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Gritzner 1002 Service Manual

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Gritzner
Models
1002/1004
Service Manual

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  • Page 1 Gritzner Models 1002/1004 Service Manual...

  • Page 2: Table Of Contents

    Page Contents Foreword Notes on the sewing machine Adjusting instructions Automatic mechanism 1. Adjustment of the lifting clearance between the feeler finger and the cams (class 1004) 2. Adjustment of the needle zero point for the straight stitch 3. Adjustment of the sideways movement 4.

  • Page 3: Foreword

    Foreword The purpose of this service manual is to assist you in quick and correct repairing of the machines. Adjustments should only be made if the settings deviate from the requirements described herein. When checking or adjusting a machine, always proceed in the order of the worksteps prescribed. For easier reference every workstep is marked with a dot.

  • Page 4: Notes On The Sewing Machine

    Notes on the sewing machine with regard to ambient conditions, treatment, cleaning and safety Ambient conditions The recommended ranges are: Ambient temperature 10° to 40°C (50° to 104°F) Air humidity 20 % to 80 % This machine is a high-quality electro-mechanical device. It is designed for household purposes and should always be supervised when in use.

  • Page 5: Automatic Mechanism

    Automatic Mechanism 1. Adjustment of the lifting clearance between the feeler finger and the cams (class 1004) Requirement: When the right control knob is rotated, the lifting clearance between the feeler finger and the highest points of the cams must be 0.2-0.3 mm (fig. 1). Check: Fold up the carrying handle.

  • Page 7: Adjustment Of The Needle Zero Point For The Straight Stitch

    2. Adjustment of the needle zero point for the straight stitch Requirement: When the control knob for utility and zigzag stitches is set to “left” needle position, the machine must sew a perfectly straight stitch. The lifting clearance between the feeler finger 2 and the highest points of the zigzag cam 1 must be 0.1-0.2 mm (fig.

  • Page 9: Adjustment Of The Sideways Movement

    3. Adjustment of the sideways movement Requirement: At zigzag stitch setting the sideways movement of the needle must take place with the needle at a position higher than the maximum fabric thickness. The needle sideways movement must begin when the needle point is leaving the needle plate. It must be completed before the needle enters the fabric again, approx.

  • Page 11: Adjustment Of The Needle Entry Points In The Needle Slot

    4. Adjustment of the needle entry points in the needle slot Requirement: The needle entry points at the widest zigzag stitch setting must be at the same distance from the left and right side of the needle plate (fig. 4b). At the settings for straight stitch and “middle”...
  • Page 12 0.3 – 0.5 mm...

  • Page 13: Stitch Forming Mechanism

    Stitch forming mechanism 5. Adjustment of the needle clearance in relation to the needle slot Requirement: Between the rear edge of the needle and the rear edge of the needle slot in the needle plate, there should be a clearance of 0.2 mm (fig. 5a). Note: For needle system 130/705 H, the needle size increases the actual size of the needle only at the front of the needle.
  • Page 14 0.2 mm...

  • Page 15: Adjustment Of The Hook-To-Needle Clearance

    6. Adjustment of the hook-to-needle clearance Requirement: At the settings for straight stitch and “middle” needle position, the distance of the sewing hook point from the bottom of the scarf in the needle (130/705 H system) must be 0.05 mm to 0.1 mm (fig. 6). With the right needle swing of the widest zigzag stitch, the sewing hook point must almost touch the needle.
  • Page 16 0.05 mm...

  • Page 17: Adjustment Of The Toothed Segment To The Bevel Gear

    7. Adjustment of the toothed segment to the bevel gear Note: This adjustment is only to be carried out if it is urgently required. Requirement: Toothed segment 61 must not strike the gear housing when the sewing hook timing of 2.5 mm is correctly set (fig.

  • Page 19: Adjustment Of The Sewing Hook Timing

    8. Adjustment of the sewing hook timing Requirement: At the settings for straight stitch and “middle” needle position, when the needle bar has moved from its lowest position 2.5 mm upward, the hook point must be positioned exactly on the center line behind the needle (fig.

  • Page 21: Adjustment Of The Needle Bar Height

    9. Adjustment of the needle bar height Requirement: The distance between the top edge of the needle eye and the sewing hook point must be 0.5 mm at the widest right zigzag penetration (fig. 9b). Check: Remove the presser foot holder completely and the needle plate. Set control knob to the widest zigzag stitch (fig.
  • Page 22 0.5 mm...

  • Page 23: Feed Mechanism

    Feed mechanism 10. Adjustment of the feed dog in crosswise direction Requirement: The left and right clearance of the feed dog in the feed slot must be the same (fig. 10). Check: Check the position of the feed dog with a visual check. Adjustment 1: Remove the needle plate.

  • Page 25: Adjustment Of The Feed Dog In The Feed Slot In Sewing Direction

    11. Adjustment of the feed dog in the feed slot in sewing direction Requirement: At the largest stitch length, the feeding stroke of the feed dog should begin as near as possible to the needle hole (fig. 11). However, the feed dog must not strike against the front or back of the feed slot at the largest forwards and reverse stitches or any other stitch length setting.

  • Page 26: Adjustment Of The Feed Dog Driving Eccentric

    12. Adjustment of the feed dog driving eccentric Requirement: When the hole of the take-up lever is at its highest position, the feed dog must move farther back by 0.4 to 0.8 mm. When screw 45 of the driving eccentric 44 is aligned with the screw 43 of the arm shaft crank 42, the above requirement is fulfilled (fig.

  • Page 27: Adjustment Of The Feed Dog Lifting Eccentric

    13. Adjustment of the feed dog lifting eccentric Requirement: The return movement of the feed dog underneath the needle plate in the forward direction must be completed when the rising feed dog reaches the needle plate surface. The lowering of the feed dog must begin shortly before the end of the feed driving movement. Check: Select the largest stitch length.

  • Page 29: Adjustment Of The Feed Dog Height

    14. Adjustment of the feed dog height Requirement: At the highest feed dog position, the tips of the feed dog teeth must protrude above the needle plate surface by 0.9 mm (fig. 14). Check: Remove the needle and the presser foot shoe. Select the largest stitch length.

  • Page 30: Adjustment Of The Presser Bar Height

    15. Adjustment of the presser bar height Requirement: With the presser bar lifter raised there must be a clearance of approx. 6.0 mm between the needle plate and the zigzag foot shoe (fig. 15a). Check: Set control knob to straight stitch and “middle” needle position. Raise the presser bar lifter.

  • Page 31: Adjustment Of The Zero Point Of The Stitch Length Control

    16. Adjustment of the zero point of the stitch length control Requirement: When the stitch length is set to “0”, the fabric should not be fed. At stitch length setting “2” the length of forward and reverse stitches must be approx. the same. Check: Set the control knob to the straight stitch (fig.

  • Page 32: Stitching Off The Machine

    Stitching off the machine 17. Adjustment of the bobbin thread tension Requirement: The thread pull weight of the bobbin thread using cotton thread 50/2 should be approx. 30 to 35 g. Check: When the threaded bobbin case is hanging on its thread, it must not be caused to slip downwards by its own weight.

  • Page 33: Adjustment Of The Needle Thread Tension

    18. Adjustment of the needle thread tension Requirement: Within the adjusting range from 3 to 5, the interlacing of the needle thread and the bobbin thread (using cotton thread) must take place approximately in the middle of the fabric at straight and zigzag stitch setting.

  • Page 35: Adjustment Of The Feed Dog Standstill Point In A Buttonhole Bartack

    19. Adjustment of the feed dog standstill point in a buttonhole bartack Requirement: The bartack must be sewn on the spot with no feeding motion. Check: Set the control knob to the “bartack” symbol No. 2 (fig. 19). Set stitch length to “4” (fig. 19b). Place a piece of fabric under the buttonhole foot.

  • Page 36: Adjustment Of Equal Stitch Length For Left And Right Buttonhole Seams

    20. Adjustment of equal stitch length for left and right buttonhole seams Requirement: The stitch length of the left buttonhole seam (sewn forward) and of the right buttonhole seam (sewn backward) must be the same (fig. 20). Check: Attach the buttonhole foot. Set control knob to “buttonhole seam”...

  • Page 37: Adjustment Of Equal Stitch Length For Forward/Reverse-Controlled Utility Stitches

    21. Adjustment of equal stitch length for forward/reverse-controlled utility stitches Requirement: The needle perforations for the honeycomb stitch and the stretch triple straight stitch must always take place in the same penetration holes for forward and reverse feed (fig. 21). Check: Set left knob to the widest zigzag stitch setting (fig.

  • Page 39: Making Up A Sewing Sample

    22. Making up a sewing sample When all sewing checks are completed and the machine sews perfectly, a sewing sample should be made. This sewing sample should contain the most important stitch patterns available on the repaired machine. If the customer has special requirements, these should also be included in the sewing sample. The following is an example of a sewing sample (fig.

  • Page 40: Repair Instructions

    Repair Instructions 23. Changing the baseplate Removal: Remove the detachable work support (accessory box) by pulling it to the left. Lay the machine with its back on the table (fig. 23). Turn out both screws 69. Turn out the three screws 70 and remove the baseplate. Refitting Fit the baseplate properly under the machine.

  • Page 41: Changing The Free-Arm Cover

    24. Changing the free-arm cover Removal: Remove the detachable work support (accessory box) by pulling it to the left. Lay the machine with its back on the table (fig. 23). Turn out both screws 69. Turn out the tree screws 70 and remove the baseplate. Turn out both screws 68 (fig.

  • Page 42: Changing The Arm Cover

    25. Changing the arm cover Removal: Fold up the carrying handle (fig. 25). Turn out both screws 71. Remove arm cover by lifting it upwards. Refitting: With the carrying handle in upright position, fit arm cover to the machine checking the position of the thread tensioners and making sure that the arm cover closes without play.

  • Page 43: Changing The Face Cover

    26. Changing the face cover Removal: Fold up the carrying handle. Turn out both screws 71. Remove arm cover by lifting it upwards. Loosens both screws 72 by approx. 2 turns (fig. 26). Remove face cover 73. Refitting: Insert face cover with the hole from behind over the main switch and both guides under the screw heads.

  • Page 44: Changing The Stand Cover

    27. Changing the stand cover Removal: Fold up the carrying handle. Turn out both screws 71. Remove arm cover by lifting it upwards. Turn out screw 87 (fig. 27). Remove stand cover 74. Refitting: Insert stand cover rib 75 in the baseplate and push stand cover onto the machine housing. Insert and tighten screw 87.

  • Page 45: Changing The Motor

    28. Changing the motor Removal: Disconnect the plug from the electrical outlet. Fold up the carrying handle. Turn out both arm cover retaining screws and remove arm cover. Turn out stand cover retaining screw and remove stand cover. Remove the detachable work support (accessory box) by pulling it to the left. Lay the machine on its back.

  • Page 47: Changing The Stitch Length Control

    29. Changing the stitch length control Removal: Disconnect the plug from the electrical outlet. Fold up the carrying handle. Turn out both arm cover retaining screws and remove arm cover. Turn out both stand cover retaining screws and remove stand cover. Loosen both face cover retaining screws and remove face cover.

  • Page 49: Changing The Hook Race Assembly

    30. Changing the hook race assembly Removal: Disconnect the plug from the electrical outlet. Fold up the carrying handle. Turn out both arm cover retaining screws and remove arm cover. Turn out both stand cover retaining screws and remove stand cover. Loosen both face cover retaining screws and remove face cover.

  • Page 51: Changing The Automatic Mechanism

    31. Changing the automatic mechanism Removal: Disconnect the plug from the electrical outlet. Fold up the carrying handle. Turn out both arm cover retaining screws and remove arm cover. Turn out both stand cover retaining screws and remove stand cover. Loosen both face cover retaining screws and remove face cover.

  • Page 53: Electrical Safety Test

    Safety test 32. Electrical safety test According to the German law on safe machine operation of June 24, 1986, VDE regulations are the recognized rules in the field of electrical engineering and form the basis for electrical safety tests of technical appliances. The required electrical tests for the appliances are laid down in paragraph 4 of the regulations for repair, modification and testing of electrical appliances (VDE 0701, edition 10.86).
  • Page 54 Fig. 34...

  • Page 56: Simulated Leakage Current Tests On Motor Assemblies

    34. Simulated leakage current tests on motor assemblies with ABB Metrawatt 5013 V) Simulated leakage current tests on motor assemblies When replacing the whole motor or motor parts respectively (field, armature or capacitor), the simulated leakage current of the motor must be tested before the motor is reinstalled. Set the testing range switch at “20 mA”...
  • Page 57 Notes:...
  • Page 59 PFAFF Amalienbadstraße 36 76227 Karlsruhe Fernruf (0721) 40010 Technische Änderungen vorbehalten Fernschreiber 7825638 Subject to alterations in design Drahtwort Pfaffwerk Sous toute réserve de modifications techniques Telefax (0721) 4001513 Salvo modificaciones técniche Druckerei Gablenz GmbH Con riserva di modifiche tecniche Stettiner Straße 17 76356 Weingarten No.

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