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Pfaff 571 Adjustment Manual

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See also: Instruction Manual
571
574
ADJUSTMENT MANUAL
591
This Adjustment Manual is valid for machines
from the following serial numbers onwards:
# 7 250 050
296-12-19 233/002
Justieranleitung engl. 10.14
®
Industrial

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Summary of Contents for Pfaff 571

  • Page 1 ® Industrial ADJUSTMENT MANUAL This Adjustment Manual is valid for machines from the following serial numbers onwards: # 7 250 050 296-12-19 233/002 Justieranleitung engl. 10.14...
  • Page 2 The reprinting, copying or translation of PFAFF Adjustment Manuals, whether in whole or in part, is only permitted with our previous authorization and with written reference to the source. PFAFF Industriesysteme und Maschinen AG Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern...

  • Page 3: Table Of Contents

    .04.03 Preliminary adjustment of the needle height ................. 9 .04.04 Needle rise, hook clearance, needle height and needle guard (on the PFAFF 571) ....10 .04.05 Needle rise, hook clearance, needle height and needle guard (on the PFAFF 574) ....12 .04.06...
  • Page 4 Linkage rod (only for the PFAFF 574) ................... 54 Adjustment of backtacking mechanism -911/............... 55 .07 .01 Needle in needle hole (only for PFAFF 571 and 591) ............55 .07 .02 Couping for roller presser drive ................... 56 .07 .03...
  • Page 5 Circuit diagrams ........................ 63 Reference list for the Circuit diagrams 91-191 524-95 and 91-191 534-95 ......63 Block diagram PFAFF 570 / 590 with control unit P40 ED ..........65 Circuit diagrams 91-191 524-95 ..................66 Block diagram PFAFF 570 / 590 with control unit P44 PD-L ..........68...

  • Page 6: Adjustment

    Adjustment Adjustment Please observe all notes from Chapter 1 Safety of the instruction manual! In particular care must be taken to see that all protective devices are refi tted properly after adjustment, see Chapter 1.06 Danger warnings of the instruc- tion manual! If not otherwise stated, the machine must be disconnected from the electrical power supply.

  • Page 7: Adjusting The Basic Machine

    Adjusting the basic machine Needle position in sewing direction .04.01 (on the PFAFF 571 and 591) Requirement With the stitch length set at its minimum, the needle should be positioned in the centre of the needle hole, as seen in the direction of sewing.

  • Page 8: Needle Position In Sewing Direction (On The Pfaff 574)

    Adjustment Needle position in sewing direction .04.02 (on the PFAFF 574) Requirement The needle should be positioned in the centre of the needle hole as seen in the direction of sewing. Fig. 1 - 02 Adjust needle bar (screws 1 and 2) according to the requirement.

  • Page 9: Preliminary Adjustment Of The Needle Height

    Adjustment Preliminary adjustment of the needle height .04.03 Requirement When the needle bar is at TDC, there must be a clearance of approx. 21 mm between the needle point and the needle plate. 21 mm Fig. 1 - 03 Adjust needle bar 1 (screw 2), without turning it, according to the requirement.

  • Page 10: Needle Rise, Hook Clearance, Needle Height And Needle Guard (On The Pfaff 571)

    Adjustment Needle rise, hook clearance, needle height and needle guard .04.04 (on the PFAFF 571) Requirement With the needle bar positioned 2,4 mm after BDC and the stitch length set at "0" the hook point must be at needle centre with a hook-to-needle clearance of 0.05 to 0.1 mm;...
  • Page 11 Adjustment Set hook point at needle centre, making sure that the needle is not defl ected by needle guard 6. Adjust needle height according to Requirement 2. Adjust hook post according to Requirement 1 and tighten screws 4 and 5. Making sure that there is some play in the bevel gear, tighten screws 1.

  • Page 12: Needle Rise, Hook Clearance, Needle Height And Needle Guard (On The Pfaff 574)

    Adjustment Needle rise, hook clearance, needle height and needle guard .04.05 (on the PFAFF 574) Requirement In needle rise position 2.4 mm after B.D.C, on both hooks the hook point must be at needle centre with a hook-to-needle clearance of 0.05 to 0.1 mm;...
  • Page 13 Adjustment Loosen screws 1, 2, 3, 4, 5, 6 and 7. Loosen screws 8 slightly. Bring the needle bar into needle rise position 2.4 mm after BDC. Set both hook points at needle centre, making sure that the needles are not defl ected by needle guard 9.

  • Page 14: Needle Rise, Hook Clearance, Needle Height And Needle Guard (On The Pfaff 591)

    Adjustment Needle rise, hook clearance, needle height and needle guard .04.06 (on the PFAFF 591) Requirement In needle rise position 2.4 mm after B.D.C, and with the stitch length set at "0" the hook point must be at needle centre with a hook-to-needle clearance of 0.05 to 0.1 mm;...
  • Page 15 Adjustment Set stitch length at "0". Loosen screws 1, 2, 3, 4 and 5. Bring the needle bar into needle rise position 2.4 mm after B.D.C. Set hook point at needle centre, making sure that the needle is not defl ected by needle guard 6.

  • Page 16: Needle Position Crosswise To Sewing Direction (On The Pfaff 571)

    Adjustment Needle position crosswise to sewing direction .04.07 (on the PFAFF 571) Requirement When the stitch length is set at its maximum, the needle must be positioned in the cen- tre of the needle hole when entering and coming out of the needle plate.

  • Page 17: Needle Position Crosswise To Sewing Direction (On The Pfaff 574)

    Adjustment Needle position crosswise to sewing direction .04.08 (on the PFAFF 574) Requirement As seen crosswise to the sewing direction, the needles must penetrate in the centre of their needle holes. Fig. 1 - 08 Shift bearing plate 1 (screws 2, on both sides of the post) according to the requirement.

  • Page 18: Needle Position Crosswise To Sewing Direction (On The Pfaff 591)

    Adjustment Needle position crosswise to sewing direction .04.09 (on the PFAFF 591) Requirement As seen crosswise to the sewing direction, the needle must penetrate in the centre of the needle hole. Fig. 1 - 09 Adjust feed wheel post 1 (screws 2, 3 and 4) according to the requirement.

  • Page 19: Height And Stroke Of The Bobbin Case Opener

    Adjust bobbin case opener 1 (screw 2) in accordance with requirement 2. On the PFAFF 574 these adjustments must be repeated on the right post. Depending on the thread size, a variation of the setting in Requirement 2 is...

  • Page 20: Height Of The Feed Wheel (On The Pfaff 571)

    Adjustment Height of the feed wheel .04.11 (on the PFAFF 571) Requirement When pressure is applied to the feed wheel 4, it should protrude from the needle plate by tooth height (approx. 0.8 mm) When no pressure is applied to the feed wheel 4 , it should have a vertical play of ap- prox.

  • Page 21: Height Of The Feed Wheel (On The Pfaff 574)

    Adjustment Height of the feed wheel .04.12 (on the PFAFF 574) Requirement When pressure is applied to the feed wheel 4, it should protrude from the needle plate by tooth height (approx. 0.8 mm) When no pressure is applied to the feed wheel 4 , it should have a vertical play of ap- prox.

  • Page 22: Height Of The Feed Wheel (On The Pfaff 591)

    Adjustment Height of the feed wheel .04.13 (on the PFAFF 591) Requirement The feed wheel should protrude from the needle plate by tooth height (approx. 0.8 mm) Fig. 1 - 13 Swing out the roller presser. Loosen screws 1. Adjust eccentric 3 (fastening screw accessible through hole 2) according to the require- ment.

  • Page 23: Stitch Length Control Eccentric

    Adjustment Stitch length control eccentric .04.14 Requirement When the needle (with maximum stitch length set), coming from TDC, is 3 mm above the needle plate, the crank 3 must have reached its front point of reversal. Fig. 1 - 14 Set the maximum stitch length.

  • Page 24: Stitch Length Scale Disk

    Adjustment Stitch length scale disk .04.15 Requirement When the stitch length control device is engaged and the stitch length is set at “0” , the marking line on scale disk 1 should be positioned opposite the lower edge 3 of the guard belt opening.

  • Page 25: Shaft Crank To Feed Wheel Drive

    Requirement When the maximum stitch length is set, the linkage rod 3, or linkage rods 3 and 4 on the PFAFF 571 and 591, must be able to move freely when the balance wheel is turned. PFAFF 571 PFAFF 591 PFAFF 574 Fig.

  • Page 26: Shaft Crank To Roller Presser Drive

    Adjustment Shaft crank to roller presser drive .04.17 Requirement When the maximum stitch length is set, the linkage rods 3 and 4 must be able to move freely at their left and right point of reversal when the balance wheel is turned. Fig.

  • Page 27: Clearance Between Roller Presser And Feed Wheel

    Adjustment Clearance between roller presser and feed wheel .04.18 Requirement When the presser bar lifter is raised, the clearance between the roller presser and the feed wheel must be 7 mm. Fig. 1 - 18 Raise the presser bar lifter. Adjust the presser bar 1 (screws 2) according to the requirement.

  • Page 28: Roller Presser

    Adjustment Roller presser .04.19 Requirement When the roller presser 1 is touching the feed wheel 5 it must be parallel to feed wheel 5, as seen in the direction of sewing, be in the centre of the needle (on model 574 the left needle), as seen in the direction of sewing, be as near as possible to the needle (on model 574 the left needle), as seen crosswise to the direction of sewing.

  • Page 29: Stitch Length On Stitch Length Scale

    When the stitch length is set at "3", and after the needle has entered a strip of leather 11 times, the total length from the fi rst to last needle penetration must be 30 mm. PFAFF 571 PFAFF 591 PFAFF 574 Fig.

  • Page 30: Synchronization Of Roller Presser And Feed Wheel

    Adjustment Synchronization of roller presser and feed wheel .04.21 Requirement After 30 needle penetrations in a strip of leather the total length from the fi rst to the last penetration should be the same, both in the lower and the upper leather layer. Fig.

  • Page 31: Retainer (Only On Model 574)

    Adjustment Retainer .04.22 (only on PFAFF 574) Requirement The retainer 1 must at least be even with the right needle, as seen in the direction of sewing and be as close as possible to the right needle, as seen crosswise to the direction of sewing When the roller presser is lowered, the space between retainer 1 and material must be 0,2-0,3mm.

  • Page 32: Knee Lever

    Adjustment Knee lever .04.23 Requirement Before the roller presser rises, the knee lever must still have a slight play. When the knee lever is raised as far as possible, the lever for the roller presser must drop automatically. Knee lever bar 5 must be at an angle of approx. 75° to the bedplate. Fig.

  • Page 33: Needle Thread Tension Release

    Adjustment Needle thread tension release .04.24 Requirement When the presser bar lifter is raised, the tension discs 3 should be pressed at least 0.5 mm apart. When the roller presser is lowered, the tension must be fully effective. 0,5 mm Fig.

  • Page 34: Thread Check Spring (Pfaff 571 And 591)

    Adjustment Thread check spring .04.25 (PFAFF 571 and 591) Requirement 1. The movement of thread check spring 3 should be completed when the needle point penetrates the fabric (spring stroke approx. 7 mm). 2. When the largest thread loop is formed while the thread is passed around the hook, the thread check spring 3 should rise slightly from its support Fig.

  • Page 35: Thread Check Springs (Pfaff 574)

    Adjustment Thread check springs .04.26 (PFAFF 574) Requirement 1. The movement of thread check spring 3 should be completed when the needle point penetrates the fabric (spring stroke approx. 7 mm). 2. When the largest thread loop is formed while the thread is passed around the hook, the thread check spring 3 should rise slightly from its support 1.

  • Page 36: Bobbin Winder

    Adjustment Bobbin winder .04.27 Requirement When the bobbin winder is engaged, the winding spindle must be driven reliably. When the bobbin winder is disengaged, the friction wheel 5 must not be moved by drive wheel 1. The bobbin winder must switch itself off, when the fi lled thread is about 1 mm from the edge of the bobbin.

  • Page 37: Pressure Of Roller Presser

    Adjustment Pressure of roller presser .04.28 Requirement The material must be fed smoothly. No pressure marks should be visible on the material. Fig. 1 - 28 Adjust roller presser pressure with screw 1 according to the requirement. Screw 1 is located under a cover. If the presser foot pressure is low, the lowering speed of the presser foot can be increased with parameter „202“, see Chapter 1.08 Parameter settings .

  • Page 38: Lubrication

    Adjustment Lubrication .04.29 Requirement After a running time of 10 seconds a fi ne line of oil should form on a strip of paper held next to the hook. 129-011 Fig. 1 - 29 Check whether oil has been fi lled in and that there is no air in the oil lines. Let the machine run for 2-3 min.

  • Page 39: Re-Engage Safety Coupling

    Adjustment Re-engage safety coupling .04.30 The coupling 1 is set by the manufacturer. When the thread jams, the coupling 1 disengages in order to avoid damage to the hooks. A description of how to engage the coupling follows. Fig. 1 - 30 Remove jammed thread.

  • Page 40: Adjusting The Edge Trimmer -725/04

    Adjustment Adjusting the edge trimmer -725/04 Position of the knife holder .05.01 (on model 571) Requirement When the thread trimmer is engaged and the adjusting wheel has been turned to its high- est position the knife holder 2 must be parallel to the post and the top edge of the needle plate must be in the centre of the angular knife opening.

  • Page 41: Position Of The Knife Holder (On Model 591)

    Adjustment Position of the knife holder .05.02 (on model 591) Requirement When the thread trimmer is engaged, the centre of the angular knife opening must be le- vel with the top edge of the needle plate. Fig. 1 - 32 Switch off the machine and engage the edge trimmer.

  • Page 42: Knife Stroke (On Model 571)

    Adjustment Knife stroke .05.03 (on model 571) Requirement The knife stroke can be adjusted over a range from 1.0 to 3.5 mm, allowing the best possible adaption to all materials used. Fig. 1 - 33 Turn eccentric 1 (screws 2) so that the marking of the desired cutting stroke is opposite...

  • Page 43: Knife Stroke (On Model 591)

    Adjustment Knife stroke .05.04 (on model 591) Requirement The knife stroke can be adjusted over a range from 2.0 to 3.5 mm, allowing the best possible adaption to all materials used. Fig. 1 - 34 Adjust crank 1 (nut 2) in slotted lever 3 according to the requirement.

  • Page 44: Cutting Stroke (On Model 571)

    Adjustment Cutting stroke .05.05 (on model 571) Requirement When the edge trimmer is engaged and the needle is in the needle hole, the stroke of knife 1 should be half in front of and half behind the needle, when the motor shaft is tur- ned by hand.

  • Page 45: Cutting Stroke (On Model 591)

    Adjustment Cutting stroke .05.06 (on model 591) Requirement When the edge trimmer is engaged and the needle is in the needle hole, the stroke of knife 3 should be half in front of and half behind the needle, when the motor shaft is tur- ned by hand.

  • Page 46: Knife Position

    When the edge trimmer is engaged, the knife should rest lightly on the needle plate in- sert, but no whistling sound should occur during trimming. Fig. 1 - 37 PFAFF 571 Adjust screw 1 (screw 2) according to the requirements. Carry out a cutting test and repeat adjustment if necessary.

  • Page 47: Adjusting The Thread Trimmer -900/83

    Adjustment Adjusting the thread trimmer -900/83 Resting position of the roller lever / radial position of the control cam .06.01 Requirement When the thread trimmer is in is resting position, lever 5 should be touching piston 6 and the roller of roller lever 7 should be 0.3 mm away from control cam 3. When the take-up lever is at t.d.c., control cam 3 should just have placed roller lever 7 in its resting position.

  • Page 48: Position Of The Thread Catcher Holder

    Adjustment Position of the thread catcher holder .06.02 Requirement There should be a minimum amount of play between toothed wheel 3 and toothed segment 4. Both in the neutral position and the foremost position of the catcher, the distance bet- ween the toothed segment 4 and the outer edge of the thread catcher holder 1 should be the same (see arrow).

  • Page 49: Position Of The Thread Catcher

    Adjustment Position of the thread catcher .06.03 Requirement The bottom edge of the thread catcher 1 should be at a distance of 0.1 mm from the positioning fi nger of the bobbin case 5. When the thread trimmer is in its resting position, the rear edge of thread catcher 1 should be po sitioned behind the edge of knife 2.5mm-3mm.

  • Page 50: Knife Position And Knife Pressure

    Adjustment Knife position and knife pressure .06.04 Requirement The knife pressure should be set as low as possible but the cutting operation should still be carried out reliably. Fig. 1 - 41 129-020 Adjust eccentric 1 (screw 2) in accordance with the requirement.

  • Page 51: Bobbin Thread Retaining Spring

    Adjustment Bobbin thread retaining spring .06.05 Requirement The tension of the bobbin thread clamp spring should be as low as possible, but it should reliably hold the bobbin thread after trimming. 129-060 Fig. 1 - 42 129-021 Adjust bobbin thread clamp spring 1 (screws 2) in accordance with requirement. Control After the thread has been cut, sew a few stitches by turning the balance wheel, checking whether the bobbin thread is drawn out of the bobbin thread clamp spring between the...

  • Page 52: Manual Cutting Test

    Adjustment Manual cutting test .06.06 Requirement When thread catcher 1 is on its forward stroke, it must not carry bobbin thread 3 for- ward too. When thread catcher 1 is in its front position, bobbin thread 3 must be held reliably by hook 4.

  • Page 53: Releasing The Tension

    Adjustment Releasing the tension .06.07 Requirement When the magnet is activated, tension discs 3 must be at least 0.5 mm apart. 0,5 mm Fig. 1 - 44 Activate the magnet. Detach the tension bearing plate 1 and adjust pressure plate 2 in accordance with the re- quirement.

  • Page 54: Linkage Rod (Only For The Pfaff 574)

    Adjustment Linkage rod .06.08 (only for the PFAFF 574) Requirement When the thread trimmer is in its resting position, the drive levers 1 must be parallel. Fig. 1 - 45 Adjust drive levers 1 (screws 2) in accordance with the requirement.

  • Page 55: Adjustment Of Backtacking Mechanism -911

    Adjustment of backtacking mechanism -911/.. Needle in needle hole .07 .01 (only for PFAFF 571 and 591) Requirement When the maximum stitch length is set, the needle must be the same distance from the inside edge of the needle hole, both for forward and reverse stitch.

  • Page 56: Couping For Roller Presser Drive

    Adjustment Coupling for roller presser drive .07 .02 Requirement It should be no gap between bottom of universal joint 2 and link 1. When installing roller foot,it must be retained a distance of 3 mm between top of universal joint 2 and bottom of mounting bracket 3. Fig.

  • Page 57: Adjusting The Roller Presser Drive

    Adjustment Adusting the roller presser drive .07 .03 .07 .03 Requirement Engage vel gear 5 to 2 and gear 3 in its position. There must be a slight play between bevel gear 5 and gear 2, gear 3. When sewing forwards, gear 3 and gear 4 are engaged, bevel gear 5 must drive gear 2, gear 3 and gear 4 simultaneously.

  • Page 58: Bevel Gears For Feed Wheel Drive

    Adjustment Bevel gears for feed wheel drive .07 .04 Requirement Engage vel gear 5 to 2 and gear 3 in its position. There must be a slight play between bevel gear 5 and gear 2, gear 3. When sewing forwards, gear 3 and gear 4 are engaged, bevel gear 5 must drive gear 2, gear 3 and gear 4 simultaneously.

  • Page 59: Adjusting The Magnets For Feed Wheel Drive

    Adjustment Adusting the magnet for feed wheel drive .07 .05 Requirement When sewing backwards, crank 1 is located at its left limit position, magnet lever 2 must reach its largest stroke and touch crank 1 exactly. Fig. 1 - 50 Adjust magnet 3 (screws 4) according to requirement.

  • Page 60: Adjusting The Magnets For Feed Wheel Drive (-725/04)

    Adjustment Adusting the magnet for feed wheel drive (for -725/04) .07 .06 Requirement When sewing backwards, crank 1 is in its left limit position, magnet lever 2 must reach its largest stroke and touch crank 1 exactly. Fig. 1 - 51 Adjust magnet 3 (screws 4) according to requirement.

  • Page 61: Parameter Settings

    (needle reference position Needle position 1 (needle lowered) B, C 0 -255 Needle position 2 (take-up lever raised) B, C 0 -255 571 224 574 230 591 224 0 - 255 Needle position 5 (end cutting signal 1 B, C B, C...
  • Page 62 0 - 1 0 = 1:1 1 = variable On the PFAFF 574 the machine class 6 and on the PFAFF 591 the machine class 4 must be entered. Further parameters and the description for an internet update of the machine software and reset /cold start of the machine can be found in the instruction manual for the control panel.

  • Page 63: Circuit Diagrams

    Circuit diagrams Circuit diagrams Reference list for the Circuit diagrams 91-191 524-95 and 91-191 534-95 Control package Control unit P40ED Control unit P44PD BDF-S3 control panel PicoTop control panel Sewing head recognition(OTE) Sewing lamp LED reverse stitch counting Sewing motor with incremental transmitter Externer Positionsgeber PD3 (574) Hauptschalter Pedal (speed control unit)
  • Page 64 Circuit diagrams Control package Thread tension release plug (FSL) Control panel plug Start inhibitor plug Sewing head recognition plug f i l ) . . Thread trimmer ( -900/.. ) ) . . l l o presser ) . . wheel ) .

  • Page 65: Block Diagram Pfaff 570 / 590 With Control Unit P40 Ed

    = Light barrier VR1 = Roller presser release VR2 = Feed switch-over VR3 = VR3 – magnet (needle) only on the 571 + 591 = Thread tension release PFA = Automatic presser foot lift -900 = Thread trimmer...

  • Page 66: Circuit Diagrams 91-191 524-95

    Circuit diagrams 91-191 524-95 Version 18.06.07 Part 1 Circuit diagrams 91-191 524-95...
  • Page 67 Circuit diagrams 91-191 524-95 Version 18.06.07 Part 2...

  • Page 68: Block Diagram Pfaff 570 / 590 With Control Unit P44 Pd-L

    Control package P44 PD-L = Light barrier VR1 = Roller presser release VR2 = Feed switch-over VR3 = VR3 – magnet (needle) only on the 571 + 591 = Thread tension release PFA = Automatic presser foot lift -900 = Thread trimmer...

  • Page 69: Circuit Diagrams 91-191 534-95

    Circuit diagrams 91-191 534-95 Version 12.03.08 Part 1 Circuit diagrams 91-191 534-95...
  • Page 70 91-191 534-95 Circuit diagrams Part 2 Version 12.03.08...
  • Page 72 PFAFF Industriesysteme und Maschinen AG Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern Telefon: +49 - 6301 3205 - 0 Telefax: +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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