Pfaff 574 User's Manual
Contents
1. 2 02 PFAFF 570 590 with MD 4 57 220 CE VR1 VR3 FSL 570 590 2 6 97 53 g S PFA 9 S1 2 VR2 STOP 900 E 2 2 16 Speedcontrolunit m a 2 E A Control panel C 200 1 0 Control unit MD 4 57 220 CE VR1 VR2 VR3 FSL PFA 900 STOP Roller presser release Feed switch over VR3 magnet needle only on the 571 591 Thread tension release Automatic presser foot lift Thread trimmer Start inhibitor power switch Mains plug 62 PFAFF Block diagram 2 03 PFAFF 570 590 with MJ 0 00 215 CE Synchronizer 570 590 Uy N n S Ineo Control uni MJ 0 00 215 CE Eas power switch Mains plug PFAFF 63 Designed Gerr Europdische Union Wachstum durch Innovation EFRE PFAFF PFAFF Industriesysteme und Maschinen AG Hans Geiger Str 12 IG Nord D 67661 Kaiserslautern Phone 49 6301 3205 0 Fax 49 6301 3205 1386 E mail info pfaff industrial com Hotlines Technical service 49 175 2243 101 Application consultance2. Fig 1 48 Remove control unit 1 screws 2 EF Adjust bevel gear 3 screws 4 according to requirement 1 Adjust bevel gear 5 screws 6 according to requirement 2 The cogs of bevel gears 3 and 5 must be aligned PFAFF 57 Adjustment 1 07 04 Bevel gear play Requirement 1 When sewing forwards there must be a slight play between bevel gears 6 and 7 2 When sewing backwards there must be a slight play between bevel gears 6 and 8 3 The clearance between bevel gear 6 and the shaft 10 must be 0 2 mm ae Pe a Adjust bracket 1 screws 2 according to requirement 1 EF Move unit 3 by hand as far as possible to the left Adjust screw 4 nut 5 according to requirement 2 Bevel gear 6 screws 9 according to requirement 3 58 PFAF ee Adjustment 1 07 05 P Adjusting the magnets Requirement When switch unit 1 is in its left stop position 1 The magnet frame 2 should be positioned at the top stop position and 2 The magnet tappet 4 should be completely extended 3 When the magnet tappet 4 is extended there should be no play between the magnet tappet and lever 5 Fig 1 51 Manually slide switch unit 1 as far as possible to the lef
3. 129 013 Fig 1 38 Having made sure that piston 6 is positioned against the left stop adjust magnet 1 2 screws in accordance with requirement 1 Adjust control cam 3 screws 4 in accordance with requirement 2 Attach collar 8 screw 9 to roller 10 PFAFF 47 Adjustment 1 06 02 Position of the thread catcher holder Requirement 1 There should be a minimum amount of play between toothed wheel 3 and toothed segment 4 2 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 TJ i f 129 066 Fig 1 39 A Adjust the thread catcher holder 1 screws 2 according to the requirements If requirement 2 cannot be fulfilled loosen screw 2 and move the toothed segment 4 by one tooth 48 PFAF ee Adjustment 1 06 03 Position of the thread catcher Requirement 1 The bottom edge of the thread catcher 1 should be at a distance of 0 1 mm from the positioning finger of the bobbin case 5 2 When the thread trimmer is in its resting position the front edge of thread catcher 1 should be flush with the edge of knife 6 N aN I O KAJ Si Fig 1 40 Turn thread catcher 1 screw 3 in accordance with requirement 2 Thre
4. Remove jammed thread Hold coupling 1 with screw 2 and turn the balance wheel until you feel coupling 1 snap back into place again PFAFF Adjustment 1 05 Adjusting the edge trimmer 725 04 1 05 01 Position of the knife holder on model 571 Requirement When the thread trimmer is engaged and the adjusting wheel has been turned to its high est position 1 the knife holder 2 must be parallel to the post and 2 the top edge of the needle plate must be in the centre of the angular knife opening 61 050 Fig 1 31 Turn the adjusting wheel 1 to its highest position and engage edge trimmer Adjust knife holder 2 screw 3 according to the requirements 40 PFAF ee Adjustment 1 05 02 Position of the knife holder on models 574 and 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 gt Fig 1 32 Switch off the machine and engage the edge trimmer Loosen screw 1 By turning sccentric 2 position the knife in the centre of its adjustment range Adjust knife holder 3 according to the requirement and tighten screw 1 Position locking ring 4 on the knife holder 3 Depending on the material thickness changes in the basic setting of eccentric 2 are possible PFAFF
5. Compare the total sewn length of the lower and upper leather layer Adjust clamp 1 screw 2 according to the requirement Clamp 1 must not be positioned diagonally to the rock shaft 30 PFAF ee Adjustment 1 04 22 ye Retainer only on model 574 Requirement The retainer 1 must 1 be as close as possible to the needle as seen in the direction of sewing and 2 be in the centre of the needle as seen crosswise to the direction of sewing 3 When the roller presser is lowered the distance between the retainer 1 and the work piece must be 0 2 0 3 mm 129 010 Me 7 Adjust retainer 1 screw 2 according to requirement 3 Adjust bracket 3 screw 4 according to requirement 1 and 2 PFAFF 31 Adjustment 1 04 23 Knee lever Requirement 1 Before the roller presser rises the knee lever must still have a slight play 2 When the knee lever is raised as far as possible the lever for the roller presser must drop automatically 3 Knee lever bar 5 must be at an angle of approx 75 to the bedplate D Fig 1 23 Adjust screw 1 nut 2 according to requirement 3 Adjust screw 3 nut 4 according to requirement 2 Set bar 5 Screws 6 according to requirement 3 32 PFAF ee Adjustment 1 04 24 Needle thread tension release Requirement 1 When the presser bar lifter is raised
6. 41 Adjustment 1 05 03 Knife stroke 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 6 Turn eccentric 1 screws 2 so that the marking of the desired cutting stroke is opposite the marking on clamp collar 3 je Fig 1 33 42 PFAF ee Adjustment 1 05 04 Knife stroke on models 574 and 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 a i i 5 Fig 1 34 ZF Adjust crank 1 nut 2 in slotted lever 3 according to the requirement PFAFF 43 Adjustment 1 05 05 Cutting stroke 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 Fig 1 35 Switch off the machine and engage the edge trimmer Adjust knife 1 screw 2 according to the requirement 44 PFAF ee Adjustment 1 05 06 A Cutting stroke on models 574 and 591 Requirement When the edge trimmer is engaged and the needle is
7. the tension discs 3 should be pressed at least 0 5 mm apart 2 When the roller presser is lowered the tension must be fully effective Fig 1 24 EF Align tension mounting plate 1 and pressure plate 2 according to the requirement PFAFF 33 Adjustment 1 04 25 Thread check spring PFAFF 571 and 591 Requirement 1 The movement of thread check spring 7 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 7 should rise slightly from its support Fig 1 25 Adjust support 1 screw 2 according to requirement 1 To adjust the spring tension turn screw 3 screw 4 Adjust the thread regulator 5 screw 6 according to requirement 2 For technical reasons it may be necessary to deviate from the specified spring stroke or spring tension Move the thread regulator 5 screw 6 towards more thread or less thread 34 PFAF ee Adjustment 1 04 26 Thread check springs PFAFF 574 Requirement 1 The movement of thread check springs 3 and 6 should be completed when the need le points penetrate the fabric spring stroke approx 7 mm 2 When the largest thread loop is formed while the thread is passed around the
8. and tightened again afterwards Tools gauges and other accessories 1 set of screwdrivers with blade widths from 2 to 10 mm 1 set of open ended wrenches with opening sizes from 7 to 13 mm 1 set of allen keys from 1 5 to 6 mm 1 clamp Order No 08 880 137 00 1 metal rule Order No 08 880 218 00 1 gauge Order No 08 880 136 01 Sewing thread and test material PFAFF Adjustment 1 02 Abbreviations TDC top dead center BDC bottom dead center 1 03 Explanation of the symbols In this adjustment manual symbols emphasize operations to be carried out or important in formation The symbols used have the following meaning Note information Service repair adjustment maintenance work to be carried out by qualified staff only 6 PFAF ee Adjustment 1 04 1 04 01 PA Adjusting the basic machine Needle position in sewing direction 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 OP he ye S Fig 1 01 2 Set the minimum stitch length Adjust needle bar screw 1 according to the requirement PFAFF Adjustment 1 04 02 Needle position in sewing direction on the PFAFF 574 Requirement The n
9. fed smoothly No pressure marks should be visible on the material Fig 1 28 EF Adjust roller presser pressure with screw 1 according to the requirement PFAFF 37 Adjustment 1 04 29 Lubrication Requirement After a running time of 10 seconds a fine line of oil should form on a strip of paper held next to the hook PBI N a 3 gt Ra ila HOI o jee 129 011 Fig 1 29 Check whether oil has been filled in and that there is no air in the oil lines EF Let the machine run for 2 3 min While the machine is running do not place hands in the needle or hook area AN Danger of injury from moving parts With the machine running hold a strip of paper on the hook and check the requirement f necessary adjust the oil flow on screw 1 PFAFF 38 Adjustment 1 04 30 gee Re engage safety coupling 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 xs ANNA W lt a VO 4 ID Sas F W EA lt Jen o cc hl o Fig 1 30
10. 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 Fig 1 36 Switch off the machine and engage the edge trimmer Adjust knife holder 1 screw 2 according to the requirement PFAFF 45 Adjustment 1 05 07 Knife position Requirement 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 PFAFF 574 und 591 Adjust knife 3 screw 4 according to the requirements Carry out a cutting test and repeat adjustment if necessary 46 PFAF ee Adjustment 1 06 Adjusting the thread trimmer 900 83 1 06 01 Resting position of the roller lever radial position of the control cam Requirement 1 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 2 When the take up lever is at t d c control cam 3 should just have placed roller lever 7 in its resting position Je
11. markings 10 and 11 are both on one side PFAFF 15 Adjustment 1 04 07 Needle position crosswise to sewing direction 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 Fig 1 07 EF Turn screws 1 screws 2 on both sides of the post according to the requirement 1 6 PFAF ee Adjustment 1 04 08 Needle position crosswise to sewing direction on the PFAFF 574 Requirement As seen crosswise to the sewing direction the needles must penetrate in the centre of their needle holes Ji D N Q Q OR SN e N ONA AN 129 063 Fig 1 08 A Shift bearing plate 1 screws 2 on both sides of the post according to the requirement 17 PFAFF Adjustment 1 04 09 Needle position crosswise to sewing direction on the PFAFF 591 Requirement As seen crosswise to the sewing direction the needle must penetrate in the centre of the needle hole ss lt aeeeo Fig 1 09 A Adjust feed wheel post 1 screws 2 3 and 4 a
12. taking care to see that the teeth of drive wheel 3 and feed wheel 4 lock into each other properly Tighten screws 1 Adjust guide 5 according to requirement 2 and tighten screws 2 20 PFAF ee Adjustment 1 04 12 Height of the feed wheel on the PFAFF 574 Requirement 1 When pressure is applied to the feed wheel 4 it should protrude from the needle plate by tooth height approx 0 8 mm 2 When no pressure is applied to the feed wheel 4 it should have a vertical play of ap prox 0 3 mm Fig 1 12 Swing out the roller presser EF Loosen screws 1 and 2 two screws each Adjust drive wheel 3 according to requirement 1 taking care to see that the teeth of drive wheel 3 and feed wheel 4 lock into each other properly Tighten screws 1 Adjust guide 5 according to requirement 2 and tighten screws 2 PFAFF 21 Adjustment 1 04 13 Height of the feed wheel on the PFAFF 591 Requirement The feed wheel should protrude from the needle plate by tooth height approx 0 8 mm Bo ESS Swing out the roller presser Fig 1 13 Loosen screws 1 Adjust eccentric 3 fastening screw accessible through hole 2 according to the require ment Tighten screws 1 22 PFAF ee Adjustment 1 04 14 Stitch length control eccentric Requi
13. 49 175 2243 102 Spare parts hotline 49 175 2243 103 Printed in Germany PFAFF Industriesysteme und Maschinen AG 2009 PFAFF is the exclusive trademark of VSM Group AB PFAFF Industriesysteme und Maschinen AG is an authorized licensee of the PFAFF trademark
14. 8 CONTENTS eee me ee eee eee ee nen Ta ann ne Ee ne Rent ae mene ene Page Knife stroke On Models 574 ANd 591 nirean A e edit Pens bade E N a aii 43 Cutting Strake OMmMOdel 57 1 reae oaee NE AA T AA N eos 44 Cutting s toke on models 5A md BT srein a E eE ETELE ESE 45 AEE AAAS TA A A E AIT A AA 46 Adjusting the thread trimmer 900 83 cccccccccccssceececsseeeeeeccsaeeeeeecaeeeeescsaeeeeesstaeeeee es 47 Resting position of the roller lever radial position of the Control CaM ssssscceccccsieeeen 47 Position of the thread catcher holdet conici cccecccccccsseeececseeeeeceesseseeeesessseeeesensesseeseestaaees 48 Position Of the thread cather ene eee r Aa OEA A E A AAA AATE EER A EAA ARAE 49 Knife position and Knife preSSUre iiss sccetsencsdedesbendhadaves haved set nates cvs evegeba AN EEN ES EAEEREN EEEE 50 Bobbin thread retaining SPiN geer nist have vee lesan ty echt genet at fame a A E EE 51 Man ualiCuttinG testis c5 Actes cent Beton Gee rales atin teen ea eden Agata teers 52 Releasing the tension ccccccccecceeeceecceccee ATE ET 53 Linkagesrod only tor the PEAFF s5 74 sscccseesiatenttoen cd teeaerddcecie vied leacd vue sttaidac O N 54 Adjustment of backtacking mechanism GII e nersesrrni atenei a a R E iS 55 Needle in needle hole only for PFAFF 571 and 591 cceecccceceesseeeeeesseeeeeesteeeesenessaees 55 Coupling for roller presser Orive eerie aien aN rere AAE AAEE EARE EEEo AE AKERAT EnA iS 56 Bevel gears for fe
15. 9 1 04 21 Synchronization of roller presser and feed Wheel eee cccccceccctececceeseeeeeeesseeeeeeesseeeeeeeses 30 1 04 22 Retainer only ON MOE 5A o cecccccccccccscessecscceseceeceseceaseaeecsessescsecsuecsaeceessseceecsaeeeeessecanenes 31 1 04 23 KGS EVE EE E A cites E A A A nada hou dece itn sececak 32 1 04 24 Needle thread tension release ccccececccecne cece eee eeee nna ie na deai Eaa ERRET 33 1 04 25 Thread check spring PFAFF 571 and 591 200 0 cece ceeccecee eee ce eee ceeeeeeeeeeaeeeeeeeeeeeeeeeeeeeseteaees 34 1 04 26 Thread echeck springs PFAFE 574 aici eret iae a E N Aaea Na Eia rare 35 1 04 27 Bobbin WINGS ienne a S E AT O Ga Been A eee 36 1 04 28 Pressure of roller presset aaa rra ear EE E Wn tees naa vee ATE ERRATEA 37 1 04 29 lia CARO Wisin Sn n a ince a A es Oe AA le tes to eR ht atl 38 1 04 30 RE ENGage Satety COUPIING aces era ri e baraated do E A A AENA 39 1 05 Adjusting the edge trimmer 725 04 as scott oe tase Maa coe UN a De ete eet lear 0 40 1 05 01 Position of the knife holder ON model 571 ureri nriran reeet NE aa N EEEE 40 1 05 02 Position of the knife holder on models 574 and 591 ccecceccccssssseceeceesseeeeesseseeeesenseeees 41 1 05 03 Knit strokedon model SZT ey atu nait n A E EE E R REETA 42 PFAFF 3 Index 1 05 04 1 05 05 1 05 06 1 05 07 1 06 1 06 01 1 06 02 1 06 03 1 06 04 1 06 05 1 06 06 1 06 07 1 06 08 1 07 1 0701 1 0702 1 0703 1 07 04 1 0705 1 0
16. PFAFF 571 5 4 ADJUSTMENT MANUAL 591 This Adjustment Manual is valid for machines from the following serial numbers onwards 6500120 gt 296 12 19 196 002 Justieranleitung engl 07 12 The reprinting copying or translation of PFAFF Service 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 GeigerStr 12 IG Nord D 67661 Kaiserslautern CONTENTS eich lea ss Aas dace Ads ce eae abi at ds da de i A cei Page 1 Adjustments aeae a eee Nea handel cts eet eden Teale ae 5 1 01 Tools gatiges and other acCeSsOnes sanre eee aie everett dole ied 5 1 02 Abbreviations ame ee ee eo A oO 6 1 03 Explanation ofthe symbol Smc nnenain a a a a A 6 1 04 Adjusting the basic Mmachihernersniyeisdd eraieeaeh heanin he eI KAO as 7 1 04 01 Needle position in sewing direction on the PFAFF 571 and 591 sssssssssssssisirrrirrrrrernn 7 1 04 02 Needle position in sewing direction on the PFAFF 574 sssssssssssississieseseesirrrrrrsrrnereeerrrne 8 1 04 03 Preliminary adjustment of the needle height ssesinnssenniisenniireertrirerettrrrtetrrrrrttrrnrerrrreet 9 1 04 04 Needle rise hook clearance needle height and needle guard on the PFAFF 571 10 1 04 05 Needle rise hook clearance needle height and needle guard on the PFAFF 574 12 1 04 06 Needle rise hook clearan
17. ad catcher 1 must be parallel to the surface of the thread catcher holder 4 EF Move thread catcher 1 screws 2 two screws in accordance with requirement 1 PFAFF 49 Adjustment 1 06 04 Knife position and knife pressure Requirement The knife pressure should be set as low as possible but the cutting operation should still be carried out reliably L BS i SSZ IT M Fig 1 41 129 020 EF Adjust eccentric 1 screw 2 in accordance with the requirement 50 PFAF ee Adjustment 1 06 05 Bobbin thread retaining spring 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 TUTTI 129 060 J Fig 1 42 129 021 EF 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 1st and 3rd stitches If necessary correct the tension PFAFF 51 Adjustment 1 06 06 Manual cutting test Requirement 1 When thread catcher 1 is on its forward stroke it must not carry bobbin thread 3 for ward too 2 When thread catcher 1 is in
18. ccording to the requirement 1 8 PFAF ee Adjustment 1 04 10 Height and stroke of the bobbin case opener Requirement 1 The top edges of the bobbin case opener 1 and bobbin case base 3 should be on one level 2 When the bobbin case opener 1 has deflected the bobbin case to its furthest point the catch of the bobbin case should be 0 3 0 5 mm from the back edge of the needle plate recess ST f S Op 9 129 064 Fig 1 10 wer Adjust bobbin case opener 1 screw 2 in accordance with requirement 1 Turn the balance wheel until the bobbin case opener has deflected the bobbin case to its furthest point 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 permitted PFAFF 19 Adjustment 1 04 11 Height of the feed wheel on the PFAFF 571 Requirement 1 When pressure is applied to the feed wheel 4 it should protrude from the needle plate by tooth height approx 0 8 mm 2 When no pressure is applied to the feed wheel 4 it should have a vertical play of ap prox 0 3 mm Swing out the roller presser EF Loosen screws 1 and 2 Adjust drive wheel 3 according to requirement 1
19. ce needle height and needle guard on the PFAFF 591 14 1 04 07 Needle position crosswise to sewing direction on the PFAFF 571 0 eeeeeeeceeteeeeees 16 1 04 08 Needle position crosswise to sewing direction on the PFAFF 574 ccc eeeeeteeeeeees 17 1 04 09 Needle position crosswise to sewing direction on the PFAFF 591 ceeeeeeeeeeeeeees 18 1 04 10 Height and stroke of the bobbin CASE OPENEL cccccceeesececceeeeeceeseeseeeecceeseeeeeeteeeeeesensaeees 19 1 04 11 Height of the feed wheel on the PFAFF 571 ccccccccccccceesseececsseeecescnesseeesenttsseeeseneaaees 20 1 04 12 Height of the feed wheel on the PFAFF 574 ccccccccscccccsseseeceeseeeeeeeeesseeeesetseseeeeeneaaees 21 1 04 13 Height of the feed wheel on the PFAFF 591 cceccceccccsesseeceesteseeeesessseeeesensteeeesensaaees 22 1 04 14 Stitch JEngth COMO ecc eni Cona kan renie a a A 23 1 04 15 Stitch l ength scaledis k a a a SES R a A 24 1 04 16 Shaft crank to feed wheel drive oo cece ccccccccecccceseceeceseceeecsesseecsseceesssecaesssecseesaecseesecseenes 25 1 04 17 Shaft crank te roller pressor GVE ao ane eigen temen E ais eaten 26 1 04 18 Clearance between roller presser and feed wheel cece ccccccccececceesseeeeeesesseeesesessseeeeeeeaes 27 1 04 19 PROMS TORE SSC piece Seed Meat kee apie te Sa a OO Od at ant files SOD at ahh Sh Rr ce UA 28 1 04 20 Stitch l6ngthion stitch length scale nencia a a 2
20. ed wheel drive sssss ssssriistttkitt ttti rittt tAn EEEE EEEEEEEEEEEEEEEEEEEEEE EEEE EE EErEE EE E 57 Bevel gear Play t a A e e a a a N a E a ai 58 Adjusting the MAGN SES izira anes pees enc tenets cencees teenies AE ETES rE 59 Parameter Seting Sacs erene aa urea ta a a A iE EA e E idee awe erent 60 Blockdiagra mM ieseni anin en eR ay ees ee a a a ei 61 PFAFF Adjustment 1 01 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 refitted properly after adjustment see Chapter 1 06 Danger warnings of the instruc If not otherwise stated the machine must be disconnected from the electrical tion manual power supply Danger of injury due to unintentional starting of the machine Notes on adjustment All following adjustments are based on a fully assembled machine and may only be carried out by expert staff trained for this purpose Machine covers which have to be removed and replaced to carry out checks and adjust ments are not mentioned in the text The order of the following chapters corresponds to the most logical work sequence for machines which have to be completely adjusted If only specific individual work steps are carried out both the preceding and following chapters must be observed Screws nuts indicated in brackets are fastenings for machine parts which must be loosened before adjustment
21. eedle should be positioned in the centre of the needle hole as seen in the direction of sewing Fig 1 02 yz Adjust needle bar screws 1 and 2 according to the requirement 8 PFAF ee Adjustment 1 04 03 Preliminary adjustment of the needle height 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 O 3 Fig 1 03 EF Adjust needle bar 1 screw 2 without turning it according to the requirement PFAFF Adjustment 1 04 04 Needle rise hook clearance needle height and needle guard on the PFAFF 571 Requirement With the needle bar positioned 2 4 mm after BDC and the stitch length set at 0 8 1 the hook point must be at needle centre with a hook to needle clearance of 0 05 to 0 1 mm 2 the top of the needle eye must be 0 8 to 1 0 mm below the hook point 3 the needle guard 6 must touch the needle lightly Fig 1 04 Set stitch length at 0 8 Loosen both screws 1 2 3 4 and 5 Bring needle bar to 2 4 mm past BDC 10 PFAF ee Adjustment Set hook point at needle cen
22. ement 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 lt S Ann T Fig 1 17 Set the maximum stitch length Twist clamp crank 1 screw 2 according to the requirement PFAFF Adjustment 1 04 18 Clearance between roller presser and feed wheel 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 Make sure that the roller presser is parallel to the feed wheel PFAFF 27 Adjustment 1 04 19 Roller presser Requirement When the roller presser 1 is touching the feed wheel 5 it must 1 be parallel to feed wheel 5 as seen in the direction of sewing 2 be in the centre of the needle on model 574 the left needle as seen in the direction of sewing 3 be as near as possible to the needle on model 574 the left needle as seen crosswise to the direction of sewing Fig 1 19 Raise the roller presser Always observe requirem
23. ent 1 for subsequent adjustments Adjust roller presser 1 screw 2 according to requirement 2 Lower roller presser 1 to rest on feed wheel 5 Adjust roller presser bracket 3 screw 4 according to requirement 3 wards the operator When sewing very tight curves the roller presser 1 must be moved a little to 28 PFAF Fisa Adjustment 1 04 20 Stitch length on stitch length scale Requirement 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 first to last needle penetration must be 30 mm PFAFF 571 PFAFF 591 Fig 1 20 PFAFF 574 Set stitch length 3 By turning the balance wheel let the needle enter 11 times and measure the total length Adjust clamp 1 screw 2 according to the requirement Clamp 1 must not be positioned diagonally to the rock shaft PFAFF 29 Adjustment 1 04 21 Synchronization of roller presser and feed wheel Requirement After 30 needle penetrations in a strip of leather the total length from the first to the last penetration should be the same both in the lower and the upper leather layer ag Fig 1 21 Set stitch length 3 By turning the balance wheel let the needle enter 30 times
24. hook the thread check springs 3 and 6 should rise slightly from supports 1 and 9 Fig 1 26 7 Adjust support 1 screw 2 according to requirement 1 To adjust the spring tension of thread check spring 3 turn screw 4 screw 5 To adjust the spring tension of thread check spring 6 turn bush 7 screw 8 Adjust support 9 screw 10 according to requirement 1 If the adjustment range is too low Support 9 can be screwed into another hole Adjust the thread regulator 11 screw 12 according to requirement 2 For technical reasons it may be necessary to deviate from the specified spring stroke or spring tension Move the thread regulator 11 screw 12 towards more thread or less thread PFAFF 35 Adjustment 1 04 27 Bobbin winder Requirement 1 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 2 The bobbin winder must switch itself off when the filled thread is about 1 mm from the edge of the bobbin O 121 081 Fig 1 27 Position drive wheel 1 screws 2 according to requirement 1 Position bolt 3 screw 4 according to requirement 2 36 PFAF ee Adjustment 1 04 28 Pressure of roller presser Requirement The material must be
25. its front position bobbin thread 3 must be held reliably by hook 4 3 After the trimming action both the needle thread and the bobbin thread must be perfectly cut and bobbin thread 3 retained TH amp Ley Fig 1 43 Sew a few stitches Turn off the on off switch Carry out the cutting operation manually Check requirement 1 and 2 and if necessary readjust thread catcher 1 in accordance with Chapter 1 06 03 Position of the thread catcher Check requirement 3 and if necessary readjust the bobbin thread retaining spring 2 in accordance with Chapter 1 06 05 Bobbin thread retaining spring 52 PFAF ee Adjustment 1 06 07 Releasing the tension Requirement When the magnet Is activated tension discs 3 must be at least 0 5 mm apart Fig 1 44 Activate the magnet Detach the tension bearing plate 1 and adjust pressure plate 2 in accordance with the re quirement It is possible to set the time for releasing the tension with the parameter functions see Chapter 1 08 Parameter settings PFAFF 53 Adjustment 1 06 08 Linkage rod 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 EF Adjust dr
26. ive levers 1 screws 2 in accordance with the requirement 54 PFAF ee Adjustment 1 07 Adjustment of backtacking mechanism 911 1 07 01 Needle in needle hole 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 JO QO ZN oe DD Fig 1 46 ZF Turn crank 1 screws 2 according to the requirement PFAFF 55 Adjustment 1 0702 Coupling for roller presser drive Requirement 1 When the roller foot is touching the feed wheel and the magnets are extended the top coupling half 1 should be touching the bottom coupling half 2 There must be a distance of 3 mm between coupling half 1 and locking disc 3 of the drive mechanism Fig 1 47 EF Adjust coupling half 1 screw 2 according to the requirement 56 PFAF ee Adjustment 1 07 03 Bevel gears for feed wheel drive Requirement 1 Bevel gear 3 must fit well on the left side 2 There must be a distance of 15 mm between bevel gear 3 and bevel gear 5
27. rement 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 Turn stitch length control device 1 screws 2 according to the requirement PFAFF 23 Adjustment 1 04 15 Stitch length scale disk Requirement When the stitch length control device is engaged and the stitch length is set at 07 the marking line on scale disk 1 should be positioned opposite the lower edge 3 of the guard belt opening Fig 1 15 Set stitch length 0 Turn stitch length control device 1 screws 2 according to the requirement 24 PFAF ee Adjustment 1 04 16 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 models 571 and 591 must be able to move freely when the balance wheel is turned PFAFF 571 PFAFF 591 an ep Fig 1 16 Set the maximum stitch length Twist or shift the shaft crank 1 screw 2 according to the requirement DR PFAFF 574 PFAFF 25 Adjustment 1 04 17 Shaft crank to roller presser drive Requir
28. retaining collar 10 touching bevel gear 11 tighten screws 2 With retaining collar 12 touching bevel gear 13 tighten screws 4 Tighten screws 7 on both sides of the post Adjust needle guard 9 screw 14 on both hooks according to rRquirement 3 When a hook is changed make sure that the markings 15 and 16 are both on one side PFAFF 13 Adjustment 1 04 06 Needle rise hook clearance needle height and needle guard on the PFAFF 591 Requirement With the needle bar positioned 2 4 mm after BDC 1 the hook point must be at needle centre with a hook to needle clearance of 0 05 to 0 1 mm 2 the top of the needle eye must be 0 8 to 1 0 mm below the hook point 3 the needle guard 6 must touch the needle lightly 129 051 Fig 1 06 Set stitch length at 0 8 Loosen screws 1 2 3 4and 5 Bring needle bar to 2 4 mm past BDC 14 PFAF ee Adjustment Set hook point at needle centre making sure that the needle is not deflected by needle guard 6 Adjust needle height according to Requirement 2 Adjust hook post according to Requirement 1 and tighten screws 4 Making sure that there is some play in the bevel gear tighten screws 2 With retaining collar 7 touching bevel gear 8 tighten screws 1 Screws 5 remain loosened for further adjustments Adjust needle guard 6 screw 9 according to Requirement 3 When the hook is changed make sure that the
29. t see arrow Adjust magnet frame 2 screws 3 in accordance with the requirements PFAFF Adjustment 1 08 Parameter settings Parameter settings are described in the separate operations manual for the drive and may only be changed by qualifi ed technicians 60 PFAF ee Version 04 02 08 Block diagram 2 Block diagram 2 01 PFAFF 570 590 with control unit P44 PD L VR1 VR3 FSL 570 590 LL 2 T Synchronizer PD3 6 only on the 574 cs g S3 BDF PICO TOP V S2 PFA SSS eas Cia J 2 ODO Labao o STOP VR2 75 46 rg pole 2 2 y 16 Drive Ministop long incremental transducer Speedcontrolunit for 3 software download X8 Control unit P44 PD L power switch ava amp Control package P44 PD L LS VR1 VR2 VR3 FSL PFA 900 STOP Light barrier Roller presser release Feed switch over VR3 magnet needle only on the 571 591 Thread tension release Automatic presser foot lift Thread trimmer Start inhibitor Mains plug l PFAFF 61 Block diagram
30. tre making sure that the needle is not deflected 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 With retaining collar 7 touching bevel gear 8 tighten screws 2 and 3 Adjust needle guard 6 screw 9 according to requirement 3 When the hook is changed make sure that the markings 10 and 11 are both on one side PFAFF 11 Adjustment 1 04 05 Needle rise hook clearance needle height and needle guard on the PFAFF 574 Requirement With the needle bar positioned 2 4 mm after BDC 1 the hook point must be at needle centre with a hook to needle clearance of 0 05 to 0 1 mm the top of the needle eye must be 0 8 to 1 0 mm below the hook point the needle guard 9 must touch the needle lightly wW N Fig 1 05 Loosen screws 1 2 3 4 5 6 and7 Loosen screws 8 slightly Bring needle bar to 2 4 mm past BDC 1 2 PFAF ee Adjustment Set both hook points at needle centre making sure that the needles are not deflected by needle guard 9 Adjust needle height according to Requirement 2 Adjust both hook posts according to Requirement 1 and tighten screws 8 Tighten screws 1 and 6 Making sure that there is some play in the bevel gear tighten screws 3 and 5 With
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