Pfaff 571 Instruction Manual Download Page 5

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Index

Contents ................................................................................. Chapter - Page

.04.19

Clearance between roller presser and feed wheel ...................................................... 11 - 23

.04.20

Roller presser .............................................................................................................. 11 - 24

.04.21

Stitch length on stitch length scale ............................................................................. 11 - 25

.04.22

Synchronization of roller presser and feed wheel ........................................................ 11 - 26

.04.23

Retainer (only on model 574) ...................................................................................... 11 - 27

.04.24

Knee lever ................................................................................................................... 11 - 28

.04.25

Needle thread tension release .................................................................................... 11 - 29

.04.26

Thread check spring (PFAFF 571 and 591) .................................................................. 11 - 30

.04.27

Thread check springs (PFAFF 574) .............................................................................. 11 - 31

.04.28

Bobbin winder ............................................................................................................. 11 - 32

.04.29

Pressure of roller presser ............................................................................................ 11 - 33

.04.30

Lubrication .................................................................................................................. 11 - 34

.04.31

Re-engage safety coupling .......................................................................................... 11 - 35

.05

Adjusting the edge trimmer -725/04 ........................................................................ 11 - 36

.05.01

Position knife holder on model 571 ............................................................................. 11 - 36

.05.02

Position knife holder on models 574 and 591 .............................................................. 11 - 37

.05.03

Knife stroke on model 571 .......................................................................................... 11 - 38

.05.04

Knife stroke on models 574 and 591 ........................................................................... 11 - 39

.05.05

Cutting stroke on model 571 ...................................................................................... 11 - 40

.05.06

Cutting stroke on models 574 and 591 ....................................................................... 11 - 41

.05.07

Knife position .............................................................................................................. 11 - 42

.06

Adjusting the thread trimmer -726/05 on model 591 ............................................. 11 - 43

.06.01

Position of the knife to the needle plate ...................................................................... 11 - 43

.06.02

Knife position crosswise to sewing direciton .............................................................. 11 - 44

.06.03

Knife height ................................................................................................................. 11 - 45

.06.04

Cutting stroke ............................................................................................................. 11 - 46

.06.05

Knife stroke ................................................................................................................. 11 - 47

.07

Adjusting the thread trimmer -900/81 ...................................................................... 11 - 48

.07.01

Resting position of the roller lever / radial position of the control cam ........................ 11 - 48

.07.02

Position of the thread catcher holder .......................................................................... 11 - 48

.07.03

Distance between thread catcher and needle plate .................................................... 11 - 49

.07.04

Position of the thread catcher ..................................................................................... 11 - 50

.07.05

Knife position and knife pressure ................................................................................ 11 - 51

.07.06

Bobbin thread retaining spring .................................................................................... 11 - 52

.07.07

Manual cutting test ..................................................................................................... 11 - 53

.07.08

Releasing the tension .................................................................................................. 11 - 54

.07.09

Linkage rod (only for the PFAFF 574) .......................................................................... 11 - 55

.08

Adjustment of backtacking mechanism -911/.. ........................................................ 11 - 56

.08.01

Needle in needle hole (only for PFAFF 571 and 591) ................................................... 11 - 56

.08.02

Coupling for roller presser drive .................................................................................. 11 - 57

.08.03

Bevel gears for feed wheel drive (on the PFAFF 571 and 574) .................................... 11 - 58

.08.04

Bevel gear play (on the PFAFF 571 and 574) ............................................................... 11 - 59

.08.05

Bevel gears for feed wheel drive (on the PFAFF 591) ................................................. 11 - 60

.08.06

Bevel gear play (on the PFAFF 591) ............................................................................ 11 - 61

.09

Parameter settings .................................................................................................... 11 - 62

Wearing parts ..............................................................................................................

12 - 1

Circuit diagrams ..........................................................................................................

13 - 1

Summary of Contents for 571

Page 1: ...Instruction Manual 296 12 18 461 002 Betriebsanleitung engl 01 03 591 This instruction manual applies to machines from the following serial numbers onwards PFAFF 571 2574794 PFAFF 574 2574796 PFAFF 591 2574800 ...

Page 2: ...r translation of PFAFF instruction manuals whether in whole or in part is not permitted without our prior permission and not without written indication of the source PFAFF Industrie Maschinen AG Postfach 3020 D 67653 Kaiserslautern Königstr 154 D 67655 Kaiserslautern Editing illustrations Verlag TD D 77901 Lahr ...

Page 3: ... counting 7 2 7 04 Pedal 7 2 7 05 Lever for lifting roller presser 7 3 7 06 Knee lever 7 3 7 07 Key for setting stitch length 7 4 7 08 Swing out roller presser 7 4 7 09 Edge trimmer 725 04 for 571 7 5 7 10 Edge trimmer 725 04 for 574 and 591 7 6 7 11 Edge trimmer 726 05 for 591 7 7 8 Installation and commissioning 8 1 8 01 Installation 8 1 8 01 01 Adjusting the table height 8 1 8 01 02 Fitting the...

Page 4: ...of the air filter lubricator 10 6 11 Adjustment 11 1 11 01 Notes on adjustment 11 1 11 02 Tools gauges and other accessories 11 1 11 03 Abbreviations 11 1 11 04 Adjusting the basic machine 11 2 11 04 01 Adjusting the synchronizer does not apply to machines with flange motor 11 2 11 04 02 Needle position in sewing direction on the PFAFF 571 and 591 11 3 11 04 03 Needle position in sewing direction ...

Page 5: ...591 11 43 11 06 01 Position of the knife to the needle plate 11 43 11 06 02 Knife position crosswise to sewing direciton 11 44 11 06 03 Knife height 11 45 11 06 04 Cutting stroke 11 46 11 06 05 Knife stroke 11 47 11 07 Adjusting the thread trimmer 900 81 11 48 11 07 01 Resting position of the roller lever radial position of the control cam 11 48 11 07 02 Position of the thread catcher holder 11 48...

Page 6: ...ing sewing tools e g needle roller presser needle plate or bobbin when threading the machine when leaving the machine unattended and during maintenance work the machine is to be separated from the power supply by switching off the On Off switch or by removing the plug from the mains Everyday maintenance work is only to be carried out by appropriately trained personnel Repairs and special maintenan...

Page 7: ...onnel is to be instructed as to the safety equipment of the machine and regarding safe work methods It is the duty of the user to only operate the machine in perfect running order It is the obligation of the user to ensure that none of the safety mechanisms are removed or deactivated It is the obligation of the user to ensure that only authorized persons operate and work on the machine Further inf...

Page 8: ...lways immediately report to the person responsible any changes in the machine which may limit its safety 1 05 02 Specialist personnel Specialist personnel are persons with a specialist education in the fields of electrics electronics and mechanics They are responsible for the lubrication maintenance repair and adjustment of the machine The specialist personnel is obliged to observe the following p...

Page 9: ... without belt guard 4 and 5 Danger of injury by rotating drive belt Do not operate the machine without tilt lock 6 Danger of crushing between sewing head and table top 1 06 Danger A working area of 1 meter is to be kept free both in front of and behind the machine while it is in operation so that it is always easily accessible Never reach into the sewing area while sewing Danger of injury by the n...

Page 10: ... post bed sewing machine post to the right of the needle with driven feed wheel and roller presser and synchronized needle The machines are used for sewing lockstitch seams in the leather and upholstery industries Any use of these machines which is not approved by the manufacturer shall be considered as improper use The manufacturer shall not be liable for any dam age arising out of improper use P...

Page 11: ... 2 5 mm Cutting speed for 725 and 726 2800 cuts min Connection data Operating voltage 230 V 10 50 60 Hz Max power consumption 1 2 kVA Fuse protection 1 x 16 A inert Noise data Emission sound level at the workplace at appropriate speed Noise measurement in accordance with DIN 45 635 48 A 1 ISO 11204 ISO 3744 ISO 4871 PFAFF 571 and 591 model A B at a speed of 2400 spm LpA 79 dB A PFAFF 574 model C a...

Page 12: ...ightweight materials PFAFF 571 591 Model B For sewing medium weight materials PFAFF 574 591 Model C For sewing medium heavy materials Additional equipment Subclass 725 04 Edge trimmer Subclass 726 05 Edge trimmer Subclass 900 81 Thread trimmer Subclass 910 15 Automatic presser foot lifter Subclass 911 35 Bartacker Subclass 940 02 Needle plate rounded in sewing direction Needle system for PFAFF 574...

Page 13: ...nd various plastic mat erials The electrical equipment comprises plastic materials and copper The machine is to be disposed of according to the locally valid pollution control regula tions if necessary a specialist ist to be commissioned Care must be taken that parts soiled with lubricants are disposed of separately according to the locally valid pollution control regulations ...

Page 14: ...tomer s premises nor to other operating locations It must be ensured that the machines are only transported in an upright position 5 03 Disposal of packing materials The packing materials of this machine comprise paper cardboard and VCE fibre Proper dis posal of the packing material is the responsibility of the customer 5 04 Storage If the machine is not in use it can be stored as it is for a peri...

Page 15: ...nstruction manual work to be carried out or important information is accentuated by symbols These symbols have the following meanings Note information Cleaning care Lubrication Maintenance repairs adjustment service work only to be carried out by technical staff ...

Page 16: ...pressed during sewing the machine sews in reverse Keys 2 can be used for parameter settings see Chapter 11 09 Parameter settings 7 Controls 7 01 On off switch Turn the machine on and off by turning switch 1 and pressing switch 2 On machines without edge trimming device 725 or 726 there is no switch 1 Fig 7 01 2 1 ...

Page 17: ...es with 911 About 100 stitches before reaching the preset number of stitches LED 1 flashes After the thread has been trimmed and the bobbin changed the stitch counting begins anew Presetting the number of stitches see Chapter 9 09 Set ting the stitch counting function for bobbin thread monitoring 7 04 Pedal 0 Neutral position 1 Sewing 2 Raise roller presser on machines with 910 3 Trim sewing threa...

Page 18: ... 006 7 05 Lever for lifting roller presser The roller presser can be raised by turning lever 1 Fig 7 05 1 7 06 Knee lever The roller presser can be raised by pressing the knee lever 1 in the direction of the arrow 1 Fig 7 06 ...

Page 19: ...ngth Fig 7 07 The stitch length is set by pressing key 1 and turning the balance wheel see Chapter 9 08 Setting the stitch length 7 08 Swing out roller presser When the roller presser is raised it can be swung out by pulling it lightly downwards Fig 7 08 1 1 ...

Page 20: ...dge guide 2 moves into its operating position Switch off edge guide Raise edge guide 2 and let it click into position The edge guide 2 is out of operation Raise lever 4 The edge guide swings backwards Changing the knife The following work may only be carried out by technical staff or by persons who have been properly instructed Switch off the machine Loosen screw 5 and remove knife 6 Insert new kn...

Page 21: ...oves into its operating position Switch off edge guide Raise edge guide 2 and let it click into position The edge guide 2 is out of operation Raise lever 4 The edge guide swings backwards Changing the knife The following work may only be carried out by technical staff or by persons who have been properly instructed Switch off the machine Loosen screw 5 and remove knife 6 Insert new knife and push ...

Page 22: ...pressed the edge guide moves into its starting position Switch off edge guide By raising lever 5 the edge guide is put out of operation Changing the knife The following work may only be carried out by technical staff or by persons who have been properly instructed Switch off the machine Loosen screw 6 and remove knife 7 Insert new knife and push it close to needle plate insert Tighten screw 6 Adju...

Page 23: ...rm and steady also during sewing 8 01 Installation The site where the machine is installed must be provided with suitable connections for elec tric current It must be ensured that the standing surface of the machine site is firm and horizontal and that sufficient lighting is provided for For packing and transportation reasons the table top is in the lowered position The table height is adjusted as...

Page 24: ...k 1 provided in the accessories using screw 2 Do not operate the machine without tilt lock 1 Danger of crushing between sewing head and table top 8 01 02 Fitting the tilt lock Fig 8 02 1 2 8 01 03 Adjusting the V belt tension does not apply to machines with flange motor Loosen the nuts 1 Set tension of v belt using motor bracket 2 Tighten nuts 1 Fig 8 03 1 2 cm 2 ...

Page 25: ...uard sections 2 and 3 with screws 4 Slide the slots of the bottom part 5 of the belt guard behind the heads of screws 6 Attach with screws 7 and then tighten screws 6 through the boreholes Fig 8 05 8 01 05 Mounting the lower V belt guard does not apply to machines with flange motor Adjust the v belt guard 1 so that the motor pulley and v belt run freely Tighten screws 2 Fig 8 05 shows a Quick moto...

Page 26: ...osition stop 2 is located in the groove of synchronizer 1 see arrow Slightly tighten screws 3 Insert synchronizer plug into the coupling socket of the control box Adjust synchronizer 1 see Chapter 11 04 01 Adjusting the synchronizer Fig 8 06 3 1 2 8 01 07 Fitting the reel stand Fit the reel stand as shown in Fig 8 07 Afterwards insert the stand in the hole in the table top and secure it with the n...

Page 27: ...he wedge from motor shaft 4 Attach angle bracket 5 with screws 6 Fit toothed belt wheel 7 to the motor shaft 4 so that the point of the screw is located in the groove of the motor shaft Screw threaded stud 8 into the bearing plate 1 4 5 8 3 6 7 61 107 8 02 02 Mounting the flange motor to the machine Attach bearing plate 1 of motor 2 to the machine case with screws 3 only tighten screws 3 slightly ...

Page 28: ... 02 03 Mounting the toothed belt and adjusting the tension Bring the take up lever to b d c Turn toothed belt wheel 1 until screw 2 is located in the position shown in Fig 8 10 In this position fit toothed belt 3 Swing the bearing plate 4 of the motor so that the toothed belt is tensioned In this position tighten screws 5 Fig 8 10 2 1 3 5 5 4 ...

Page 29: ...afety switch prevents the machine starting when the main switch is on To deactivate the safety switch the main switch must be switched off and then on again after the machine has been brought to an upright position 61 113 Fig 8 12 1 2 58 011 8 03 Connecting the earth cable Screw the earth cable from the sewing head motor main switch and work aids to the stand Fig 8 13 ...

Page 30: ...he needle plate Select parameter 700 and adjust it according to the motor service manual 61 086 8 05 Tilted work base R 5 R 5 R 5 R 5 R 5 R5 R 10 R5 33 45 20 2 113 3 0 1 339 6 0 3 340 0 2 2x Dübel ø12x37 20 0 1 49 8 0 2 49 8 0 2 32 48 18 28 2 18 8 Ø5 11 8 1 5 15 23 21 Ø13 2x Ø8 5 2x 494 R21 0 5 Ø12 2x 20 200 A X X A A A 2x dowel pins Ø 12 x 37 ...

Page 31: ...Installation and commissioning 8 9 8 06 Table top cutout Stand position Part no 906 3750 000 Screwed insert DIN 7965 2x Part no 12 177 106 05 ...

Page 32: ... any discrepancies the machine must not be operated under any circumstances The machine may only be connected to an earthed socket When the machine is running the balance wheel must turn towards the operator If it does not have the motor connection changed by a mechanic Machines with pneumatic equipment must be connected to the compressed air supply The pressure gauge should indicate a pressure of...

Page 33: ...lug from the electric power socket 9 01 Inserting the needle on model 571 and 591 Switch the machine off Danger of injury if the machine is started accidentally Only use needles of system 134 Raise the roller presser 1 and swing it out Loosen screw 2 and insert the needle as far as possible The long groove must face to the right on model 571 and to the left on model 591 Tighten screw 2 and swing r...

Page 34: ...oller presser 1 and swing it out Loosen screws 2 and insert the needles so that the long groove of the left needle is facing right and that of the right needle is facing left Tighten screws 2 and swing roller presser 1 back into position The choice of needle depends on the model of the machine and the thread and material used see Chapter 3 02 Needles and threads Fig 9 02 1 2 2 ...

Page 35: ...me time pressing bobbin winder spindle 2 and lever 3 The bobbin is filled up during sewing The thread tension on bobbin 1 can be adjusted using knurled screw 4 The bobbin winder stops automatically when bobbin 1 is full If the thread is wound unevenly Loosen nut 5 Turn thread guide 6 accordingly Tighten nut 5 2 1 4 _ Fig 9 03 5 6 3 9 03 Winding the bobbin thread adjusting the primary thread tensio...

Page 36: ...ension by turning screw 3 When the thread is pulled the bobbin must rotate in the direction of the arrow 2 3 1 5 c m Fig 9 05 1 2 Switch the machine off Danger of injury if the machine is started accidentally Removing the bobbin case Open the post cap Raise latch 1 and remove bobbin case 2 Inserting the bobbin case Insert bobbin case 2 Close the latch and close the post cap 574 is shown in Fig 9 0...

Page 37: ...ine off Danger of injury if the machine is started accidentally Tilt up the eye guard 1 Thread the needle thread as shown in Fig 9 06 On model 571 the needle is threaded from the right to the left and on model 591 from the left to the right Adjust the needle thread tension by turning milled screw 2 1 2 Fig 9 06 ...

Page 38: ... off Danger of injury if the machine is started accidentally Tilt up the eye guard 1 Thread both needle threads as shown in Fig 9 07 The left needle is threaded from the right to the left and the right needle from the left to the right Adjust the needle thread tensions by turning milled screws 2 Fig 9 07 2 ...

Page 39: ...ch length Press key 1 and at the same time turn the balance wheel until the stitch setter clicks into position Hold down key 1 and turn the balance wheel to and fro until the stitch length required is shown on the scale 2 opposite the bottom edge 3 of the belt guard recess ...

Page 40: ... 4000 stitches Switch on the machine Press the Parameter input key LED on 111 9 09 Setting the stitch counting function for bobbin thread monitoring By pressing on key P select the parameter group 760 04000 760 20 Save the input by terminating the parameter input LED off On machines without a control panel the same parameter can be entered on the display screen of the motor see motor service manua...

Page 41: ... the bobbin Unscrew hook gib 1 Turn the handwheel until the point of bobbin case 2 penetrates into the groove of the hook race approx 5 mm Remove bobbin case 2 Clean the hook race with paraffin When inserting the bobbin case 2 ensure that the horn of the bobbin case 2 engages in the groove of the needle plate Screw hook gib 1 back on and close the post cap 10 Care and maintenance Clean daily more ...

Page 42: ...ine and after long periods out of operation pour a few drops of oil into the hook race see arrow Fig 10 02 10 03 Oil bowl for hook lubrication Check the oil level before each use There must always be oil in reservoir 1 If required refill oil through hole Fig 10 03 1 Use only oil with a mean viscosity of 22 0 mm2 s at 40 C and a density of 0 865 g cm3 at 15 C We recommend PFAFF sewing machine oil B...

Page 43: ... to mark through hole We recommend PFAFF thread lubricating oil Order No 280 1 120 217 Fig 10 04 1 10 05 Oiling the edge trimmer 726 05 All moving parts and bearings marked with arrows in Fig 10 05 are to be supplied with oil twice a week Use only oil with a mean viscosity of 22 0 mm2 s at 40 C and a density of 0 865 g cm3 at 15 C We recommend PFAFF sewing machine oil Best Nr 280 1 120 144 Fig 10 ...

Page 44: ...el gears of the 574 Apply grease to all the tooth flanks and the rack see arrows To set the sewing head upright press tilt lock 1 backwards and set the sewing head upright using both hands Use both hands to set the sewing head upright Danger of crushing between the sewing head and the table top We recommend PFAFF sodium grease with a dripping point of approx 150C Order No 280 1 120 243 Fig 10 06 1...

Page 45: ... 07 10 07 Checking adjusting the air pressure Before operating the machine always check the air pressure on gauge1 Gauge 1 must show a pressure of 6 bar If necessary adjust to this reading To do so pull knob 2 upwards and turn it so that the gauge shows a pressure of 6 bar 2 1 ...

Page 46: ...n water bowl 1 Water bowl 1 drains itself automatically when the compressed air hose is discon nected from the air filter lubricator Cleaning filter 2 Unscrew water bowl 1 Take out filter 2 Clean filter 2 with compressed air or iso propyl alcohol part No 95 665 735 91 Screw in filter 2 and screw on water bowl 1 Fig 10 08 10 12 0 6 4 2 8 16 14 100 50 150 0 200 230 1 2 ...

Page 47: ...th the preceding and following chapters must be observed Screws nuts indicated in brackets are fastenings for machine parts which must be loosened before adjustment and tightened again afterwards The machine must be switched off for all adjustment work Danger of injury if the machine is started accidentally 11 02 Tools gauges and other accessories 1 set of screwdrivers with blade widths from 2 to ...

Page 48: ...ines with flange motor Requirement 1 If sewing is interrupted the machine must position 5 mm before b d c of the needle bar 2 After pedal reverse the machine must position at t d c take up lever Fig 11 01 Carry out adjustments according to the motor instruction manual See also Chapter 11 09 Parameter settings ...

Page 49: ...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 Fig 11 02 Set the minimum stitch length Adjust needle bar screw 1 according to the requirement 1 ...

Page 50: ...ition in sewing direction 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 11 03 Adjust needle bar screws 1 and 2 according to the requirement 1 61 077 2 ...

Page 51: ...ment of the needle height Requirement When the needle bar is at TDC there must be a clearance of approx 22 mm between the needle point and the needle plate Fig 11 04 Adjust needle bar 1 screw 2 without turning it according to the requirement 22 mm 1 2 ...

Page 52: ...ok 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 5 Set stitch length at 0 8 Loosen both screws 1 2 3 4 and 5 Bring needle bar to 1 8 mm past BDC Set hook point at needle centre making sure that the needle is not deflected by needle guard 6 Adjust needle height according to Requirement ...

Page 53: ...h on one side 10 11 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 ...

Page 54: ...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 points 3 the needle guard 9 must touch the needle lightly Loosen screws 1 2 3 4 5 6 and 7 Loosen screws 8 slightly Bring needle bar to 2 0 mm past BDC Set both hook points at needle centre making sure that the needles are not deflected by needle guard 9 Fig 11 06 7 7 8 8 61 105 14 9 0 8 1 mm 61 0...

Page 55: ...g 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 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 requirement 3 ...

Page 56: ...ance 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 Set stitch length at 0 8 Loosen screws 1 2 3 4 and 5 Move needle bar into version corresponding position see table Set hook point at needle centre making sure that the needle is not deflected by needle guard 6 Adjust needle height according to Requirement...

Page 57: ...crews 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 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 ...

Page 58: ...n the PFAFF 571 Requirement When the stitch length is set at its maximum the needle must be positioned in the centre of the needle hole when entering and coming out of the needle plate Turn screws 1 screws 2 on both sides of the post according to the requirement Fig 11 08 2 2 1 2 2 ...

Page 59: ...e 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 Shift bearing plate 1 screws 2 on both sides of the post according to the requirement Fig 11 09 2 2 ...

Page 60: ...sswise 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 Fig 11 10 Adjust feed wheel post 1 screws 2 3 and 4 according to the requirement 1 2 2 4 4 4 4 3 ...

Page 61: ...should be 0 3 0 5 mm from the back edge of the needle plate recess Fig 11 11 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 o...

Page 62: ...n no pressure is applied to the feed wheel 4 it should have a vertical play of approx 0 3 mm Fig 11 12 Swing out the roller presser Loosen screws 1 and 2 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 2 3 0 8 mm 0 3 mm 5 ...

Page 63: ...pressure is applied to the feed wheel 4 it should have a vertical play of approx 0 3 mm Fig 11 13 Swing out the roller presser 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 3 0 8 mm ...

Page 64: ...Requirement The feed wheel should protrude from the needle plate by tooth height approx 0 8 mm 1 2 3 Swing out the roller presser Loosen screws 1 Adjust eccentric 3 fastening screw accessible through hole 2 according to the requirement Tighten screws 1 Fig 11 14 61 039 0 8 mm ...

Page 65: ...ent 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 2 Set the maximum stitch length Turn stitch length control device 1 screws 2 according to the requirement Fig 11 15 1 3 ...

Page 66: ...ol device is locked in position and the maximum stitch length is set the marking line of the highest number on the scale disk 1 must be opposite the lower edge 3 of the belt guard recess 3 Set the maximum stitch length Turn the scale disk 1 screws 2 according to the requirement 1 61 038 2 Fig 11 16 ...

Page 67: ...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 Set the maximum stitch length Twist or shift the shaft crank 1 screw 2 according to the requirement Fig 11 17 PFAFF 571 PFAFF 591 PFAFF 574 2 1 2 1 3 3 4 ...

Page 68: ...nt 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 Set the maximum stitch length Twist clamp crank 1 screw 2 according to the requirement Fig 11 18 2 1 3 4 ...

Page 69: ...ment When the presser bar lifter is raised the clearance between the roller presser and the feed wheel must be 7 mm 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 Fig 11 19 7 mm 1 2 ...

Page 70: ...3 be as near as possible to the needle on model 574 the left needle as seen crosswise to the direction of sewing 4 Raise the roller presser Always observe requirement 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 When sewing very tight curves t...

Page 71: ...ather 11 times the total length from the first to last needle penetration must be 30 mm 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 Fig 11 21 PFAFF 571 PFAFF 591 PFAFF 574 1 1 2 2 2 ...

Page 72: ...first to the last penetration should be the same both in the lower and the upper leather layer Set stitch length 3 By turning the balance wheel let the needle enter 30 times 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 Fig 11 22 2 1 ...

Page 73: ... 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 workpiece must be 0 2 0 3 mm Adjust retainer 1 screw 2 according to requirement 3 Adjust bracket 3 screw 4 according to requirement 1 and 2 Fig 11 23 1 2 3 4 ...

Page 74: ...hen 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 4 6 2 5 7 5 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 Fig 11 24 1 3 ...

Page 75: ... the presser bar lifter is raised 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 Align tension mounting plate 1 and pressure plate 2 according to the requirement Fig 11 25 61 043 1 2 3 0 5 mm ...

Page 76: ... passed around the hook the thread check spring 7 should rise slightly from its support _ 2 7 m m 7 1 6 5 3 Fig 11 26 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 th...

Page 77: ...ording 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 ...

Page 78: ...ly 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 2 1 5 Fig 11 28 Position drive wheel 1 screws 2 according to requirement 1 Position bolt 3 screw 4 according to requirement 2 1 mm 4 3 ...

Page 79: ...04 29 Pressure of roller presser Requirement The material must be fed smoothly No pressure marks should be visible on the material Fig 11 29 Adjust roller presser pressure with screw 1 according to the requirement 61 048 1 ...

Page 80: ...k whether oil has been filled in and that there is no air in the oil lines Let the machine run for 2 3 min While the machine is running do not place hands in the needle or hook area Danger of injury from moving parts With the machine running hold a strip of paper on the hook and check the requirement If necessary adjust the oil flow on screw 1 Fig 11 30 61 110 1 ...

Page 81: ...acturer 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 Remove jammed thread Hold coupling 1 with screw 2 and turn the balance wheel until you feel coupling 1 snap back into place again Fig 11 31 2 1 ...

Page 82: ...he adjusting wheel has been turned to its highest 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 Turn the adjusting wheel 1 to its highest position and engage edge trimmer Adjust knife holder 2 screw 3 according to the requirements Fig 11 32 61 050 1 2 3 61 051 ...

Page 83: ... edge of the needle plate Fig 11 33 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 4 3 1 2 ...

Page 84: ...o that the marking of the desired cutting stroke is opposite the marking on clamp collar 3 11 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 1 2 3 ...

Page 85: ...ke 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 1 3 2 Fig 11 35 Adjust crank 1 nut 2 in slotted lever 3 according to the requirement ...

Page 86: ...mer 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 turned by hand Switch off the machine and engage the edge trimmer Adjust knife 1 screw 2 according to the requirement Fig 11 36 1 2 1 ...

Page 87: ... 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 turned by hand 1 2 3 Fig 11 37 Switch off the machine and engage the edge trimmer Adjust knife holder 1 screw 2 according to the requirement ...

Page 88: ...dle plate insert but no whistling sound should occur during trimming 571 Adjust screw 1 screw 2 according to the requirements Carry out a cutting test and repeat adjustment if necessary 574 and 591 Adjust knife 3 screw 4 according to the requirements Carry out a cutting test and repeat adjustment if necessary Fig 11 38 1 2 61 055 4 3 ...

Page 89: ... Fig 11 39 Switch off the machine and engage the edge trimmer Loosen screw 1 and push back knife 2 slightly Turn milled screw 3 until its top edge is flush with the top edge of the cylindrical guide 4 Loosen screw 5 position guide 6 in the centre of guide 7 and slightly tighten screw 5 Adjust knife holder 8 according to the requirement and tighten screw 5 Screw 1 remains loosened for further adjus...

Page 90: ...rtical and rest lightly on the needle plate insert Fig 11 40 Switch off the machine and engage the edge trimmer Bring the knife into a vertical postion by turning milled screw 1 Bring knife 2 into light contact with the needle plate insert and tighten screw 3 The cutting pressure can be adapted to the material used with milled screw 1 1 3 2 ...

Page 91: ...centre of the angular knife opening must be at the same height as the upper edge of the needle plate 1 Fig 11 41 Switch off the machine and engage the edge trimmer Adjust milled screw 1 according to the requirement The basic setting may be changed depending on the material thickness 61 056 ...

Page 92: ... 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 turned by hand Fig 11 42 Switch off the machine and engage the edge trimmer Adjust knife holder 1 screw 2 according to the requirement 1 2 3 ...

Page 93: ...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 11 43 Turn eccentric 1 screws 2 on the back of the sewing head so that the marking of the desired cutting stroke is opposite marking 3 2 1 3 ...

Page 94: ... 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 Fig 11 44 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 requir...

Page 95: ... neutral position and the foremost position of the catcher the distance between the toothed segment 4 and the outer edge of the thread catcher holder 1 should be the same see arrow 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 Fig 11 45 3 5 4 1 2 2 1 4 4 1 ...

Page 96: ...eedle plate Requirement During its swivel movement thread catcher 1 should not pass the edge of the needle plate see arrow Fig 11 46 Move thread catcher 1 screws 2 two screws parallel to the thread catcher holder in accordance with the requirement 1 2 61 100 1 61 064 2 1 ...

Page 97: ...the bobbin case 3 2 When the thread trimmer is in its resting position the back edge of the thread catcher should be approx 2 5 3 mm behind the edge of the knife Move or turn thread catcher 1 screws 2 two screws in accordance with the requirements Thread catcher 1 must be parallel to the surface of the thread catcher holder 4 61 093 2 Fig 11 47 1 3 0 1mm 2 5 3 mm 1 4 3 ...

Page 98: ...ment 1 The knife 1 should be touching the needle plate 2 The knife pressure should be set as low as possible but the cutting operation should still be carried out reliably Fig 11 48 Move knife 1 screws 2 in accordance with requirement 1 or swivel it in accordance with requirement 2 2 ...

Page 99: ...ance with requirement 1 Adjust the tension in accordance with requirement 2 by bending side 4 of the bobbin thread clamp spring 1 Control requirement 1 Switch off the machine and bring the take up lever to its b d c Engage and disengage the thread catcher 3 by hand and check requirement 1 Adjust if necessary Control requirement 2 After the thread has been cut sew a few stitches by turning the bala...

Page 100: ... needle thread and the bobbin thread must be perfectly cut and bobbin thread 3 retained 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 11 07 04 Position of the thread catcher Check requirement 3 and if necessary readjust the bobbin thread retaining spring 2 in acc...

Page 101: ... 3 must be at least 0 5 mm apart Fig 13 51 Activate the magnet Detach the tension bearing plate 1 and adjust pressure plate 2 in accordance with the requirement It is possible to set the time for releasing the tension with the parameter functions see Chapter 11 10 Parameter settings 61 043 1 2 3 0 5 mm ...

Page 102: ...07 09 Linkage rod only for the PFAFF 574 Requirement When the thread trimmer is in its resting position the drive levers 1 must be parallel Adjust drive levers 1 screws 2 in accordance with the requirement Fig 11 52 1 1 2 ...

Page 103: ...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 Fig 11 53 Turn crank 1 screws 2 according to the requirement 1 2 X X ...

Page 104: ... Coupling for roller presser drive Requirement There must be a distance of 3 mm between coupling half 1 and locking disc 3 of the drive mechanism Fig 11 54 Adjust coupling half 1 screw 2 according to the requirement 1 2 3 mm 3 ...

Page 105: ...ts 1 Bevel gear 3 must fit well on the left side 2 There must be a distance of 14 mm between bevel gear 3 and bevel gear 5 Remove control unit 1 screws 2 Adjust bevel gear 3 screws 4 according to requirement 1 Adjust bevel gear 5 screws 6 according to requirement 2 2 2 1 Fig 11 55 3 6 5 4 14 mm ...

Page 106: ...2 When sewing backwards there must be a slight play between bevel gears 6 and 8 Disconnect air supply of the air filter lubricator Move unit 1 by hand as far as possible to the right Adjust bracket 2 screws 3 according to requirement 1 Move unit 1 by hand as far as possible to the left Adjust screw 4 nut 5 according to requirement 2 3 1 Fig 11 56 6 8 7 2 4 5 ...

Page 107: ...s 1 The right side of bevel gear 1 must be flush with its drive shaft see arrow 2 There must be a distance of 13 mm between bevel gear 3 and bevel gear 1 Fig 11 57 Adjust bevel gear 1 screws 2 according to requirement 1 Adjust bevel gear 3 screws 4 according to requirement 2 13 mm 3 2 2 1 ...

Page 108: ...ng backwards there must be a slight play between bevel gears 6 and 8 Fig 11 58 Disconnect air supply of the air filter lubricator Move unit 1 by hand as far as possible to the right see arrow Adjust screw 2 nut 3 according to requirement 1 Move unit 1 by hand as far as possible to the left see arrow Adjust screw 4 nut 5 according to requirement 2 2 3 1 4 5 61 062 7 6 8 ...

Page 109: ...th l balance wheel II Synchronizer setting with and keys 702 Needle position 1 needle lowered 0 127 40 703 Needle position 2 0 127 117 take up lever raised 705 Needle position 5 0 127 90 end cutting signal 1 707 Needle position 9 0 127 100 Start thread tension release 11 09 Parameter settings Following parameters can be set on the control panel using the display For more displays and information s...

Page 110: ...al 91 175 776 93 001 Roller presser with 25 mm dia 4 0 mm wide toothed 91 119 478 93 001 Roller presser with 25 mm dia 2 6 mm wide toothed 91 175 108 90 Roller presser with 25 mm dia 2 6 mm wide smooth PFAFF 571 574 591 PFAFF 574 91 176 329 05 91 176 321 05 11 178 172 15 91 118 308 05 PFAFF 571 591 System 134 PFAFF 574 System 134 35 11 210 043 15 91 119 491 05 13 033 148 05 11 330 082 15 2x 91 165...

Page 111: ...sub class 900 81 571 725 04 91 119 202 04 001 11 173 168 15 574 725 04 591 725 04 91 011 165 04 001 11 130 167 15 591 726 05 91 011 324 04 003 91 175 180 15 11 130 092 15 2x 12 315 080 15 2x 91 263 139 05 11 108 846 15 2x 91 263 348 05 11 108 093 15 2x 91 263 294 05 ...

Page 112: ...r M10 Knife motor Q1 On off switch T10 Transformer knife motor Outputs Y1 900 thread trimmer Y4 910 automatic presser foot lift Y5 911 backtacking mechanism Y10 Thread tension Inputs S1 Pedal set value transmitter S10 Key knife motor S11 Key backtacking by hand S12 Key single stitch S13 Key needle position change S14 Key start inhibitor Reference list for the circuit diagrams ...

Page 113: ...13 2 91 191 443 95 Part1 Version 20 04 01 General plan circuit diagrams ...

Page 114: ...13 3 General plan circuit diagrams Version 20 04 01 91 191 443 95 Part 2 ...

Page 115: ...Notes ...

Page 116: ...en AG Postfach 3020 D 67653 Kaiserslautern Königstr 154 D 67655 Kaiserslautern Telefon 0631 200 0 Telefax 0631 17202 E Mail info pfaff industrial com Gedruckt in der BRD Printed in Germany Imprimé en R F A Impreso en la R F A ...

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Pfaff 571, Instruction Manual

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