PD 250/E - Uncategorized PROXXON - Free user manual and instructions

USER MANUAL PD 250/E PROXXON

• operation and maintenance

• spareparts list Please read carefully! Using this instruction manual will

• make it easier for you to get used to the machine,

• help prevent faults occurring due to improper use and

• increase the service life of your machine. Keep this instruction manual in an easily accessible place. Only operate this machine if you arequalified to do so and fol- low the guidelines in this instruction manual. PROXXON does not accept responsibility for the safe function- ing of the machine

• ifitishandled in amanner which constitutes improper use,

• ifitisused for other purposes which arenot specified in the instruction manual,

• ifthe safety regulations arenot observed. Warranty claims areinvalid if

• the machine is incorrectly operated,

• the machine has not been sufficiently maintained. In the interests of your safety,please always observe the safe- ty regulations. Only use genuine PROXXON spareparts. We reserve the right to make further alterations for the pur- pose of technical progress. We wish you every success with your machine. PROXXON GmbH Safety guidelines: Avoid untidiness in your working area. An untidy working area always means an increased accident risk. Remember that your working area needs to be cleaned of wood chips from time to time as well as during operation. Fasten the device to asolid surface and make sureitiseven. Also, always make surethat the device cannot fall down or top- ple during operation. Drill holes in the base have been provided for this purpose so that the planer can be screwed down to the surface. Check the device for signs of damage beforeeach use. Always check the cutting tools, the safety mechanisms, the connecting cable and the plug every time beforeyou start up the planing machine. Please note: Defective parts, particularly damaged safety mechanisms, may only be replaced by aspecialist or the PROXXON customer service. Only use original Proxxon spare parts. Do not manipulate your machine! Do not make any changes to the machine and do not manipu- late anything! Changes or manipulations could impair the mechanical and electrical safety,but your safety in particular would also be at risk due to electric shock and further adverse effects. Injuries and material damage could be the result. Never work without the designated safety mechanisms. Make sureinany event that the machine chuck guardisfolded down while working and that the motor cutoffoperates reliably when the chuck guardislifted! Pay attention to environmental effects! Use the machine only in dry environments and never in the vicinity of combustible liquids or gases. Make sureyou have good lighting! Wear protective goggles! Wear hearing protection! The sound pressurelevel when working with the machine can exceed 85 dB (A), thereforealways work with hearing protec- tion! Wear suitable working clothes! When working, never wear loose clothing, such as neckties or scarves, as this could get caught in one of the moving parts or the automatically moving workpiece during operation and cause injuries. If you have long hair,wear ahairnet and remove your jewellery. Do not use any damaged or deformed cutting tools. Please make absolutely surethe cutting tools areinperfect condition. Visually check for this intact condition beforeeach use! Keep children and non-participants away from the working area. Make surethat children and non-participants maintain an appropriate safety distance! Youths below the age of 16 may only use the machine under professional instruction and for purposes of schooling. When not in use, keep the machine out of the reach of children! GB-17- Do not overstress your tool. Of course, you will only achieve optimal work results within the performance range for which the machine is designed! There- fore, avoid making the infeed too large! Do not misuse the machine, and do not use it for work for which it is not intended. Always be prudent and attentive! Observe the machine during work and proceed sensibly.Donot use the machine if you aredistracted, tired, or if you have con- sumed alcohol. Handle the connecting cable with care! Protect the connecting cable from heat and sharp edges, and lay the cable so that it cannot be damaged. Do not pull on the cable to disconnect the plug from the socket outlet, and do not lift the device by the cable. Ensurecleanliness: Protect the cable from grease and oil! Clean thoroughly after work! Disconnect the mains plug! Always unplug the mains plug when not in use, beforemainte- nance, when changing tools, cleaning or repairing! Removing the chips is also apart of cleaning! Carefully read the operating instructions beforeuse and keep them in asafe place! Contents Page Foreword16 Safety guidelines 16 Legend 17 Description of the machine 18 Technical data 18 Installation and setting up 18 Operating the handwheels 18 Switching on the automatic feed 19 Working with the tailstock 19 Selecting the turning tool 19 Inserting the cutting tool in the tool post 19 Setting the spindle speeds 20 Calculating the maximum spindle speed 20 Clamping the work piece in the lathe chuck 20 Exchanging the clamping jaws 20 Switching on the machine 20 Longitudinal turning 21 Face turning 21 Taper turning 21 Cutting offawork piece 21 Machining long work pieces with tailstock and centre21 Fitting change gears for thread cutting 22 Thread cutting with the turning tool 22 Thread cutting using the top slide 23 Cutting left threads 23 Accessories for Lathe PD 250/E 23 Installing the centrelathe 23 Removing the centre23 Four -jaw chuck 23 Collet chuck unit and collet chucks 23 Fastening the drill chuck 24 Fixed steady 24 Repair and Maintenance 24 Cleaning

Adjusting the play of the guides 24 Adjusting the play of the handwheels 24 EC Declaration of Conformity 25 Spar eparts list 126 Legend (Fig.1)

7. Clamp screw for sleeve

10. Handwheel for leadscrew

11. Clamp screw for tailstock

17. Adjusting handwheel for cross-slide

18. Clutch switch for automatic feed

19. Drive gearbox cover with speed table

24 Hollow hexagon wrench

Switching on the automatic feed Important Only switch on the feed when the machine is stationary.

Turn the switch 1(Fig. 6) to the right.

2. Turn the switch to the left to switch offthe feed.

stiff, slightly move the handwheel of the leadscrew. Important When the automatic feed is switched on, always ensurethat the support or turning tool do not collide with the lathe chuck or tailstock. Note: When the automatic feed is switched on, the support is pushed by 0.05 or 0.1 mm per turndepending on the gear combination. Please note the sticker on the inside of the drive gearbox when adjusting the feed. The support always moves from right to left when the spindle is turning normally (clockwise rotation) and the automatic feed is switched on. This is also the normal feed when turning. Of course, the support can also be moved back to the output position automatically. To do so, switch offthe machine, slightly draw back the turning tool and then set the switch 2(Fig. 2) to anticlockwise rotation. Working with the tailstock

1. Release the clamp screw 4(Fig. 7), push the tailstock 2on

the guide into the required position and re-tighten the clamp screw. Note: Amount is located on the sleeve for the drill chuck or rotating centrewith morse taper,size MK 1. Important Receiving tapers must always be perfectly clean. Dirt, especially metal chips, affect the precision and can render the sleeve and shank taper unusable.

2. To insert atool, e.g. the centre1(Fig. 7), extend the sleeve

approx. 10 mm by turning the handwheel 3.

3. Firmly push the cone of the lathe center 1(Fig. 7) by hand

into the spindle sleeve. The cone is firmly seated and cannot be pulled out from the front.

4. To release an inserted tool, turnhandwheel 3tothe left to

5. Then turnapprox. one further turnagainst the resistance.

The taper is released and can be removed. Note: The sleeve can be clamped in any position by tightening the screw 5(Fig. 7). Selecting the turning tool Important For proper turning, it is essential that:

• the correct turning tool has been selected for the appropriate purpose

• the blade of the turning tool is sharp

he blade of the turning tool sits exactly in the "centre" posi- tion

• and is operated at the correct speed. Inside turning tools (a) (Fig. 8)

• are used for interior diameter turning. Cut-offtools (b)

• for plunge-cutting grooves and cutting offwork pieces. Thread tools (c)

• are used for cutting outer threads. Finishing or tapering tools (d)

• are used to achieve aclean surface when removing small chips. Right side tools (e)

• isused to cut as many turning chips as possible in the right- hand direction of processing regardless of the quality of the work piece surface (so-called “rough-cutting”). Left side tools (f)

• are used to remove as many chips as possible in ashort time when machining towards the left, regardless of the sur- face quality of the work piece. Insert the cutting tool in the tool post

1. Unscrew both fastening screws 1(Fig. 9) until the selected

turning tool 3fits into the mount. Important Give the turning tool as short an overhang as possible. Allow- ing the tool to project too far leads to vibrations, imprecision and an unclean surface.

height has been correctly adjusted. Note: For height deviations, small metal sheets 2(e.g. valve sensor gauges) must be placed beneath the complete surface. The tool holder provides the possibility of clamping two cutting tools at the same time. This simplifies work, because after adjusting the cutting tools between the individual machining stages for aworkpiece, it is only necessary to swivel the tool holder in order to work with the respectively suitable tool. To do so, simply loosen the Allen screw 5, swivel the tool hold- er and then retighten the screw 5. Of course it is possible to generally regulate the angle of the tool to the workpiece in this manner,ifrequired.-20- Setting the spindle speeds Important Always disconnect the mains plug beforeworking on the drive gearbox. Risk of injury. The spindle speed must be adjusted to suit the work piece material and diameter. Calculating the maximum spindle speed The required spindle speed can be calculated when the speci- fied maximum cutting speed for acertain material is known. Maximum permissible spindle speed Cutting speed x1000

Working piece diameter x3.14 Example: Awork piece with adiameter of 20 mm is to be turned at acut- ting speed of 50 rpm. 50 x1000 20 x3.14 =796/min By shifting the V-belt (Fig. 10), set to the next highest speed. In this case, the speed is 1600 rpm. The correct speed is now set via the controls, and hereisimportant to note that the controls cover aspeed range of 25% to 100%, i.e. in our example, 400 rpm to 1600 rpm.

1. Release the clamp screw from the drive gearbox and open

3. Adjust the relevant speed by shifting the V-belt according to

4. Re-tighten V-belt tensioner.Note the appropriate tension of

the V-belt. Overtensioning increases the wear of the belt and bearing and reduces the motor power.

5. Close the drive gearbox beforecommencing turning work.

Clamping the work piece in the lathe chuck Important If work pieces areclamped in the lathe chuck using the tail- stock without asteady,the projection (Fig. 12) must not be greater than three times the diameter of the material (L =3xD). Note: The normal lathe chuck has three steel jaws, which areuni- formly adjusted and centreround work pieces automatically. In the normal position, work pieces can be clamped up to a diameter of 35 mm. After turning the jaws, it is possible to clamp up to adiameter of 68 mm.

1. Turn the lathe chuck 2(Fig. 12) using the wrench 1until the

work piece fits in the mount. Important Do not leave the wrench in the lathe chuck. Risk of injury.

2. Clamp the work piece tightly and remove the wrench from

3. Check the running of the work piece and correct if neces-

sary. Important Clamping alonger work piece which has been guided through the spindle and is projecting to the left increases the risk of injury .Inthis case, be particularly careful to ensurethat no objects arecaught in the rotating shaft. Protect this zone sep- arately by fuse. Exchanging the clamping jaws (Fig. 13) Important Remove mains plug. Important Do not clamp work pieces with adiameter greater than 68 mm. The clamping force of the jaws is then too small and the work piece may become loose. Danger of accident. In order to clamp work pieces externally (e.g. for clamping solid steel bars with greater diameters, the included outside jaws must be inserted into the chuck instead of the factory-mounted inside jaws. To reverse or exchange the jaws, please proceed as follows:

1. Disconnect the mains plug to prevent the machine from

starting up unintentionally.

2. Use the chuck key to screw out the jaws as far as possible

so that they can be removed from the chuck.

3. Reverse or exchange the jaws and reinsert. During the pro-

cedure, please pay attention to the identification: Numbers (1, 2, 3) have been imprinted on the jaws!

4. Screw down the chuck with the chuck key and check the

centricity of the jaws. If required, correct the position of the jaws by reinserting in the chuck body so that the jaws grip the spiral in the correct position.

5. If you want to work with the inside jaw chuck again, repeat

the steps described above in the reverse order,i.e. first insert jaw nos. 1and 2, and then 3. Switching on the machine Important Beforeswitching on the machine, ensurethat the jaw chuck wrench is not in the chuck, the jaws arenot protruding and that thereisno-one in the danger zone. Activation of the machine while clamping pins areinthe chuck holes can fling these out or lead to jamming during starting.

Danger: Serious injuries or material damage may result as a

consequence of this! Only switch on the machine when the part to be turned is clamped in the chuck, as otherwise the jaws could become loose and cause injury. Caution: Always work within the intended performance range! Avoid spindle blockages caused by overloading. In the event of the-21- spindle blocking during operation, please switch offthe machine immediately and configurethe feed and infeed for fur- ther machining to avoid overloading of the machine. Caution! Beforeinserting the mains plug, please check if the information on the rating plate matches the local conditions of your mains supply .Ifthey do not match, then damage or hazards during work could be result! Caution! Always wear hearing protection and protective goggles while working! Caution!

oid abnormal body posture! Make sureyou stand securely and can keep your balance. Caution! Please comply with the following when commissioning and working with the PD 250/E: Your machine is equipped with an automatic safety shutdown and can only be operated when the chuck guardisfolded down! As soon as the chuck guardis folded up during operation, the motor will shut offautomatical- ly! Only work with afolded down chuck guard! If the guardis defective, the machine may no longer be operated! Avoid unnatural body positions. Ensurethat you arestanding in asafe position and keep your balance.

1. Set selection switch 2(Fig. 2) to "0" position.

3. Turn the selection switch 2tothe right for normal turning.

4. Turn the selection switch to the left for anti-clockwise

rotation. Important Only switch on when the machine is stationary.

5. When you have finished working, switch offthe machine

again using the main switch. Only then is the machine com- pletely disconnected from the mains. Longitudinal turning Note: Turning parallel to the rotational axis and machining cylindrical objects arethe main uses of alathe.

1. Select the spindle speed according to the table on your

2. Adjust the required speed by shifting the belt in the drive

gearbox (see previous section).

3. Clamp aright side tool 2(Fig. 14) in the tool holder (see pre-

5. Move the support from the right to the left of the work piece.

6. Adjust the cutting depth using the cross-slide 1.

Important Beforeswitching on the machine, manually check whether the spindle, chuck and work piece arerunning free. Do not allow the support or turning tool to collide with the lathe chuck.

Switch on the machine (clockwise rotation).

8. Manually feed or switch on the automatic feed 3, do not

overload the machine. Note: If the top slide is not necessary,itisadvisable to clamp it with the screw 4(Fig. 14). The turning performance is improved by eliminating play. Face turning Note: This method of working is used to turnoff the face of awork piece.

1. Adjust the right side tool by approx. 2° to 3° (Fig. 15).

2. Move the cross-slide from outside inwards (to the centre)

with the turning tool. Important The cutting speed from outside inwards differs considerably for work pieces with larger diameters. Therefore, push the cross-slide slowly and sensitively. Taper turning The top slide (Fig. 16) is equipped with ascale and can be swiv- elled by 45° on either side of zerofor taper turning. To do so, release fastening screw 1, adjust top slide and then re-tighten. Cutting offawork piece

1. Clamp the cut-offtool at right angles in the tool holder.

Important Give the cut-offtool as short an overhang as possible (half of the diameter of the work piece +1mm). Similarly,give the work piece as short an overhang as possible. Note the exact centreheight of the cut-offtool. Work at low speeds and cool blade as often as possible.

2. Sensitively move the cross-slide from outside inwards (to

the centre) with the turning tool. Machining longer work pieces with tail- stock and centre Important If the chuck projection is greater than three times the diame- ter of the work piece, the work piece must be held at the right end by the tailstock and centre. For this purpose, acentreboremust be drilled on the right side of the work piece.

1. Face turnthe right face.

2. Insert the drill chuck (accessories) in the tailstock and

clamp the centring drill.-22-

3. Move the tailstock with drill chuck and centring drill up to

the face of the work piece.

Switch on the machine and drill centreboreusing the sleeve feed.

Replace the drill chuck with the rotating centre1(Fig. 17).

7. Advance the sleeve 2until all play is eliminated.

8. Securethe sleeve using aset screw 4.

Fitting change gears for thread cutting Note: The PROXXON Lathe PD 250/E can be used to cut metric threads with apitch of: 0.5 (M3), 0.625, 0.7 (M4), 0.75,

0.8 (M5), 1.0 (M6), 1.25 (M8), and 1.5 (M10).

The PD 250/E is supplied with installed gear arm and the change gear combination for the automatic feed of 0.05 mm/revolution. It is only necessary to replace the change gears installed on the gear arm for thread cutting.

1. Release the clamp screw 1(Fig. 18) and tilt the gear arm 2

slightly upwards to remove the toothed belt 4.

2. Remove the fastening screws 3and 5fromthe normal gears

for the automatic feed. Note: The number of teeth is imprinted on all change gears. For example, if cutting athread with apitch of 1.0 mm, the table on the drive gearbox will show the following data: W15-gear on the main spindle with 15 teeth. This gear is already installed on the shaft and must not be replaced.

20 -Intermediate gear for the toothed belt of the main spindle with 15 teeth and permanently linked gear for the leadscrew with 20 teeth. L20 -leadscrew gear with 20 teeth.

Fasten the change gear "Z

ith 15/20 teeth (Fig. 19) to the gear arm 3using the screw 2, pulley,reduction sleeve and nut. Note: Do not yet tighten the fastening screw nut 2(off-centreadjust- ment must still be possible). The change gear "Z

"runs freely between pulley and sleeve. The washer prevents the toothed belt from becoming detached from the gear "Z

Release the set screw 1, remove the change gear "L40" and replace with the change gear "L20". Note: The grain of the leadscrew change "L" must always point to the lathe chuck. The set screw 1must be clamped onto the flattened part of the shaft. Important To ensurethat thereissufficient play between the change gears, always insert astrip of newspaper between the teeth when pushing the change gears together.The thickness of the newspaper should correspond to the required tooth play.

5. Push the axle of the change gear "Z

"onto the arm so that it contacts the leadscrew gear "L" and then tighten the fastening screw nut 2.

6. Position the short toothed belt for the connection between

the gears "W" and "Z

7. Push the gear arm 3downwards and tighten the clamp

screw 4. Thread cutting with the turning tool Note: For the following operations, the work piece must be machined completely and have the correct thread outer diameter. It is advisable to work out achamfer at the beginning of the thread. The thread turning tool must be clamped at an angle of 90° exactly.

1. Clamp the work piece.

2. Switch offthe automatic feed and set the turning tool to the

starting position. Important Use the lowest speed when cutting threads and proceed with utmost caution.

3. Press button 2(Fig. 20) to switch on the machine (clockwise

5. Switch offthe machine when the required thread length has

been reached 2.-23- Important The automatic feed must remain switched on until completion of the thread. Disengaging between individual steps renders further work impossible. Only switch over the motor switch once the lathe chuck has come to acomplete standstill. Switching over immediately increases wear and reduces the service life of the motor.

6. Move back the turning tool slightly with the cross-slide.

7. Move the support back to the output position. To do so,

switch over the turning direction of the main spindle.

8. Advance the turning tool and repeat the steps described

above until the required thread depth is reached. Thread cutting using the top slide Aperfect, good-quality thread can only be cut by using the top slide. Advancing the thread tool is performed using the cross-slide as described above. However,this causes the top slide to shift by 0.025 mm to the left and the same distance to the right. The chip in the thread is thereforealways only removed from one side. Once the full thread depth has been reached, afinal full cut is made by advancing slightly. Cutting left threads To cut left threads, the intermediate gear 1(Fig. 21) must be installed between "Z

"and the leadscrew gear "L1". In doing so, the turning direction of the leadscrew is reversed. The support runs from right to left when the chuck is turning clockwise. Installation and operation areasdescribed above. Accessories for Lathe PD 250/E Note: The following accessories arenot included in the standard equipment. Installing the centrelathe (No. 24014) Note: Longer work pieces areclamped between the brad points of the main spindle and tailstock. The work piece must have acentreboreonboth faces. An exact cylindrical work piece is only achieved if the points align in the horizontal position.

1. Remove three fastening screws from the three-jaw chuck

2. Thoroughly clean the fit for the driving disc and centreand

its fit in the main spindle.

3. Insert the centre4(Fig. 22) in the fit 1ofthe main spindle.

4. Fit the driving disc 2and fasten with three screws 3.

On the left side, insert driving pin in one of the three long holes on the driving disc and the centreinthe centrebore.

6. Push the lathe carrier 1(Fig. 23) onto the work piece (driving

pin outwards) and tighten the fastening screw 2.

On the right side, attach the work piece using the tailstock and fixed or rotating centre. Important When using acentrefixed to the tailstock, regular lubrication of the centreand centreboreisnecessary to prevent the tem- per from loosening. Removing the centre

8. Guide asuitable aluminium or brass rodthrough the main

spindle from left to right.

9. Hold the centreand release by lightly tapping the rod.

Four-jaw chuck (No. 24036) Note: Round, oval, squareand irregularly shaped work pieces can be clamped as it is possible to adjust the jaws individually. Centric or eccentric clamping is possible. Unlike the three-jaw chuck, centring of the work piece must be performed manually. Important Remove mains plug.

1. Detach the three-jaw chuck and attach the four-jaw chuck.

2. Open the four jaws, clean the contact faces and clamp the

work piece lightly according to visual estimation.

3. Move the support and turning tool onto the plane surface of

4. Turn the chuck by hand to establish symmetrical deviations.

5. Adjust by opening one of the jaws and re-set the opposite

6. Tighten all four jaws evenly,alternating crosswise.

Important In the normal clamping jaw position, only work pieces with an edge of up to max. 30 mm long can be clamped. The maximum length is 80 mm in the reverse position. Larger work pieces arenot securely held. Danger of accident. Collet chuck unit and collet chucks (No. 24038) Note: The collet chuck unit is especially suitable for processing round parts with great precision. The truth of running is-24- considerably greater than when working with ajaw chuck. Important Remove mains plug.

1. Remove three fastening screws from the three-jaw chuck

2. Thoroughly clean the fit for the collet chuck mount 2

(Fig. 24) and the fit in the main spindle 1.

Attach the collet chuck mount 2using four fastening screws 3. Important Always use the correct collet chuck to suit the work piece. Chucks with an oversized diameter aredestroyed.

Insert the collet chuck 6and loosely screw in the union nut 5. Important Never tighten the union nut when thereisnowork piece inserted.

5. Insert the appropriate work piece in the collet chuck and

tighten the union nut 5using the tool pins 4. Fasteningthe drill chuck (No. 24020)

1. Remove the rotating centrefromthe sleeve. Thoroughly

clean the grease and dirt from the shank taper and chuck bore.

2. Insert the journal in the sleeve and firmly push onto the drill

chuck. Note: Releasing the drill chuck is performed in the same way as the rotating centre. Fixed steady (No. 24010) The steady is particularly suitable for hollowing out long work pieces with diameters up to 40 mm.

1. Release the fastening screw 4(Fig. 25) and position retain-

ing plate 3crosswise.

2. Place the steady on the bed guide and set to the required

3. Swivel the retaining plate 3parallel to the steady base and

tighten fastening screw 4.

4. Release all clamp screws 1and drive the individual retain-

ing jaws 2onto the work piece Important The jaws 2must only touch the work piece and must not jam. Otherwise thereisarisk of the work piece surface becoming scratched and the motor becoming overloaded. If the work piece is not round and smooth at the support point, it must first be turned round. Lubricate the jaws and work piece regularly when turning.

5. Check that the work piece is positioned in the steady free of

play and re-tighten clamp screws 1. Repair and Maintenance Cleaning Caution! Always disconnect the mains plug for all adjustment and main- tenance work! Risk of serious injuries or damage due to inad- vertent starting up of the device, or hazarddue to electric shock!

1. After use, thoroughly clean all chips from the machine using

abrush or handbrush. Do not use compressed air for clean- ing.

2. Regularly lubricate or oil all moving parts, spindles and

guides! The outside of the housing can be cleaned with asoft, dry or damp cloth. It is possible to use mild soap or other suitable cleaning agent here. Solvents or cleaning agents containing alcohol (e.g. petrol, cleaning alcohol etc.) should be avoided, since these can attack the plastic housing casings as well as wash offthe lubricants. Please observe: Changing the power supply cordmay only be carried out by our Proxxon-Service-Department or aqualified specialist! Adjusting the play of the guides (Fig. 27) Note: Even if the guides areregularly lubricated or oiled, it is unavoid- able that the guides will exhibit play after some time due to wear. The proceduredescribed hereusing the example of the upper carriage is the same for all guides, thereforeitapplies analo- gously to the other guides on your lathe. For that reason they will not be treated separately here. Adjust the guides according to the motto: As "tightly" as necessary,aseasy running as pos- sible! Please consider: If guides areset too closely,this causes high- er operating forces as well as increased wear!

1. Release and slightly unscrew the counter nuts 1ofthe

adjusting screws 2for the upper carriage 3using an open- end spanner 5.

2. Evenly turninthe adjusting screws 2with an Allen key 4

until the play is eliminated.

3. Retighten the counter nuts 1. In the process, hold the

adjusting screws 2inposition with the fixed spanner 5so that they do not misadjust again.

4. Turn over the machine and slightly unscrew the set screw 2

5. Then check if the support can still be moved easily and if

it runs completely without play. Adjusting the play of the handwheels (Fig. 29): Just as for the guides, handwheel wear during operation can- not be avoided which ensures that the backlash increases slowly but consistently.Tominimise this again, please proceed as follows:-25-

1. Hold on to the handwheel 1and release the cap nut 2.

Turn the handwheel slightly to the right.

3. Retighten the cap nut while still holding the handwheel.

Please consider hereaswell: The complete elimination of the backlash and atoo "tight" adjustment for the handwheels is unreasonable: If the hand- wheels areset too closely,this causes higher operating forces as well as increased wear hereaswell! Disposal: Please do not dispose of the device in domestic waste! The device contains valuable substances that can be recycled. If you have any questions about this, please contact your local waste management enterprise or other corresponding munici- pal facilities. EC Declaration of Conformity Name and address: PROXXON S.A. 6-10, Härebierg L-6868 Wecker Product designation: PD 250/E Article No.: 24002

sole responsibility,wedeclarethat this product conforms to the following directives and normative documents: EU EMC Directive 2014/30/EC

EU Machinery Directive 2006/42/EC

24002-01-23 LED /LED

properuse, such as capacity overload, damage due to outside influences and normal wear are excluded from the warranty.