag knob at "C" and sew about five tacking stitches. Raise needle at left.
3. Set knob at "B" and sew the second buttonhole seam as long as the first. Raise needle at left.
4. Set knob at "C" and sew about five tacking stitches. Raise the needle.
5. Set the knob at ☐ and sew a number of securing stitches. Cut buttonhole open with slitting knife (special accessory).

Pure mechanical diagram showing a tool or component with no text, numbers, or symbols

Sewing buttonholes (Models 541, 741)

Sewing foot: clear-view sewing foot Tension: needle thread tension a little slack

Thread: fine machine embroidery thread

Stitch length: buttonhole range (red) Utility-stitch knob 21 at

Model 741: red buttonhole symbol Needle: sizes 70 to 80

1. Set utility-stitch knob 20 at 📄 and sew the first buttonhole seam. Raise the needle.
2. Set knob 20 at Ⓐ and sew four to six tacking stitches. Raise the needle.
3. Set knob 20 at 📄 and sew the second buttonhole seam as long as the first. Raise the needle.
4. Set knob 20 at ☐ and sew four to six tacking stitches. Raise the needle.
5. Set knob 20 at ☐ and sew a few securing stitches.
6. Cut buttonhole with special knife (special accessory).

Line drawing of a sewing machine needle stitching a circular base, labeled A (no text or symbols on the diagram itself)

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

Sewing on buttons

Sewing foot: without sewing foot or with clear-view foot

Stitch: straight stitch, left needle position

Feed: dropped

Thread: fine sewing thread

Place the button in the location marked beforehand and push it under the sewing foot holder. Lower the sewing foot holder into the button. Lower the needle into the left hole of the button. Raise the needle. Turn knob 20 to a position in which the needle enters the right hole of the button when the hand wheel is turned. Sew six to eight zigzag stitches and a number of securing stitches in the left only (A).

Sewing on buttons with stems (for large buttons in heavy materials)

Lower the needle into the left hole. Place a match on the middle of the button.

Lower the sewing foot (B). Sew a number of zigzag stitches and leave a thread end of about 6 inches. Pull the needle-and bobbin threads through (C). Wrap the stem (D) and tie off the threads.

Costura de botones:

Technical line drawings of mechanical components labeled A and B, showing assembly or assembly details without any readable text or symbols.

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

Sewing in zippers

Sewing foot: zipper sewing foot

Stitch length: 2 to 3

Stitch: Straight stitch, middle

needle position

Thread: sewing thread

This is how the zipper foot is engaged. Insert the foot with the back pin in the back groove E and push the shoe of the foot upwards, until the front pin F snaps in. The zipper foot can be pushed to the positions: left (Fig. A), right, or centre.

Completely concealed zip closure

Baste in zip by hand first. Push the zipper foot to the left as far as it will go. Place the open zip under the foot so that its teeth run along the right guiding edge on the sole of the foot (Fig. B). Sew about half the length of the zip at the required width. Leave the needle down in the material, raise the zipper foot and close the zip (Fig. C). Lower the zipper foot again, continue the seam and then sew across the end.

Sew the other side of the zip at the same margin. Shortly before the end of the seam leave the needle down in the material, raise the zipper foot and open the zip (Fig. D). Lower the zipper foot again and sew to the end.

Simple line drawing of a V-shaped object with an arrow indicating rotation, labeled 'A' at the base (no text or symbols on the object itself)

Simple line drawing of a knitted fabric or rope being sewn inside a rectangular frame (no text or symbols)

Technical line drawing of a mechanical clamp or lifting device mounted on a rope, showing rope routing and clamping mechanism (no text or symbols)

Seam-like zipper closure

For machine setting see page 34 How the zipper is prepared and inserted:

Press the edges of the placket. Fold out the left seam allowance (Fig. A). Place the left side of the open zip in position so that its teeth protrude a little beyond the pressed edge (Fig. B). The seam is sewn along this edge.

Move the zipper foot to the middle so that the needle stitches into the middle opening. The zip teeth run into the left guiding groove in the foot (Fig. C). At the beginning of the seam lift up the teeth a little to feed them into the guiding groove. Sew the seam to the end and secure it.

Close zip. Pin other side of zip to material at beginning of seam (Fig. D). Open zip. Remove the pin, turn out the right seam allowance with the zip tape, and pin the latter to the fabric, as shown in Fig. E. The zip teeth now run into the right guiding groove in the foot (Fig. F). Finish sewing the zip. Now sew down the zip tape letting the zip teeth run along the guiding edge of the foot (Fig. G).

Technical line drawing of a sewing machine with levers and base mount (no text or symbols)

Simple line drawing of a container with a side panel and vertical lines, labeled 'B' (no text or symbols on the diagram itself)

Zippers in ladies' slacks

For machine setting see page 34.

Move the zipper foot to the left as far as it will go. Press the edges of the placket. Baste the closed zip to the right edge of the placket on the wrong side so that its teeth are still visible. Pin facing strip D to the underside and stitch it down at the same time as you sew the zip. The zip teeth run along the right guiding edge of the foot (Fig. A). Shortly before the end of the seam leave the needle down in the fabric, raise the zipper foot, open the zip, lower the zipper foot again and finish sewing the seam. Close the zip.

Pin the overlapping edge along the intended seam line. Baste left zip edge (Fig. B).

Open zip. Attach the edge guide and position it for the desired seam margin so that it moves along the edge of the fabric (Fig. C). Shortly before the end of the seam leave the needle down in the fabric, raise the zipper foot and close the zip. Lower the zipper foot and finish sewing the seam. Secure the end of the zip seam with a bartack.

Technical diagram of a sewing machine with labeled parts A, B, and C

Technical line drawing of a sewing machine needle with thread pattern (no text or symbols)

Darning

Preparing the machine:

Sewing foot: Darning foot (special accessory)

Stitch type: Straight stitch

Needle position: Centre

Tension: Ease needle thread tension

Thread: Fine machine embroidery thread Needle: Size 70

How to fit the darning foot

Remove the sewing foot holder, then secure the darning foot with screw A, making sure that wire B is resting on screw shank C.

First draw up the bobbin thread and hold both threads when beginning to sew. Then make a few stitches in the material. Stitch back and forth over the damaged area in serpentine fashion, as shown in Fig. D, rounding the end of each line. When the damaged spot is covered evenly, turn the fabric through 90° and darn over the preceding rows of stitches (Fig. E) until the damaged spot is covered.

On this type of work you determine the stitch length yourself by moving the fabric back and forward.

Zurcidos

Pure grid pattern with a downward arrow, no text or symbols present

E

Örerek tamir etmek

Technical line drawing of a mechanical assembly with tool holders and a brush attachment (no text or symbols)

Technical line drawing of mechanical components and assembly (no text or symbols)

Cleaning and oiling

Raise the needle and the sewing foot. Remove the two needle plate screws and take off the needle plate. Clean the feed dog with the brush. Push catches A of the sewing hook outwards. Take out ring B and sewing hook C. Clean the hook raceway. Apply a drop of oil to the hook raceway occasionally.

Caution: do not drop the sewing hook.

Engrase y limpieza

Pull out the mains plug. Push the bulb upwards, then in direction A and pull it out. Insert the new bulb so that the pins enter slots C, push the bulb upwards and turn it in direction B.

Using the adequate needle guarantees a better working up of the material.

Fabric weight: light Needle size: 60, 70, 75		Fabric weight: medium Needle size: 80, 90		Fabric weight: heavy Needle size: 100, 110, 120
Needle points
System & No.	Profile	Point & eye	Suitable for
130/705 H 70, 80		Light ball point	Universal needle for fine-meshed synthetics, fine linen, chiffon, batiste, organdy, woolens, velvet, fancy seams and embroidery work.
130/705 H-SUK 70, 110		Medium ball point	Coarse knitted fabrics, Lastex, double-jersey fabrics, Quiana and Simplex.
130/705 H-PS 75, 90		Medium ball point	Stretch-fabric needle developed especially for Pfaff. Particularly suitable for delicate stretch and knitted fabrics.
130/705 H-SKF 70, 110		Heavy ball point	Wide-meshed corsetry, Lycra, Simplex and Lastex.
130/705 H-J 90-110		Acute round point	Twill, workwear, heavy linen, blue jeans and light canvas.
130/705 H-LR 70-120		Narrow twist point	Leather, suede, calf and goatskin leathers.
130/705 H-PCL 80-110		Narrow wedge point with left-twist groove	Imitation leathers, plastic materials, plastic sheeting and oilcloth.
130 H-N 70-110		Light ball point, long eye	Seams topstitched with buttonhole silk or No. 30/3 synthetic thread.
130/705 H-WING 100		Hemstitching point	Attractive hemstitching on heavily dressed materials, organdy and glass cambric.

Needle chart

	System & No.	Stitch length	Stitch width	Needle spacing	Suitable for
	130/705 H-ZWI 80	2.5 mm2.5 mm	-	1.6 mm2.0 mm	Medium-wide cording
	130/705 H-ZWI 8090100	2.5 mm2.5 mm3.0 mm	-	2.5 mm3.0 mm4.0 mm	Wide cordingExtra wide cordingExtra-wide cording
Decorative designs sewn with twin needlesBefore you start sewing, turn the handwheel and check to make sure the needles stitch into the fabric properly. In this way, needle breakage can be largely prevented.
	Decorative and zigzag patterns
	130/705 H-ZWI 808080	0.5-1.5 mm0.5-1.5 mm0.5-1.5 mm	wide narrow narrow	1.6 mm2.0 mm2.5 mm	OrnamentationsOrnamentationsOrnamentations
[8402]	Special hemstitching twin needle
	130/705 H-ZWI-Ho 80100	2.0-3.0 mm2.0-3.0 mm	very narrow very narrow	-	Decorative hem-stitching effect.Heavily dressed fabrics are par-ticularly suitable.

Faults and how to remedy them

Cause:

Remedy:

1. Machine skips stitches

Needle not inserted correctly.

Push needle up as far as it will go, its flat shank side facing toward the back.

Wrong needle used.

Insert system 130/705 H needle.

Machine threaded improperly.

Check threading.

Needle too thin for thread used.

Select needle according to Needle Chart.

2. Needle thread breaks

For any of the above reasons.

See par. 1 above.

Thread tension too strong.

Regulate thread tensions.

Poor-quality or knotty thread used, or thread that has become too dry by excessive storage.

Use only good-quality thread.

3. Needle breaks

Needle not pushed up as far as it will go.

Insert new needle and push it up as far as it will go.

Needle bent.

Insert new needle.

Needle too thin or too thick.

See Needle Chart.

Needle bent and strikes needle plate because work is pushed or pulled.

Let machine feed the work alone.

Bobbin case improperly inserted.

Only guide the material lightly.

When inserting the bobbin case, push it in as far as it will go.

4. Seam is not uniform

Tension out of adjustment.

Check upper and lower tensions.

Thread too thick, knotty or hard.

Use first-class thread only.

Bobbin thread wound unevenly.

During bobbin winding, do not hold thread in hand, but pass it through the bobbin tension stud.

Kinks appear on top and bottom of material.

Thread machine properly and check both tensions.

Cause:

Remedy:

5. Machine feeds irregularly or not at all

Lint has accumulated between tooth rows of feed dog.

Remove needle plate and clean out lint.

Feed dog dropped. (Drop-feed control is at right.)

Flick drop-feed control to the left.

6. Machine runs with difficulty

Thread ends in hook raceway.

Remove thread ends and put a drop of oil into hook raceway.

7. Important notes:

Never run a threaded machine unless there is a piece of fabric under the sewing foot. If you have to leave the machine, even for a short while, be sure to switch off the master switch. This is particularly important when children are around.

Special accessories

The special accessories listed below are intended for special sewing jobs. They can be obtained from your dealer at an extra charge.

Accessory	Part No.	Sewing Operation
Appliqué foot	93-035 920-91	For appliqué work
Binder (remove sewing foot holder)	98-053 484-91	For binding edges with tape
Cording foot, 5 grooves(twin needle with 1.8-2.5 mm needle gauge)	93-035 950-91	For cording work(needle size 80,for fine cordingneedle size 70)
Cording foot, 7 grooves(twin needle with 1.4-1.8 mm needle gauge)	93-035 953-91
Fringe sewing foot	93-035 943-91	For sewing fringes and for basting
Edge guide	98-802 422-00	For top-stitching (wadding)
Straight-stitch foot	98-694 803-00	For topstitching andsewing very delicateand soft fabrics (silk jersey, etc.)
Needle plate with round needle hole	in preparation
Felling foot, 4.5 mm	93-035 946-91	For felled seams
Felling foot, 6.5 mm	93-035 948-91
Buttonhole foot	98-694 411-00	For sewing buttonholes
Shirring foot	93-035 998-91	For shirring valances
Single-needle cording foot	93-035 915-91	For single-needle cording
Overlock foot	98-620 404-00	For finishing raw edges or for joining elasticfabrics and simultaneously overcasting theiredges
Hemmer foot (rolled edge), 2 mm	98-694 804-00	For hemming edges with zigzag stitches
Hemmer foot, 3 mm	98-694 401-00	For hemming edges
Darning foot (remove sewing foot holder)	93-106 103-91	Darning fabric and wool
Teflon foot	98-694 801-00	For sewing plastic materials
Fancy-stitch foot	98-694 879-00	For sewing fancy patterns

Contents

Removing the carry case 3,4

Electrical connection 4

Bobbin winding preparations 5,6

Disengaging and engaging the sewing mechanism 6,8

Bobbin winding 7

Inserting the bobbin 8

Checking the bobbin thread tension 9

Inserting the bobbin case 9

Upper threading 10

Drawing up the bobbin thread 11

Operating the foot control 13

Needle thread tension 13

Checking the needle thread tension 13, 14

Thread cutter 14

Setting the stitch length 15

Reverse sewing 15

Sewing stretch stitches 16

Stitch pattern knob, Models 340-721 16

Zigzag- and utility-stitch knob, Model 741 17

Changing the needle 20

Dropping the feed 20

Changing the sewing foot 21

Sewing feet 22

Accessory compartment 22, 23

Detachable work support 23

Top-stitching 24, 25

Elastic blind stitch 26, 27

Sewing buttonholes, Models 340 and 521 28, 29

Sewing buttonholes, Models 541-741 30, 31

Sewing on buttons 32, 33

Inserting zippers 34, 35

Seam-like zipper closures 36, 37

Zippers in ladies' slacks 38, 39

Darning 40, 41

Cleaning and oiling 42

Changing the bulb 43

Needle chart 44, 45

Faults and how to remedy them 52, 53

Special accessories 60