Pfaff 571 Adjustment Manual
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Pfaff 571 Adjustment Manual

Pfaff 571 Adjustment Manual

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Download this manual See also: Instruction Manual, Adjustment Manual
571
574
ADJUSTMENT MANUAL
591
This adjustment manual applies to machines
from the serial number 7 260 186 and
adjustment manual 0435/002 onwards.
296-12-19 305/002
Adjustment Manual engl. 08.15

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Summary of Contents for Pfaff 571

  • Page 1 ADJUSTMENT MANUAL This adjustment manual applies to machines from the serial number 7 260 186 and adjustment manual 0435/002 onwards. 296-12-19 305/002 Adjustment Manual engl. 08.15...
  • 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 Germany...

  • Page 3: Table Of Contents

    Abbreviations ........................5 Explanation of symbols ....................... 5 Adjusting the basic machine ....................6 .04.01 Needle position in sewing direction (on the PFAFF 571 and 591) ......... 6 .04.02 Needle position in sewing direction (on the PFAFF 574) ............7 .04.03 Needle height (pre-calibrating) ....................
  • Page 4 Linkage rod (only on the PFAFF 574) ..................51 Adjust backtacking mechanism -911/................52 .07 .01 Needle in needle hole (on the PFAFF 571 and 591) ............. 52 .07 .02 Clutch for roller presser drive ....................53 .07 .03 Adjust roller presser drive ....................

  • 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 electric supplies before all adjustment work! Risk of injury due to accidental machine start-up! Notes on adjustment...

  • Page 6: Adjusting The Basic Machine

    Adjustment Adjusting the basic machine Needle position in sewing direction .04.01 (on the PFAFF 571 and 591) Rule The needle should be at the centre of the stitch hole looking in the sewing direction with minimum stitch length regulation. Fig. 13 - 01 ...

  • Page 7: Needle Position In Sewing Direction (On The Pfaff 574)

    Adjustment Needle position in sewing direction .04.02 (on the PFAFF 574) Rule The needles should be at the centre of the stitch hole looking in the sewing direction. Fig. 13 - 02  Adjust the needle bar frame (screws 1 and 2) according to the rule.

  • Page 8: Needle Height (Pre-Calibrating)

    Adjustment Needle height .04.03 (pre-calibrating) Rule At TDC there should be a clearance of approx. 21 mm between the needle bar and the needle plate. 21 mm Fig. 13 - 03  Adjust the needle bar 1 (screw 2) without twisting according to the rule.

  • Page 9: Hook-To-Needle Clearance, Needle Bar Rise, Needle Height And Needle Guard (On The Pfaff 571)

    Adjustment Hook-to-needle clearance, needle bar rise, needle height and needle guard .04.04 (on the PFAFF 571) Rule With the needle rise positioned 2.4 mm after BDC of the needle bar and with stitch length regulation "0" 1. the hook point should be at the needle midpoint, and should be at a distance of 0.05 to 0.1 mm to the needle,...

  • Page 10: (On The Pfaff 574)

    Adjustment Hook-to-needle clearance, needle bar rise, needle height and needle guard .04.05 (on the PFAFF 574) Rule On both hooks with the needle rise positioned 2.4 mm after BDC of the needle bar, 1. the hook point should be at the needle midpoint, and should be at a distance of 0.05 to 0.1 mm to the needle,...
  • Page 11 Adjustment  Adjust both hook posts according to rule 1 and tighten the screws 8.  Tighten the screws 1 and 6.  Tighten the screws 3 and 5 allowing for bevel gear wheel movement.  Adjust the retaining collar 10 up against the bevel gear 11 and tighten the screws 2. ...

  • Page 12: Hook-To-Needle Clearance, Needle Bar Rise, Needle Height And Needle Guard (On The Pfaff 591)

    Adjustment Hook-to-needle clearance, needle bar rise, needle height and needle guard .04.06 (on the PFAFF 591) Rule With the needle rise positioned 2.4 mm after BDC of the needle bar and with stitch length regulation "0" 1. the hook point should be at the needle midpoint, and should be at a distance of 0.05 to 0.1 mm to the needle,...

  • Page 13: Needle Position Crossways To Sewing Direction (On The Pfaff 571)

    Adjustment Needle position crossways to sewing direction .04.07 (on the PFAFF 571) Rule The needle should be at the centre of the stitch hole when entering and exiting the needle plate with maximum stitch length regulation. Fig. 13 - 07...

  • Page 14: Needle Position Crossways To Sewing Direction (On The Pfaff 574)

    Adjustment Needle position crossways to sewing direction .04.08 (on the PFAFF 574) Rule The needles should pierce the middle of their stitch holes looking crossways to the sewing direction. Fig. 13 - 08  Adjust the mounting plate 1 (screws 2, on both sides of the post) according to the rule.

  • Page 15: Needle Position Crossways To Sewing Direction (On The Pfaff 591)

    Adjustment Needle position crossways to sewing direction .04.09 (on the PFAFF 591) Rule The needle should pierce the middle of the stitch hole looking crossways to the sewing direction. Fig. 13 - 09  Adjust the feed wheel post 1 (screws 2, 3 and 4) according to the rule.

  • Page 16: Bobbin Case Opener Height And Bobbin Case Opener Travel

     Turn the bobbin case opener 1 (screw 2) according to rule 2. The settings should be repeated on the right post on the PFAFF 574. The setting may differ from rule 2 depending on the thread thickness.

  • Page 17: Feed Wheel Height (On The Pfaff 571)

    Adjustment Feed wheel height .04.11 (on the PFAFF 571) Rule 1. The feed wheel 4 to which pressure is applied should protrude out of the needle plate by the tooth height (approx. 0.8 mm). 2. The feed wheel 4 to which no pressure is applied should have approx. 0.3 mm height clearance.

  • Page 18: Feed Wheel Height (On The Pfaff 574)

    Adjustment Feed wheel height .04.12 (on the PFAFF 574) Rule 1. When pressure is applied to the feed wheel 4, it should protrude from the needle plate by the tooth height (approx. 0.8 mm). 2. The feed wheel 4 to which no pressure is applied should have approx. 0.3 mm height clearance.

  • Page 19: Feed Wheel Height (On The Pfaff 591)

    Adjustment Feed wheel height .04.13 (on the PFAFF 591) Rule The feed wheel should protrude out of the needle plate by the tooth height (approx. 0.8 mm). Fig. 13 - 13  Swivel out the roller presser.  Loosen the screws 1.

  • Page 20: Reverse-Feed Lever Eccentric

    Adjustment Reverse-feed lever eccentric .04.14 Rule If the needle (at the maximum stitch length setting) is 3 mm above the needle plate from the top dead centre position, the crank 3 should have reached its front turning point posi- tion. Fig.

  • Page 21: Stitch Length Scale Dial

    Adjustment Stitch length scale dial .04.15 Rule The marking line should be on the scale dial 1 opposite the lower edge 3 of the belt guard recess if the reverse-feed lever is engaged and in stitch length setting "0". Fig. 13- 15 ...

  • Page 22: Shaft Crank For Feed Wheel Drive

    Shaft crank for feed wheel drive .04.16 Rule The connecting rod 3 or the connecting rods 3 and 4 on the PFAFF 571 and 591 should be able to move freely when turning the handwheel with maximum stitch length regulation. PFAFF 571...

  • Page 23: Shaft Crank For Roller Presser Drive

    Adjustment Shaft crank for roller presser drive .04.17 Rule The connecting rods 3 and 4 should be able to move freely in their left and right turning point position with maximum stitch length regulation. Fig. 13 - 17  Set the maximum stitch length. ...

  • Page 24: Clearance Between Roller Presser And Feed Wheel

    Adjustment Clearance between roller presser and feed wheel .04.18 Rule When the hand lever is raised, the clearance between roller presser and feed wheel should be 7 mm Fig. 13 - 18  Raise the hand lever.  Adjust the presser bar 1 (screws 2) according to the rule. Take care that the roller presser is parallel to the feed wheel.

  • Page 25: Roller Presser

    If the roller presser 1 is fi tted to the feed wheel 5, it should 1. be parallel to the feed wheel 5 looking in the sewing direction, 2. be positioned at the centre of the needle (the left needle on the PFAFF 574) looking in the sewing direction, 3.

  • Page 26: Stitch Length To Stitch Length Scale

    Rule With a stitch length setting of "3" and after 11 punctures in a strip of leather, the overall length from the fi rst to the last puncture should be 30 mm. PFAFF 571 PFAFF 591 PFAFF 574 Fig. 13 - 20 ...

  • Page 27: Synchronisation Of Roller Presser And Feed Wheel

    Adjustment Synchronisation of roller presser and feed wheel .04.21 Rule After approx. 30 stitches in a strip of leather, the overall length from the fi rst to the last puncture should be the same length on the lower and upper leather layer. Fig.

  • Page 28: Press Pad (Only On The Pfaff 574)

    Adjustment Press pad .04.22 (only on the PFAFF 574) Rule The press pad 1 should 1. be as close as possible to the needle looking in the sewing direction and 2. be positioned at the centre of the needle looking crossways to the sewing direction.

  • Page 29: Knee Lever

    Adjustment Knee lever .04.23 Rule 1. Before the roller-presser raises up, the knee lever should have a little bit of clearance. 2. The lever for the roller presser should lower automatically when the knee lever is acti- vated until you feel it stop. 3.

  • Page 30: Release Needle Thread Tension

    Adjustment Release needle thread tension .04.24 Rule 1. When the hand lever is raised, the tension discs 3 should be pushed apart by at least 0.5 mm. 2. The tension must be fully activated when fi tting the roller presser. 0.5 mm Fig.

  • Page 31: Thread Check Spring (On The Pfaff 571 And 591)

    Adjustment Thread check spring .04.25 (on the PFAFF 571 and 591) Rule 1. The movement of the thread check spring 3 should be fi nished when the needle point punctures the material (spring defl ection approx. 7 mm). 2. The thread check spring 3 should lift slightly off the support 1 when forming the maxi- mum thread loop while passing the thread around the hook.

  • Page 32: Thread Check Spring (On The Pfaff 574)

    Adjustment Thread check spring .04.26 (on the PFAFF 574) Rule 1. The movement of the thread check spring 3 should be fi nished when the needle points puncture the material (spring defl ection approx. 7 mm). 2. The thread check spring 3 should lift slightly off the support 1 when forming the maximum thread loops while passing the thread around the hook.

  • Page 33: Bobbin Winder

    Adjustment Bobbin winder .04.27 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 fi ll amount is still around 1 mm from the edge of the bobbin.

  • Page 34: Roller Presser Pressure

    Adjustment Roller presser pressure .04.28 Rule The material should be transported properly even at top sewing speed. No pressure marks should appear on the material. Fig. 1 - 28  Turn the screw 1 according to the rule. The screw 1 is located under the cover.

  • Page 35: Lubrication

    Adjustment Lubrication .04.29 Rule After 10 seconds operation, a light oil strip should appear on a paper strip held to the hook foot. Fig. 13 - 29  Check whether the oil has been added and the oil tubes are free of air. ...

  • Page 36: Re-Engage Safety Clutch

    Adjustment Re-engage safety clutch .04.30 The clutch 1 is set ex works. If the thread jams, the clutch 1 disengages to avoid damage to the hooks. The process to engage the clutch 1 is described below. Fig. 13 - 30 ...

  • Page 37: Adjust Edge Trimmer -725/04

    Adjustment Adjust edge trimmer -725/04 Knife carrier position .05.01 (on the PFAFF 571) Rule When the edge trimmer is switched on and the adjusting wheel 1 is turned until you feel it reach the upper stop, 1. the knife carrier 2 should be parallel to the post and 2.

  • Page 38: Knife Carrier Position (On The Pfaff 591)

    Adjustment Knife carrier position .05.02 (on the PFAFF 591) Rule When the edge trimmer is swung in, the centre of the knife angle should be at the same level as the upper edge of the needle plate. Fig. 13 - 32 ...

  • Page 39: Knife Stroke (On The Pfaff 571)

    Adjustment Knife stroke .05.03 (on the PFAFF 571) Rule The knife stroke can be set within a range of 1.0 to 3.5 mm to optimally suit all materials used. Fig. 13 - 33  Turn the eccentric 1 (screws 2) so that the marking of the desired cutting stroke is...

  • Page 40: Knife Stroke (On The Pfaff 591)

    Adjustment Knife stroke .05.04 (on the PFAFF 591) Rule The knife stroke can be set within a range of 2.0 to 3.5 mm to optimally suit all materials used. Fig. 13 - 34  Adjust the crank 1 (nut 2) in the slotted lever 3 according to the rule.

  • Page 41: Knife Movement (On The Pfaff 571)

    Adjustment Knife movement .05.05 (on the PFAFF 571) Rule When the edge trimmer is swung in and the needle is in the needle hole, the movement of the knife 1 should be half way in front of and half way behind the needle when turning the motor shaft manually.

  • Page 42: Knife Movement (On The Pfaff 591)

    Adjustment Knife movement .05.06 (on the PFAFF 591) Rule When the edge trimmer is swung in and the needle is in the needle hole, the movement of the knife 3 should be half way in front of and half way behind the needle when turning the motor shaft manually.

  • Page 43: Knife Position

    When the edge trimmer is swung in, the knife should touch the needle plate insert lightly, whereby no whistling sound should occur during the trimming. Fig. 13 - 37 PFAFF 571  Turn the screw 1 (screw 2) according to the rule.  Carry out a test cut and maybe repeat the adjustment.

  • Page 44: Adjust Thread Trimmer -900/83

    Adjustment Adjust thread trimmer -900/83 Roller lever neutral position / control cam radial position .06.01 Rule 1. When the thread trimmer is in the neutral position, the lever 5 should fi t closely to the plunger 6 and the roller on the roller lever 7 should be 0.3 mm away from the control cam 3.

  • Page 45: Thread Catcher Carrier Position

    Adjustment Thread catcher carrier position .06.02 Requirement 1. There should be a minimum amount of play between the pinion 3 and the toothed segment 4. 2. The clearance between the toothed segment 4 and the outer edge of the thread catcher carrier 1 should be the same size (see arrow) in both the neutral position and the front turning point position of the catcher.

  • Page 46: Thread Catcher Position

    Adjustment Thread catcher position .06.03 Rule 1. The lower edge of the thread catcher 1 should be 0.1 mm away from the horn of the bobbin case 5. 2. When the thread trimmer device is in the neutral position, the front edge of the thread catcher 1 should be fl...

  • Page 47: Knife Position And Knife Pressure

    Adjustment Knife position and knife pressure .06.04 Rule The knife pressure should be set as low as possible and the cutting operation should be completed safely. Fig. 13 - 41  Adjust the eccentric 1 (screws 2) according to the rule.

  • Page 48: Bobbin Thread Clamp Spring

    Adjustment Bobbin thread clamp spring .06.05 Rule The spring tension of the bobbin thread clamp spring should be as low as possible but clamp the bobbin thread securely after the cutting operation. Fig. 13 - 42  Adjust the bobbin thread clamp spring 1 (screw 2) according to the rule. Check ...

  • Page 49: Manual Test Cut

    Adjustment Manual test cut .06.06 Rule 1. The thread catcher 1 must not push the bobbin thread 3 in front of it during its forward movement. 2. The bobbin thread 3 should be caught securely by the hook 4 in the front turning point position of the thread catcher 1.

  • Page 50: Tension Release

    Adjustment Tension release .06.07 Rule When the magnet is activated, the tension discs 3 should be at least 0.5 mm away from each other. 0.5 mm Fig. 13 - 44  Activate the magnet.  Unscrew the tension mounting plate 1 and align the pressure plate 2 according to the rule.

  • Page 51: Linkage Rod (Only On The Pfaff 574)

    Adjustment Linkage rod .06.08 (only on the PFAFF 574) Rule The driving levers 1 should be parallel when the thread trimmer is the neutral position. Fig. 13 - 45  Adjust the driving levers 1 (screws 2) according to the rule.

  • Page 52: Adjust Backtacking Mechanism -911

    Adjust backtacking mechanism -911/.. Needle in needle hole .07 .01 (on the PFAFF 571 and 591) Rule The needle should have the same clearance to the inner edge of the needle hole for for- ward and reverse stitches with maximum stitch length regulation.

  • Page 53: Clutch For Roller Presser Drive

    Adjustment Clutch for roller presser drive .07 .02 Rule 1. There should be no play between the cross joint 2 and the connecting rod 1. 2. There should be a clearance of 3 mm between the cross joint 2 and the mounting 3 when the roller presser is secured.

  • Page 54: Adjust Roller Presser Drive

    Adjustment Adjust roller presser drive .07 .03 Rule 1. Adjust the bevel gears 5.2 and 3 into their position; there must be minimal play be- tween the bevel gears 5.2 and 3. 2. The bevel gear 3 and bevel gear 4 are engaged when sewing forwards; the bevel gears 5.2.3 and 4 must move at the same time.

  • Page 55: Bevel Gears For Feed Crank Drive

    Adjustment Bevel gears for feed crank drive .07 .04 Rule 1. Adjust the bevel gears 5.2 and 3 into their position; there must be minimal play be- tween the bevel gears 5.2 and 3. 2. The bevel gear 3 and bevel gear 4 are engaged when sewing forwards; the bevel gears 5.2.3 and 4 must move at the same time.

  • Page 56: Adjust Switching Magnet For Feed Crank Drive

    Adjustment Adjust switching magnet for feed crank drive .07 .05 Rule When sewing backwards, the crank 1 must be in its left position and the magnet lever 2 must be at its maximum lift to reach the crank 1 exactly. Fig.

  • Page 57: Adjust Switching Magnet For Feed Crank Drive (On-725/04)

    Adjustment Adjust switching magnet for feed crank drive .07 .06 (on-725/04) Rule When sewing backwards, the crank 1 must be in its left position and the magnet lever 2 must be at its maximum lift to reach the crank 1 exactly. ...

  • Page 58: Parameter Settings

     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 59: Circuit Diagrams 91-191 581-95

    91-191 581-95 Circuit diagram Part 1 Version 29.06.15 Circuit Diagrams 91-191 581-95 PED-A PED-B PED-C PED-D n.c. PED-GEN P-ANA shield A PH B PH IND. M1.1 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 60 Circuit diagram 91-191 581-95 Version 26.06.15 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 function control box P40 CD input manuel backtack input mmount thread input invers backtack +24V stab. +24V magn.
  • Page 61 Notes...
  • Page 62 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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