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Pfaff 337 Adjustment Manual

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337
ADJUSTMENT MANUAL
This adjustment manual applies to machines
from the serial number 7 262 535 and
software version 0435/002 onwards.
296-12-19 318/002
Adjustment manual engl. 11.15

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Summary of Contents for Pfaff 337

  • Page 1 ADJUSTMENT MANUAL This adjustment manual applies to machines from the serial number 7 262 535 and software version 0435/002 onwards. 296-12-19 318/002 Adjustment manual engl. 11.15...
  • Page 2 Reprinting, reproduction and/or translation of PFAFF adjustment manuals (including parts thereof) is only permitted with our prior agreement and citation of the source. PFAFF Industriesysteme und Maschinen GmbH Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern...

  • Page 3: Table Of Contents

    Table of Contents Contents ..................Page Adjustment ........................... 5 Tools, gauges and other accessories ..................5 Abbreviations ......................... 5 Explanation of symbols ......................5 Adjusting basic machine ......................6 .04.01 Feed dog position crossways to sewing direction ..............6 .04.02 Feed dog position in sewing direction ................... 7 .04.03 Needle position to needle hole ....................
  • Page 4 Table of Contents Contents ..................Page .05.05 Feed regulator pin height ..................... 23 .05.06 Front turning point of thread catcher ................... 24 .05.07 Aligning thread catcher laterally ................... 25 .05.08 Control cam (recalibrating) ....................26 .05.09 Knife ............................. 27 .05.10 Test cut ..........................28 Parameter settings ......................

  • Page 5: Adjustment

    Adjustment Adjustment Observe and comply with all instructions in the operating manual's chapter 1 Safety! In particular make sure that all safety covers are installed again correctly after making adjustments, see chapter 1.06 Operating manual hazard information! Unless otherwise stated, the machine must be disconnected from the power supply before all adjustment work! Risk of injury due to accidental machine start-up! Notes on adjustment...

  • Page 6: Adjusting Basic Machine

    Adjustment Adjusting basic machine Feed dog position crossways to sewing direction .04.01 Rule The bottom transporter should have the same clearance on the right and left in the needle plate recess. Fig. 13 - 01 O Adjust the bottom transporter 1 (screws 2) according to the rule.

  • Page 7: Feed Dog Position In Sewing Direction

    Adjustment Feed dog position in sewing direction .04.02 Rule The bottom transporter 4 should have the same clearance at the front and back in the needle plate recess in forward and reverse feed at the maximum stitch length setting. Fig. 13 - 02 O Set the maximum stitch length.

  • Page 8: Needle Position To Needle Hole

    Adjustment Needle position to needle hole .04.03 Rule 1. In the sewing direction, a clearance of approximately 0.7 mm should remain between the needle midpoint and the front inside edge of the needle hole. 2. The needle should be at the centre of the needle hole when diagonal to the sewing direction.

  • Page 9: Needle Height (Pre-Calibrating)

    Adjustment Needle height .04.04 (pre-calibrating) Rule When the needle bar is in b.d.c., the clearance between the needle bar and needle plate should be 15 mm. Fig. 13 - 04 O Adjust the needle bar 1 ( screw 2 ) without twisting according to the rule.

  • Page 10: Bottom And Top Feed Sliding Movement

    Adjustment Bottom and top feed sliding movement .04.05 Rule When, approaching from above, the needle bar's lower edge is located 33 mm above the needle plate's upper edge, the top and bottom transporter should not move when the reverse-feed lever is activated. 33 mm Fig.

  • Page 11: Hook-To-Needle Clearance, Needle Bar Rise, Needle Height And Needle Guard

    Adjustment Hook-to-needle clearance, needle bar rise, needle height and needle guard .04.06 Rule When the needle bar rise is positioned 1.8 mm after b.d.c. of the needle bar and with maximum stitch length regulation, 1. the hook point should be at the needle midpoint and have a clearance of 0.05 to 0.1 mm to the needle.

  • Page 12: Top Feed Lift

    Adjustment Top feed lift .04.07 Rule When lever 1 is in the centre of its slotted lever, presser foot 3 and top feed foot 4 should be at the same height above the needle plate. Fig. 13 - 07 O Set the stitch length to "0". O Set lever 1 (screw 2) into the centre of its slotted lever.

  • Page 13: Top Feed Stroke Movement

    Adjustment Top feed stroke movement .04.08 Rule When, approaching from above, the needle bar's lower edge is located 33 mm above the needle plate's upper edge, the top transporter should not move when the slotted lever 3 moves up and down. 33 mm Fig.

  • Page 14: Top Feed Pendulum

    Adjustment Top feed pendulum .04.09 Rule When the stitch length is set to "0" and the machine has a maximum gathering setting, the presser rod 4 should be in the centre between needle bar guide and presser bar. Fig. 13 - 09 O Slide the connecting rod 1 (screw 2) in its slotted lever 3 until you feel it reach the upper stop.

  • Page 15: Needle Thread Tension Release

    Adjustment Needle thread tension release .04.10 Rule When the presser foot is raised, both tension discs should be at least 0.5 mm apart. The clearance of 0.5 mm is the minimum size and may be over 1 mm with thick types of yarn. 0.5 mm Fig.

  • Page 16: Thread Check Spring

    Adjustment Thread check spring .04.11 Rule The movement of the thread check spring 5 should be finished when the needle point punctures the material (spring deflection = approx. 7 mm). The length of the thread check spring deflection may deviate slightly upwards or downwards for reasons relating to the sewing technology.

  • Page 17: Bobbin Winder

    Adjustment Bobbin winder .04.12 Rule 1. When the bobbin winder is switched on, the bobbin winder spindle should be moved easily; when the bobbin winder is switched off, the friction wheel 5 must not touch the drive wheel 1. 2. The bobbin winder should switch off automatically when the fill amount is still around 1 mm from the edge of the bobbin.

  • Page 18: Presser Foot Pressure

    Adjustment Presser foot pressure .04.13 Rule The material should be transported properly even at top sewing speed. No pressure marks should appear on the material. Fig. 13 - 13 O Turn the screw 1 according to the rule.

  • Page 19: Adjusting Thread Trimmer -900/51

    Adjustment Adjusting thread trimmer -900/51 Control cam .05.01 ( pre-calibrating ) Rule When the thread lever is in b.d.c. the groove 4 of the control cam 2 should stand vertical under the feed regulator pin 5. Fig. 13 - 14 O Loosen the screws 1 through the hole in the machine housing.

  • Page 20: Tripping Lever Height

    Adjustment Tripping lever height .05.02 Rule When the needle bar is in b.d.c., there should be a clearance of 1.0 mm between the trip- ping lever 3 and the control cam 4. 1 mm Fig. 1 3- 15 O Move the needle bar to b.d.c. O Adjust the carrier 1 (screws 2) of the tripping lever 3 in the elongated hole according to the rule.

  • Page 21: Feed Regulator Pin

    Adjustment Feed regulator pin .05.03 Rule When the needle bar is in b.d.c., the feed regulator pin 5 should be able to drop easily into the control cam track 7 when the engaging solenoid 6 is activated. Fig. 13 - 16 O Move the needle bar to b.d.c.

  • Page 22: Engaging Solenoid

    Adjustment Engaging solenoid .05.04 Rule When the needle bar is in b.d.c. and the field core 1 is activated up to the stop, there should be a clearance of approx. 0.5 mm between the pawl 7 and the retaining collar 6. 0.5 mm Fig.

  • Page 23: Feed Regulator Pin Height

    Adjustment Feed regulator pin height .05.05 Rule When the thread trimmer is in the neutral position and the pawl 4 is engaged, there should be a clearance of 0.3 mm between the highest point of the control cam 5 and the feed regulator pin 6.

  • Page 24: Front Turning Point Of Thread Catcher

    Adjustment Front turning point of thread catcher .05.06 Rule When the thread catcher 3 is in the front turning point, the rear edge of the thread catcher cutout should still be 1 mm above the front edge of the bobbin case stopper 6. 1 mm Fig.

  • Page 25: Aligning Thread Catcher Laterally

    Adjustment Aligning thread catcher laterally .05.07 Rule When the needle bar is in b.d.c., the thread catcher tip 4 should point exactly at the middle of the needle. Fig. 13 - 20 O Remove the knife 1 (screws 2). O Move the needle bar to b.d.c. O Activate the field core 3 manually and turn the handwheel until the needle bar is posi- tioned at t.d.c.

  • Page 26: Control Cam (Recalibrating)

    Adjustment Control cam .05.08 (recalibrating) Rule If the end of the thread guard 2 is 2 mm behind the middle of the bobbin case position finger 3 looking in the feeding direction, the clearance between the thread catcher tip 4 and the thread guard 2 should be approx.

  • Page 27: Knife

    Adjustment Knife .05.09 Rule If the rear edge of the thread catcher cutout is 1 mm in front of the knife edge, the left knife edge should be flush with the thread catcher edge (see arrow in circle). Fig. 13 - 22 O Loosely unscrew knife 1 (screws 2).

  • Page 28: Test Cut

    Adjustment Test cut .05.10 Rule The knife should be parallel to the thread catcher and both threads must be cut properly. Fig. 13 - 23 O Move the needle bar to b.d.c. and activate the field core 1. O Turn the handwheel (direction of rotation) until the thread catcher 2 is at its front turning point.

  • Page 29: Parameter Settings

    O The "DongleCopy" PC tool is needed to upload software onto the dongle. A description of how to perform an Internet update of control P40 CD as well as the "DongleCopy" PC tool can be downloaded from the Internet address https://partnerweb.pfaff-industrial.com/ .

  • Page 30: Circuit Diagrams

    91-191 585-95 Circuit diagram Part 1 Version 30/07/2015 Circuit Diagrams 91-191 585-95 PED-A PED-B PED-C PED-D n.c. PED-GEN P-ANA shield A PH B PH M1.1 IND. shield GN/YE Ground Sewing Motor Nähmotor n.c. n.c. n.c. +3,3V n.c. IN-EXT1 IN-EXT2 IN-EXT3 IN-EXT4 N.C.
  • Page 31 Circuit diagram 91-191 585-95 Version 30/07/2015 Part 2 180° SYNC. shield Boot_PN BOOT X_IN RXBF- TXBF+ +15V RST_IN RST_PN RXBF+ TXBF- +15V +3,3V IN_ana1 0V_Logik 24V only inputs +24V stab. +24V magn. 24V power output trimmer output back tack output footlift output thread tension +24V magn.
  • Page 32 PFAFF Industriesysteme und Maschinen GmbH Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern Tel.: +49 - 6301 3205 - 0 Fax: +49 - 6301 3205 - 1386 E-mail: info@pfaff-industrial.com Gedruckt in der BRD / Printed in Germany / Imprimé en la R.F.A. / Impreso en la R.F.A...

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