Duerkopp Adler 558 Service Instructions Manual
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Duerkopp Adler 558 Service Instructions Manual

Duerkopp Adler 558 Service Instructions Manual

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Contents
Preface and General Safety Notes
Part 3: Service Instructions Cl. 558
1.
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Handwheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Turn-off Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Brake Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
Auxiliary Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Coupling Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
High-speed Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
Turn-on Link with Idle lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.
Setting Lever for Stitches in the Eye . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.
Brake Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.
Brake Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11.
Cloth Clamp height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.
Cloth Camp Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.
Pressure point of the Clamp operating lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14.
15.
Position of the Clamp Closing Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16.
17.
Changeover Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18.
Squaring of the Hook Block to the Material Support Plate . . . . . . . . . . . . . . . . . . . . .
19.
Material Support Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20.
21.
Clamping Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21.1
Setting Parallel to the Material Support Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21.2
Setting the Stopper Pieces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21.3
Setting the Securing Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22.
Neutral Needle Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23.
24.
25.
Anvil Body and Cutter Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26.
Torque Limiter and Ratchet Wheel on the High-speed Wheel . . . . . . . . . . . . . . . . . . .
27.
Needle Bar Drive Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28.
Hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28.1
28.2
Looping Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28.3
Needle Bar Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28.4
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  • Page 1: Table Of Contents

    Home Contents Page: Preface and General Safety Notes Part 3: Service Instructions Cl. 558 General ..........Handwheel .
  • Page 2 Spreader ..........Needle Plate .

  • Page 3: General

    1. General These Service Instructions 558 describe in a practical order the settings for the sewing machine. ATTENTION The tasks described in the service instructions may only be conducted by specialists or suitably trained personnel ! Since various setting positions are interdependent it is essential that the settings be made keeping to the order described.

  • Page 4: Handwheel

    2. Handwheel The freeing of the drive pulley 6 when turning off the machine is done by disengaging the handwheel 1. The timing for the disengagement is determined by the switch surface The turn-off link 5 with the roller 4 lies onto the handwheel. When reaching the switch surface it releases and the disengaging roller 2 falls in to disengage the handwheel.
  • Page 5 – Loosen and remove lock nuts 12. Attention Pressure spring ! – Loosen screws 10. – Swing the coupling lever 13 to the back. – Pull off handwheel 1. – Place the handwheel on the multi-key profile of the arm shaft as described.

  • Page 6: Turn-Off Lever

    3. Turn-off Lever The turn-off lever 1 is set with the gauge (Order no. 558 1635). Caution Risk of Injury ! Pull the mains plug before setting. – Loosen screw 11. – Set stop 9 as far forward as possible. –...

  • Page 7: Brake Lever

    4. Brake Lever Through the brake lever 11 the handwheel is arrested in the end position of the machine (needle high position). For this the leaf spring assembly 5 falls into the groove of the brake cam 2. The brake lever is set with the gauges (Order no. 558 1636 for 1 mm and 558 1634 for 0.3 mm).

  • Page 8: Auxiliary Brake

    4.1 Auxiliary Brake The auxiliary brake supplements the brake lever with the spring assembly for braking. A greater serviceable life of the spring assembly is thus achieved. Caution Risk of Injury ! Pull the mains plug before setting. – Bring the machine in the end position. –...

  • Page 9: Coupling Lever

    5. Coupling Lever The coupling lever is set with the gauge (Order no. 558 1634). Caution Risk of Injury ! Pull the mains plug before setting. – Arrest the three-armed lever 13 as described in chapter 3. – Swing the coupling lever 8 with its roller 6 up to a distance of 0.3 mm from the handwheel 3.

  • Page 10: High-Speed Wheel

    6. High-speed Wheel After turning the handwheel into the turn-off position (needle high position) the catches 8 of the high-speed wheel grip in the catches 3 of the feeding shaft. The changeover from sewing to quick transport is established. The setting of the correct clearance between the catches is made with the gauge (Order no.

  • Page 11: Turn-On Link With Idle Lever

    7. Turn-on Link with Idle Lever For sure starting of the sewing drive the groove in the idle lever 4 must freely enclose the pin of the roller screw. When running into the turn-off position the turn-on link 1 is pressed so far back by the stop 3 that the idle lever can fall in.

  • Page 12: Setting Lever For Stitches In The Eye

    8. Setting Lever for Stitches in the Eye The stitches in the eye of the buttonhole can be set denser by pulling forward the stitch length regulating rail 5. In the area of the eyes the roller 7 drops in the curved path 9 or the roller 7 is raised by the curved path 9.

  • Page 13: Brake Strap

    9. Brake Strap The brake strap lies as a semi-circle around the main control disc in the forward part of the housing. The main control disc should only be braked so much that the needle positions in both seam rows appear uniform. A brake strap set too loose can cause noises in the buttonhole machine.

  • Page 14: Brake Clamp

    10. Brake Clamp The brake clamp 2 brakes the feeding shaft 1. The braking should thereby be only so strong that during running of the machine the transport the material support plate occurs absolutely uniform. The setting of the braking force occurs through turning the pressure screw 3.

  • Page 15: Cloth Clamp Height

    11. Cloth Clamp Height The clearance between the upper cloth clamps 2 and the lower cloth clamps 3 should be 10 mm. The clearance is set with the gauge 3 (Order no. 558 1633) eingestellt. Caution Risk of Injury ! Pull the mains plug before setting.

  • Page 16: Cloth Camp Pressure

    12. Cloth Clamp Pressure Through the spring-mounted clamp frame 2 found under the material support plate the pressure of the upper cloth clamps is automatically adjusted to the material thickness. The pressure of its compensation springs 4 is set at the factory. Normally it should not be altered.

  • Page 17: Pressure Point Of The Clamp Operating Lever

    13. Pressure Point of the Clamp Operating Lever In order to prevent a jumping up of the upper cloth clamps during sewing the clamp operating lever 1 must be set a little beyond its strongest pressure point. Exceeding the pressure point too much can result in: –...

  • Page 18: Pressure Of The Clamp Closing Lever

    14. Pressure of the Clamp Closing Lever When starting the sewing procedure the upper cloth clamps are automatically closed by the movement of the clamp closing lever 3. The clamp operating lever 2 must thereby be moved with certainty in front of the stop screw 4.

  • Page 19: Position Of The Clamp Closing Lever

    15. Position of the Clamp Closing Lever On the clamp closing lever 1 are to be found the closer 5 for automatic closing and the tappet 6 for automatic opening of the clamping plates. Depending on the execution of the Sewing machine for a) cutting after sewing b) vor and cutting after sewing different settings of the clamp closing lever become necessary.
  • Page 20 b) Cutting before and after sewing By sewing machines laid out for cutting before and after sewing two cams on the main control disc control the movement of the clamp closing lever. The first cam in the direction of turn conducts the closing movement for cutting before sewing and the second cam for cutting after sewing.

  • Page 21: Machine End Positions

    16. Machine End Positions The turning off in each of the end position occurs via the turn-off bolt 11 which is released by the reversing lever 8 of the high-speed wheel. The timing for release of the high-speed wheel is determined by the settings cutting before or after sewing.
  • Page 22 b) Cutting after sewing The turn-off bolt 11 should release the high-speed wheel via the reversing lever 8 when the cutting procedure is ended, this means, when the cutter bar is in its highest position. The clamp closing lever 7 must be set to "...

  • Page 23: Changeover Protection

    17. Changeover Protection The changeover protection prevents the switching of the machine from sewing to quick transport before the needle is in the high position. Damage to the needle and material are thus avoided. Caution Risk of Injury ! Pull the mains plug before setting. –...

  • Page 24: Squaring Of The Hook Block To The Material Support Plate

    18. Squaring of the Hook Block to the Material Support Plate The hook block must, during sewing of both buttonhole rows, thus also after it turns in the buttonhole eye by 180°, lit at a right angle to edge 1 of the material support plate. The measurement is made with an angle.

  • Page 25: Material Support Plate

    19. Material Support Plate The clearances X1 and X2 between the edges of the material support plate and the hook block must be equal. Caution Risk of Injury ! Pull the mains plug before setting. – Turn the machine out of the end position. The roller bolt should not be on the cam 1.

  • Page 26: Upper Toothed Quadrant

    20. Upper Toothed Quadrant Previous to the setting of the upper toothed quadrant 3 the settings per chapters 17, 18 and 19 must be checked and made corrected. The pendulum movement of the needle bar should occur precisely at a right angle to the material support plate.

  • Page 27: Clamping Plates

    21. Clamping Plates 21.1 Setting Parallel to the Material Support Plate The clamping plates should lie parallel to the edge 2 and 7 of the material support plate. Caution Risk of Injury ! Pull the mains plug before setting. – Place the right clamping plate on the material support plate.

  • Page 28: Setting The Securing Blocks

    21.3 Setting the Securing Blocks The securing blocks 2 prevent a sliding of the clamping plates out of their spread positions during the cutting and sewing procedures. Caution Risk of Injury ! Pull the mains plug before setting. – With closed and spread clamping plates loosen screws 1. –...

  • Page 29: Neutral Needle Position

    22. Neutral Needle Position The neutral needle position lies to the left, that is, the swing of the needle bar is one-sided. During sewing of the right buttonhole seam it is conducted from left to right. When changing over from the smallest to the greazest buttonhole width only the position of the stitches lying to the outside may change.

  • Page 30: Cutting Room Between The Two Seam Rows

    23. Cutting Room Between the Two Seam Rows By machines that cut before sewing the interior stitches must be precisely congruent (see illus. b). By machines that cut after sewing there must be a small cutting room between the two seam rows for the knife cut (see illus.a). The cutting room required for different materials can be found in the Device Summary Table in chapter 1.4 of the Operating Instructions.

  • Page 31: Symmetrical Eye Form And Uniform Length Of The Buttonhole Seam

    24. Symmetrical Eye Form and Uniform Length of the Buttonhole Seam Both seam rows should be of equal length and the buttonhole eye should appear circular. Caution Risk of Injury ! Pull the mains plug before setting. When both seam rows are not equally long the ball-headed screw 2 must be adjusted accordingly.

  • Page 32: Anvil Body And Cutter Bar

    25. Anvil Body and Cutter Bar The cutting knife 1, by machines for cutting after sewing, should cut precisely between the inner seam rows and in the middle of the eye (see illus. a). Attach the control disc for large eyes ! By machines for cutting before sewing the cutting knife should cut precisely on the congruent inner stitches and around the eye (see illus.
  • Page 33 – Position the clamping plates. – Turn on the main switch. Caution Risk of Injury ! Do not reach into the area of the cutting knife with the machine turned. – Punch the seam pattern into thin cardboard with a short needle. –...
  • Page 34 Cutter bar Before setting the cutter bar the anvil body must be aligned. The knife impression should be at the center of the cutting block. The cutter bar must move easily up and down but without any play. Caution Risk of Injury ! Pull the mains plug before setting.

  • Page 35: Torque Limiter And Ratchet Wheel On The High-Speed Wheel

    26. Torque Limiter and Ratchet Wheel on the High-speed Wheel On the feeding shaft thereis a torque limiter. It serves is avoid breakage through possibly jamming machine parts (e.g. of the cutter bar if the cutting pressure is set too high). The ratchet wheel 5 does not have a rigid connection to the high-speed wheel 3.

  • Page 36: Needle Bar Drive Wheels

    27. Needle Bar Drive Wheels The play between the needle bar drive wheels 2 and 4 may not be set too small but also not too high. Too little play leads to too much noise developing in the sprockets. Too much play leads to rattling of the needle bar. So that the exact movement sequence is retained the two sprockets are equipped with a center mark.

  • Page 37: Hook

    28. Hook 28.1 Hook Height Before setting the looping stroke and the needle bar height and particularly after needle breakage the correct hook height must be checked. For checking the hook height use the gauge (Order no. 557 604). Caution Risk of Injury ! Pull the mains plug before setting.

  • Page 38: Looping Stroke

    28.2 Looping Stroke With looping stroke is meant the path that the needle bar travels from its lowest position to that point where the left or right hook tip lies at the center of the needle. The setting of the looping stroke must be made with the maximum buttonhole width set.
  • Page 39 – For precise setting first loosen the screw 2 accessable behind the hook block. Screw 2 is accessable through hole 1 in the base position of the hook block. – By adjusting the clamping piece 3 set the hook support so that the right and left hook tip have the same clearance to the needle.

  • Page 40: Needle Bar Height

    28.3 Needle Bar Height The needle bar height is 2.5 mm. When the needle bar has risen in the amount of the needle bar height plus the looping stroke out of its lower dead center, then 3/4 of the needle eye should be visible under the lower edge of the left hook. See Illus.: a .

  • Page 41: Hook Clearance And Needle Guard

    28.4 Hook Clearance and Needle Guard The hook tips should have a clearance of 0.1 mm to the needle. The hook clearance to the needle remain constant during the whole turning movement of the hook block. If this is not the case the needle bar rotation center must be corrected (see chapter 35).

  • Page 42: Spreader

    29. Spreader Between the fork spreader 5 and the left hook there must be a clearance appropriate to the thickness of the underthread used. The right spreader 1 should move as close as possible without touching on the top of the right hook. Caution Risk of Injury ! Pull the mains plug before setting.

  • Page 43: Needle Plate

    30. Needle Plate The penetration of the needle into the needle hole of the needle plate should occur one-sided on edge 2. The clearance the needle to edge 2 should be 0,1 to 0.2 mm. The needle plate must be set as high as possible. This avoids the material being pressed too far down during stitching of the needle.

  • Page 44: Tension Release

    31. Tension Release The upper thread tension is executed as a dual tension. It consists of the main tension 8 and the remaining tension 3. The remaining tension 3 serves for tautening of the upper thread for the cutting procedure under the needle plate. It is not opened after the seam end.
  • Page 45 – Turn the machine with the hand crank until just before the seam end. Turn farther until the upper thread knife begins with the cutting movement to the right. – Loosen nut 6. – Set turn-off lever 8 so that the roller center is exactly under the tip 7 of the curve plate 4.

  • Page 46: Upper Thread Puller

    32. Upper Thread Puller The upper thread puller 7 makes available an always uniformly long beginning thread for the secure stitch formation at the seam beginning. So that the pulled-forward upper thread is not pulled back out of the upper thread tension, the thread gripper 1 only releases it shortly before sewing begin.
  • Page 47 – With inserted cutting block and cutting knife turn the cutter bar into its lowest position with the hand crank. – Loosen screws 2. – Pull the upper thread puller into its lowest position by sliding the rod 1. – Tighten screws 2 again.

  • Page 48: Removing Of The Machine Arm

    33. Removing of the Machine Arm The removal of the machine arm becomes necessary when there is a blockage of the sewing machine. This can be caused by a foreign object (e.g. the remainder of a needle), which has caught in the main control disc. Caution Risk of Injury ! Before removing or replacing the machine arm pull the mains plug.
  • Page 49 – Remove the 3 arm mounting screws 2 and 3 as well as screw 9 lying under the protective plate 8. – Loosen screw 6 and remove setting pin 1. – Remove the centering screw 10. – Loosen screw 11 and remove the length setting slide 5. –...

  • Page 50: Replacing Of The Machine Arm

    34. Replacing of the Machine Arm To reattach the machine arm work in the reverse order as described in the chapter Removing of the Machine Arm. Caution Risk of Injury ! Before replacement of the machine arm pull the mains plug. The following points are to be taken into account when replacing the machine arm ! –...

  • Page 51: Needle Bar Rotation Center

    35. Needle Bar Rotation Center The machine arm is aligned at the factory so that the needle bar rotation center and hook block rotation center lie over each other. This position is secured by the centering screw 1 and the setting pin 3. The needle bar rotation center is correctly aligned when the clearance between needle and hook tip always remains constant during the needle bar and hook block rotation (see illus.

  • Page 52: Upper Thread Trimmer

    36. Upper Thread Trimmer 36.1 Control Lever The control lever 3 is in the machine housing. Via the feed rod 1 it operates the upper thread trimmer. Caution Risk of Injury ! Pull the mains plug before checking and adjusting. The setting of the control lever 3 to the main control disc is fixed by the stop screw 2.

  • Page 53: Upper Thread Knife

    36.2 Upper Thread Knife At the seam end (sewing drive disengaged) the cutting movement of the upper thread knife occurs via the feed rod 2. Caution Risk of Injury ! Pull the mains plug before adjusting. Clearance The Clearance between the tip of the upper thread knife 1 and the needle lying at the right in its lowest position must be about 0.2 mm.
  • Page 54 Sideways alignment After the hook carrier 4 has moved into its extreme left position (machine end position) the spreader stop 3 may not hit the knife holder 2 lying in its right end position. – Loosen the lock nut and move the knife holder 2 to the right toward the spreader stop 3 by turning the setting screw 5 .

  • Page 55: Feed Rod

    36.3 Feed Rod When the lever 3 lies under the feed rod 1 in its rest position (upper position) the clearance between the two must be 1 mm. Caution Risk of Injury ! Pull the mains plug before adjusting. – Turn the hand crank until the hook block has turned by about 90 °.

  • Page 56: Operating Latch

    36.4 Operating Latch At the last stitch of the buttonhole seam the handwheel locks. In this position there must be a feelable clearance X between latch 6 and the operating piece 1. By slow continued turning of the hand crank the operating piece 1 with the operating edge 3 wanders onto the latch tip 5.
  • Page 57 – Loosen the lock nut and set the clearance between the edge of the latch 2 and the pin 3 with the setting screw 4. The clearance must be 3 mm. – Press lever 8 up until touching. – Slowly turn the hand crank farther until the operating edge 1 is exactly at the latch tip.

  • Page 58: Underthread Gripper By Sub-Class - 211000 And - 241000

    37. Underthread Gripper by Sub-class - 211000 and - 241000 After the sewing sequence is completed latch 4, through the movement of the material support plate, runs onto the operating edge 10 of the operating piece 6. The feed rod 1 lowers itself onto lever 8. The upper thread knife 3 connected to the underthread gripper 2 conducts the cutting movement.
  • Page 59 Right end position – Loosen lock nut 15. – Set screw 14. In the right end position edge 4 of the underthread gripper should have moved about 1 mm beyond the edge 2 of the exit on the thread slit. –...

  • Page 60: Underthread Puller By Sub-Classes - 211000 And - 241000

    38. Underthread Puller by Sub-classes - 211000 and - 241000 The movement of the underthread puller 3 occurs simultaneously with the cutting movement of the upper thread knife. The amount of underthread pulled forward assures a secure seam beginning. It prevents the premature pulling out of the otherwise tensioned underthread out of the underthread gripper.

  • Page 61: Short Trimmer For Underthread And Gimps By Sub-Class - 241000

    39. Short trimmer for Underthread and Gimp by Sub-class - 241000 Just before the machine end position the hook block turns. The driver 8 mounted thereon operates the scissors knives 1 and 2 through lever 6. The blades of the two scissors must have moved about 1 mm above each other in front of their reversing point.

  • Page 62: Gimp Pulling Device By Sub-Class - 241000

    40. Gimp Pulling Device by Sub-class - 241000 The drop weight 5 with the adjustable brake flap 3 pulls the lower gimp back to the correct starting length before sewing begins. The path of the drop weight 5 is limited by the stop screw 7. It must be set so that the gimp is as short as possible but still be able to be sewn in securely at the beginning of sewing.
  • Page 63 – Set the stop screw 1. The gimp end should, after cutting, still extend about 4 mm out of the gimp hole in the needle plate. Screw screw 1 in = shorter gimp end Screw screw 1 out = longer gimp end ATTENTION ! The path of the drop weight must also be reset when changing the buttonhole length or the clamping plates (change of the cutting length...

  • Page 64: Mechanical Upper Thread Catcher By Sub-Classes - 211000 And - 241000

    41. Mechanical Upper Thread Catcher by Sub-classes - 211000 and - 241000 The upper thread catcher 4 lowers and rises with the movement of the cutter bar 3. During lowering the hook 6 must move about 3 mm forward beyond the upper thread.

  • Page 65: Long Trimmer For Underthread And Gimps By Sub-Class - 221000

    42. Long Trimmer for Underthread and Gimp by Sub-class -221000 Lever 4 for the underthread and gimp trimmer is operated by the knife drive curve 1. The blades 2 and 3 must move 1 mm above each other. Roller 5 determines the swing of lever 4 through its position to the knife drive curve 1.
  • Page 66 Caution Risk of Injury ! Pull the mains plug before adjusting. – Bring the machine into the end position. – Remove the clamping plates. – Loosen the mounting screws 2 for the thread gripper. – Set a clearance of 49 mm between the left edge 1 of the clamping plate and the right edge 3 of the thread gripper.

  • Page 67: Cutting Pressure And Cutting Movement Of The Underthread And Gimp Trimmer

    42.2 Cutting Rressure and Cutting Movement of the Underthread and Gimp Trimmer The cutting pressure may only be set as strong as is necessary for a sure cutting of the threads. At the reversing point the blade of the fixed knife 5 must lie about 1 to 2 mm over the blade of the movable knife 4.
  • Page 68 – Loosen screw 1. – Set the operating lever 2. Set a clearance of 53.5 mm between edge 5 of the clamping plate and the outside of the roller 4. Turn the operating lever 2 appropriately. – Tighten screw 1 again. –...
  • Page 69 – By turning the hand crank bring the movable knife 2 back into the left end position. – Loosen screws 6. – Set the fixed knife 5 with its blade 1 to 2 mm above the blade of the movable knife 2. –...

  • Page 70: Thread Seperator For Underthread And Gimp

    42.3 Thread Seperator for Underthread and Gimp The tip of the thread seperator 6 must insert itself between the underthread 2 and the gimp 1. For this both threads must be taut. For the gimp this is achieved through a torque rod on the hook block. Thin and smooth gimps may have to be threaded through 3 holes on the unwinding arm of the yarn stand.

  • Page 71: Thread Gripper And Thread Deflector

    42.4 Thread Gripper and Thread Deflector The force of the clamping spring 6 is, dependent on the thickness of the underthread used, to be set so that the thread can be pulled under it without hindrance. The underthread must, however, be held so tight that a secure and drawn tight seam beginning is achieved.

  • Page 72: Underthread Puller For The Cutting Procedure

    42.5 Underthread Puller for the Cutting Procedure The pulling forward of the underthread is necessary so that the thread seperator can bring enough loose underthread to the fixed knife. A distortion of the sewn buttonhole is thus avoided. After the sewing sequence is turned off and the turning movement of the hook block begins the thread pull lever 3 is operated by the latch 6 and cam 11.

  • Page 73: Underthread Puller For The Secure Seam Beginning

    42.6 Underthread Puller for the Secure Seam Beginning In order that the underthread held in the thread gripper not be pulled out of the thread gripper before the actual seam beginning through rapid movement of the material support plate a suitable quantity of thread must be pulled forward by the thread pulling lever 3.
  • Page 74 Caution Risk of Injury ! Pull the mains plug before adjusting. – Bring the machine into its end position. – Tilt the machine head up. – Loosen lock nut 2. – Set the clearance. The clearance between housing 1 and the lower edge the latch 3 should be 42 mm.

  • Page 75: Grinding The Thread Trimming Knives

    43. Grinding the Thread Trimming Knives After a longer period of operation the trimming knives can lose their sharpness. In this case they should be reground or replaced by new knives. New trimming knives are to be ordered with the appropriate order no. from the offices of the DÜRKOPP ADLER AG.

  • Page 76: Grinding The Scissors Knives For Sub-Class - 241000

    43.2 Grinding the Scissors Knives for Sub-class - 241000 The different cutting length assemblies are equipped with different upper and lower knives. Order no.s of the scissors knives for underthread and gimp Cutting length Upper knife Lower knife assembly 558 8816 558 8817 558 8858 558 8859...

  • Page 77: Grinding The Knives For Sub-Class - 221000

    43.3 Grinding the Knives for Sub-class - 221000 The knife for the long trimmer has the order no. 558 7892 Caution Risk of Injury ! Before removing the trimming knife pull the mains plug. – Loosen screws 2. – Remove knife 1 with thread deflector and seperating plate. –...

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