Pfaff 1571 Instruction Manual
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Pfaff 1571 Instruction Manual

Pfaff 1571 Instruction Manual

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Enlarged version
1571
1574

Instruction Manual

1591
This instruction manual applies to machines from the
following serial numbers onwards:
# 2575633
296-12-18 573/002
Betriebsanleitung engl. 04.02

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Summary of Contents for Pfaff 1571

  • Page 1: Instruction Manual

    1571 1574 Instruction Manual 1591 This instruction manual applies to machines from the following serial numbers onwards: # 2575633 296-12-18 573/002 Betriebsanleitung engl. 04.02...
  • Page 2 This instruction manual applies to all versions and subclasses listed under "Specifications". Reprinting, copying or 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.

  • Page 3: Table Of Contents

    Swing out roller presser ....................7 - 4 Edge trimmer -725/04 for 1571 ..................7 - 5 Edge trimmer -725/04 for PFAFF 1574 and 1591 ............7 - 6 Edge trimmer -726/05 for PFAFF 1591 ................7 - 7 Control panel ......................... 7 - 8 12.01...
  • Page 4 Threading the bobbin case/Adjusting the bobbin thread tension ........9 - 4 Threading the needle thread and regulating its tension on model 1571 and 1591 .... 9 - 5 Threading the needle thread and regulating its tension on model 1574 ......9 - 6 Stitch length ........................
  • Page 5 Abbreviations ........................ 12 - 1 Adjusting the basic machine ..................12 - 2 04.01 Needle position in the direction of sewing on the PFAFF 1571 and 1591 .......12 - 2 04.02 Positioning the needle in the direction of sewing PFAFF 1574 ........12 - 3 04.03...
  • Page 6 Manual cutting test ....................... 12 - 49 07.08 Tension release ......................12 - 50 07.09 Linkage rod (only for the PFAFF 1574) ................12 - 51 Parameter Settings ....................... 12 - 52 Error messages ......................12 - 55 Carrying out a cold start ....................12 - 56 Wearing parts ......................

  • Page 7: Safety

    Safety Safety 1.01 Directives This machine is constructed in accordance with the European regulations contained in the conformity and manufacturer’s declarations. In addition to this Instruction Manual, observe also all generally accepted, statutory and other regulations and legal requirements and all valid environmental protection regulations! The regionally valid regulations of the social insurance society for occupational accidents or other supervisory organisations are to be strictly adhered to! General notes on safety...

  • Page 8: Safety Symbols

    ● 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 information can be obtained from your PFAFF agent. 1 - 2...

  • Page 9: Operating And Specialist Personnel

    Safety 1.05 Operating and specialist personnel Operating personnel .05.01 Operating personnel are persons responsible for the equipping, operating and cleaning of the machine as well as taking care of faults arising in the sewing area. The operating personnel is obliged to observe the following points and must: ●...

  • Page 10: Danger

    Safety 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 needle! Never leave objects on the table while adjusting the machine settings! Objects can become trapped or be slung away! Danger of injury! 63-021...

  • Page 11: Proper Use

    PFAFF 1571 Post to the left of the needle. PFAFF 1591 Post to the right of the needle. The PFAFF 1574 is a high-speed, two-needle postbed sewing machines with a forwards and reverse feeding feed wheel and roller presser. The machines are used for sewing lockstitch seams in the leather and upholstery industries.

  • Page 12: Specifications

    Emission level at workplace at appropriate speed (Noise measurement in accordance with DIN 45 635-48-A-1, ISO 11204, ISO 3744, ISO 4871) ■ PFAFF 1571 and 1591, model A + B at a speed of 2800 spm.: ....... L = 80 dB(A) ■...

  • Page 13: Needles And Threads

    Possible models and subclasses PFAFF 1571, 1591 Model A .................. For sewing lightweight materials PFAFF 1571, 1574, 1591 Model B ................For sewing medium-weight materials PFAFF 1574, 1591 Model C ................For sewing medium-heavy materials Additional equipment: Subclass -725/04 ....................

  • Page 14: Disposal Of Machine

    Disposal of Machine Disposal of Machine ● Proper disposal of the machine is the responsibility of the customer. ● The materials used for the machine are steel, aluminium, brass and various plastic mat- erials. The electrical equipment comprises plastic materials and copper. ●...

  • Page 15: Transportation, Packing And Storage

    Transportation, packing and storage Transportation, packing and storage Transportation to customer's premises Within the Federal Republic of Germany, complete machines (with table and motor) are delivered without packing. Machines without table (only sewing heads) and machines intended for export are packed. Transportation inside the customer's premises The manufacturer cannot be made liable for transportation inside the customer's premises nor to other operating locations.

  • Page 16: Explanation Of Symbols

    Explanation of symbols Explanation of symbols In this instruction 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) 6 - 1...

  • Page 17: Controls

    Controls Controls Main switch ● Turn the machine on and off by turning main switch 1. Fig. 7 - 01 Keys on the machine head ● As long as key 1 is pressed in the sewing mode, the machine sews in reverse. ●...

  • Page 18: Bobbin Thread Monitoring With Stitch Counting

    Controls Bobbin thread monitoring with stitch counting ● 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 9.10 Setting the stitch counting function for bobbin thread...

  • Page 19: Knee Switch

    Controls Knee switch ● By operating knee switch 1 it is possible to choose between 2 preset amounts of fullness or 2 stitch lengths. The function of knee switch 1 must be switched on with the control panel (see chapter 10 Sewing) 1491/1493.13-16 Fig.

  • Page 20: Lever For Raising The Roller Presser

    Controls Lever for raising the roller presser ● The roller presser is raised by turning lever 1. Fig. 7-07 shows the 1574. Fig. 7 - 07 Swing out roller presser ● When the roller presser is raised, it can be swung out by pulling it lightly downwards.

  • Page 21: Edge Trimmer -725/04 For 1571

    Controls Edge trimmer -725/04 for 1571 Keep your hands away from the moving knife! Danger of injury! Switch on knife drive: ● Move lever 1 backwards. The knife moves into operating position. Switch off knife drive: ● Press lever 1. The knife swings backwards.

  • Page 22: Edge Trimmer -725/04 For Pfaff 1574 And 1591

    Controls Edge trimmer -725/04 for PFAFF 1574 and 1591 Fig. 7 - 10 Keep your hands away from the moving knife! Danger of injury! Switch on knife drive: ● Move lever 1 backwards. The knife moves into operating position. Switch off knife drive: ●...

  • Page 23: Edge Trimmer -726/05 For Pfaff 1591

    Controls Edge trimmer -726/05 for PFAFF 1591 Fig. 7 - 11 Keep your hands away from the moving knife! Danger of injury! Switch on knife drive: ● By turning lever 1 the knife is moved into its operating position. Switch off knife drive: ●...

  • Page 24: Control Panel

    Controls Control panel The control panel consists of display 1 and a row of function keys. Fig. 7 - 12 Screen display .12.01 ● During the sewing operation (LED on the Parameter input key is off) the current values are shown on the display with the use of the relevant function keys.
  • Page 25 Controls Start backtacks on/off ● This key is used to switch the start backtacks on or off. When the LED is on, the start backtacks are sewn. End backtacks on/off ● This key is used to switch the end backtacks on or off. When the LED is on, the end backtacks are sewn.

  • Page 26: Installation And Commissioning

    Installation and commissioning Installation and commissioning The machine must only be installed and commissioned by qualified personnel! All relevant safety regulations must be strictly adhered to! If the machine is delivered without a table, be sure to use a stand and table top that can hold the weight of the machine with its motor.

  • Page 27: Fitting The Tilt Lock

    Installation and commissioning Fitting the tilt lock .01.02 Switch off the machine! Danger of injury if the machine is the machine is started accidentally! ● Screw on tilt lock parts 1 and 2, provided in the accessories, using screws 3 and 4. Do not operate the machine without tilt lock 1.

  • Page 28: Fitting The Reel Stand

    Installation and commissioning Fitting the reel stand .01.04 ● Fit the reel stand as shown in Fig. 8-04. ● Afterwards insert the stand in the hole in the table top and secure it with the nuts provided. Fig. 8 - 04 Mounting the flange motor Mounting the flange motor to the bearing plate .02.01...

  • Page 29: Mounting The Flange Motor To The Machine

    Installation and commissioning Mounting the flange motor to the machine .02.02 ● Attach bearing plate 1 of motor 2 to the machine case with screws 3 (only tighten screws 3 slightly). Fig. 8 - 06 Basic position of the machine drive .02.03 ●...
  • Page 30 ● Turn the engine shaft by hand until the value 8 or 11, depending on the machine type, appears on the display (1571, 1591 = 8; 1574 = 11). ● While making sure that neither the motor shaft 4 nor the machine are twisted, fit the toothed belt 5.

  • Page 31: Mounting The Belt Guard Of The Flange Motor

    Installation and commissioning Mounting the belt guard of the flange motor .02.04 ● Attach belt guard 1 with screws 2 and 3. Fig. 8 - 08 Connecting the safety switch .02.05 ● Connect plug 1 of safety switch 2 as shown in Fig.

  • Page 32: Attaching The Earth Cable / Connecting The Plug Connections

    Installation and commissioning Attaching the earth cable / connecting the plug connections ● Screw the earth cables from the sewing head, main switch and control box to the stand. Fig. 8 - 10 63-011 Fig. 8 - 11 ● Connect all plug connections to the control box as shown on their labels. 8 - 7...

  • Page 33: Tilted Work Base

    Installation and commissioning Tilted work base 2x dowel pins Ø 12 x 37 2x Dübel ø12x37 A - A 113,3 ±0,1 339,6 ±0,3 340 ±0,2 49,8 -0,2 49,8 -0,2 8 - 8...

  • Page 34: Table Top Cutout

    Installation and commissioning Table top cutout Screwed insert DIN 7965 (2x) Part no. 12-177 106-05 Stand position Part no. 906-3750-000 8 - 9...

  • Page 35: Commissioning

    Installation and commissioning Commissioning ● Check the machine, particularly the electrical wiring, for any damage. ● Clean the machine thoroughly and then oil it or fill in oil (see Chapter 11 Care and maintenance). ● Have a mechanic check whether the motor of the machine can be operated with the available power supply, and that the motor is correctly connected in the junction box.

  • Page 36: Setting Up

    ● Loosen screw 2 and insert the needle as far as possible. The long groove must face to the right on model 1571 and to the left on model 1591. ● Tighten screw 2 and swing roller presser 1 back into position.

  • Page 37: Inserting The Needle On Model 1574

    Setting up Inserting the needle on model 1574 Switch the machine off! Danger of injury if the machine is started accidentally! Only use needles of system 134-35. ● Raise the roller 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.

  • Page 38: Winding The Bobbin Thread; Adjusting The Primary Thread Tension

    Setting up Winding the bobbin thread; adjusting the primary thread tension Fig. 9 - 03 ● Place an empty bobbin 1 onto bobbin winder spindle 2. ● Thread the bobbin as shown in Fig. 9 - 03 and wind it clockwise around bobbin 1 a few times.

  • Page 39: Removing/Inserting The Bobbin Case

    Setting up Removing/Inserting the bobbin case 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: ●...

  • Page 40: Threading The Needle Thread And Regulating Its Tension On Model 1571 And 1591

    1. ● Thread the needle thread as shown in Fig. 9-06. ● On model 1571 the needle is threaded from the right to the left, and on model 1591 from the left to the right. ● Adjust the needle thread tension by turning milled screw 2.

  • Page 41: Threading The Needle Thread And Regulating Its Tension On Model 1574

    Setting up Threading the needle thread and regulating its tension on model 1574 Fig. 9 - 07 Switch the machine 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. ●...

  • Page 42: Stitch Length

    Setting up Stitch length The stitch length is determined by the setting of the roller presser and feed wheel feed strokes. For applying fullness the roller presser feed stroke must be greater than that of the feed wheel. Input for standard stitch length .08.01 After the machine has been switched on, the current values of the stitch lengths for roller presser and feed wheel are shown in the display.

  • Page 43: Entering/Changing The Code Number

    Setting up Entering/changing the code number ● Switch on the machine. ● Press the Parameter input key (LED is on). ● Select the desired parameter by pressing the Plus-/Minus key. ● Enter the code number (manufacturer’s code setting is "1500") CODE When entering the code number these keys correspond...

  • Page 44: Setting The Stitch Counter For Monitoring The Bobbin Thread

    Setting up Setting the stitch counter for monitoring the bobbin thread ● Switch on the machine. ● Press the Parameter input key (LED is on). ● Select parameter group "760" by pressing +/- on the P-key. ● By pressing +/- on the L-key set the number of stitches to be sewn with one bobbin. The value displayed is multiplied by 200 and shown on the left on the display.

  • Page 45: Sewing

    Sewing Sewing Applying fullness The machine must be installed and connected as described in Chapter 8 Installation and Commissioning. ● Setting up the machine, see Chapter 9 Setting up. ● Switch on the machine, see Chapter 7.01 Main switch. ● If necessary, change the fullness amount, see Chapter 9.08.01 Standard stitch length/ Fullness.

  • Page 46: Care And Maintenance

    Care and maintenance Care and maintenance Cleaning ............daily, several times if in continuous operation Oil level ( hook and needle head parts) ............. daily, before use Lubricating the hook ................. daily, before use Greasing the bevel gears ................. once a year These maintenance intervals are calculated for the average running time of a sin- gle shift operation.

  • Page 47: Oiling The Hook

    Fig. 11 - 03 Only use oil with a mean viscosity of 22.0 mm²/s at 40ºC and a density of 0.865 g/cm³ at 15ºC. We recommend PFAFF sewing machine oil, part number 280-1-120 144. 11 - 2...

  • Page 48: Filling The Oil Reservoir Of The Thread Lubrication Unit

    There must always be oil in the reservoir 1. ● If necessary, fill oil up to mark through hole. We recommend PFAFF thread lubricating oil, Order No. 280-1-120 217. Fig. 11 - 04 Oiling the edge trimmer -726/05 ● All moving parts and bearings marked with arrows in Fig.

  • Page 49: Lubricating The Bevel Gears

    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. 11 - 4...

  • Page 50: Adjustment

    Adjustment Adjustment 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 adjustments, are not mentioned in the text.

  • Page 51: Adjusting The Basic Machine

    Adjustment Adjusting the basic machine Needle position in the direction of sewing on the PFAFF 1571 and 1591 .04.01 Requirement With the stitch length set at "5", in its front and rear point of reversal the needle should be the same distance from the inside edges of the needle hole.

  • Page 52: Positioning The Needle In The Direction Of Sewing Pfaff 1574

    Adjustment Positioning the needle in the direction of sewing PFAFF 1574 .04.02 Requirement The needle must penetrate the middle of the needle hole as viewed in the direction of sewing. Fig. 12 - 02 ● Move the needle bar frame 1 ( screws 2 and 4 and nut 3 ) in accordance with the requirement.

  • Page 53: Limiting The Needle Bar Frame On The Pfaff 1591 And 1571

    Adjustment Limiting the needle bar frame on the PFAFF 1591 and 1571 .04.03 Requirement With the stitch length set at "5", when the needle is in its front and rear point of reversal screw 4 should be the same distance from the inside edge of its hole.

  • Page 54: Preadjusting The Needle Height

    Adjustment Preadjusting the needle height .04.04 Requirement With the needle bar at TDC there must be approx. 22 mm between the point of the needle and the needle plate. 22 mm Fig. 12 - 04 ● Move the needle bar 1 ( screw 2 ) in accordance with the requirement without turning it. 12 - 5...

  • Page 55: Needle Rise, Hook Clearance, Needle Height And Needle Guard On The Pfaff 1571

    Adjustment Needle rise, hook clearance, needle height and needle guard on the PFAFF 1571 04.05 Requirement With the needle bar positioned 2.0 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;...
  • Page 56 Adjustment Fig. 12 - 05 ● Adjust the height of the needle in accordance with requirement 2, compare Chapter 12.04.04 Preliminary adjustment of the needle height. ● Adjust hook post according to Requirement 1 and tighten screws 4 and 5. ●...

  • Page 57: Needle Rise, Hook Clearance, Needle Height And Needle Guard On The Pfaff 1574

    Adjustment Needle rise, hook clearance, needle height and needle guard on the PFAFF 1574 .04.06 Requirement With the needle bar positioned 2,0 mm after BDC on both hooks 1. the hook point must be at needle centre with a hook-to-needle clearance of 0.05 to 0.1 mm;...
  • Page 58 Adjustment Fig. 12 - 06 ● Adjust the height of the needle in accordance with requirement 2, compare Chapter 12.04.04 Preliminary adjustment of the needle height. ● Adjust both hook posts according to Requirement 1 and tighten screws 8. ● Tighten screws 1 and 6. ●...

  • Page 59: Needle Rise, Hook Clearance, Needle Height And Needle Guard On The Pfaff 1591

    Adjustment Needle rise, hook clearance, needle height and needle guard on the PFAFF 1591 .04.07 Requirement With the needle bar positioned 2.0 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;...
  • Page 60 Adjustment Fig. 12 - 07 ● Adjust the height of the needle in accordance with requirement 2, compare Chapter 12.04.04 Preliminary adjustment of the needle height. ● Adjust hook post in accordance with requirement 1 and tighten screws 4. ● Taking the play of the bevel gear wheel into account, tighten screws 2. ●...

  • Page 61: Needle Position Crosswise To Sewing Direction On The Pfaff 1571

    Adjustment Needle position crosswise to sewing direction on the PFAFF 1571 .04.08 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.

  • Page 62: Needle Position Crosswise To Sewing Direction On The Pfaff 1574

    Adjustment Needle position crosswise to sewing direction on the PFAFF 1574 .04.09 Requirement As seen crosswise to the sewing direction, the needles must penetrate in the centre of their needle holes. Fig. 12 - 09 ● Shift bearing plate 1 (screws 2, on both sides of the post) according to the requirement.

  • Page 63: Needle Position Crosswise To Sewing Direction On The Pfaff 1591

    Adjustment Needle position crosswise to sewing direction on the PFAFF 1591 .04.10 Requirement As seen crosswise to the sewing direction, the needle must penetrate in the centre of the needle hole. Fig. 12 - 10 ● Adjust feed wheel post 1 (screws 2, 3 and 4) according to the requirement.

  • Page 64: Height And Stroke Of The Bobbin Case Opener

    ● Adjust bobbin case opener 1 (screw 2) in accordance with requirement 2. On the PFAFF 1574 these adjustments must be repeated on the right post. Depending on the thread size, a variation of the setting in Requirement 2 is permitted.

  • Page 65: Height Of The Feed Wheel On The Pfaff 1571

    Adjustment Height of the feed wheel on the PFAFF 1571 .04.12 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 approx.

  • Page 66: Height Of The Feed Wheel On The Pfaff 1574

    Adjustment Height of the feed wheel on the PFAFF 1574 .04.13 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 approx.

  • Page 67: Height Of The Feed Wheel On The Pfaff 1591

    Adjustment Height of the feed wheel on the PFAFF 1591 .04.14 Requirement The feed wheel should protrude from the needle plate by tooth height (approx. 0.8 mm) Fig. 12 - 14 ● Swing out the roller presser. ● Loosen screws 1.

  • Page 68: Clearance Between Roller Presser And Feed Wheel

    Adjustment Clearance between roller presser and feed wheel .04.15 Requirement With lever 1 raised the clearance between the roller presser and the feed wheel must be 7 mm. Fig. 12 - 15 ● Raise lever 1. ● Move the presser foot bar ( screws 2 ) in accordance with the requirement. Take care to ensure that the roller presser is parallel to the feed wheel.

  • Page 69: Roller-Presser

    Adjustment Roller-presser .04.16 Requirement When the roller-presser 1 is resting on the feed wheel 5 it must 1. be parallel to the feed wheel 5 when viewed in the direction of sewing, 2. be in the middle of the ( left ) needle when viewed in the direction of sewing and 3.

  • Page 70: Retainer (Only On The Pfaff 1574)

    Adjustment Retainer (only on the PFAFF 1574) .04.17 Requirement Retainer 1 should 1. Be as near to the needle as possible, seen in the direction of sewing, and 2. Centred to the needle, seen crosswise to the direction of sewing.

  • Page 71: Automatic Presser-Foot Lifter

    Adjustment Automatic presser-foot lifter .04.18 Requirement When solenoid 1 is activated, lever 3 for the roller-presser must drop automatically. Fig. 12 - 18 ● Move solenoid 1 ( screws 2 ) in accordance with the requirement. ● Turn the machine on and check the requirement. ●...

  • Page 72: Knee Lever

    Adjustment Knee lever .04.19 Requirement 1. The knee lever must have a little play before the roller-presser is raised. 2. The lever for the roller-presser must drop automatically when the knee lever is pressed as far as it will go. 3.

  • Page 73: Tension Release

    Adjustment Tension release .04.20 Requirement With lever 1 raised or the automatic presser foot lifter activated, both tension discs 6 must be at least 0.5 mm apart. Fig. 12 - 20 ● Raise the roller-presser using lever 1. ● Adjust screw 2 ( nut 3 ) in accordance with the requirement. ●...

  • Page 74: Thread Check Spring (Pfaff 1571 And 1591)

    Adjustment Thread check spring (PFAFF 1571 and 1591) .04.21 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.

  • Page 75: Thread Check Springs (Pfaff 1574)

    Adjustment Thread check springs (PFAFF 1574) .04.22 Requirement 1. The movement of thread check springs 3 and 6 should be completed when the needle points penetrate 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 springs 3 and 6 should rise slightly from supports 1 and 9.

  • Page 76: Bobbin Winder

    Adjustment Bobbin winder .04.23 Requirements 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.

  • Page 77: Roller-Presser Pressure

    Adjustment Roller-presser pressure .04.24 Requirement The material must be fed reliably. No pressure marks may be made on the material. Fig. 12 - 24 ● Adjust the roller-presser pressure with screw 1 in accordance with the requirement. Screw 1 is underneath a cover. 12 - 28...

  • Page 78: Lubrication

    Adjustment Lubrication .04.25 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. Fig. 12 - 25 ● Check whether oil has been filled in and that there is no air in the oil lines. ●...

  • Page 79: Re-Engage Safety Coupling

    Adjustment Re-engage safety coupling .04.26 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. 12 - 26 ●...

  • Page 80: Adjusting The Edge Trimmer -725/04

    Adjustment Adjusting the edge trimmer -725/04 Position of the knife holder on model 1571 .05.01 Requirements When the thread trimmer is engaged and the adjusting wheel has been turned to its highest position 1. the knife holder 2 must be parallel to the post and 2.

  • Page 81: Position Of The Knife Holder On Models 1574 And 1591

    Adjustment Position of the knife holder on models 1574 and 1591 .05.02 Requirement When the thread trimmer is engaged, the centre of the angular knife opening must be level with the top edge of the needle plate. Fig. 12 - 28 ●...

  • Page 82: Knife Stroke On Model 1571

    Adjustment Knife stroke on model 1571 .05.03 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. 12 - 29 ● Turn eccentric 1 (screws 2) so that the marking of the desired cutting stroke is opposite the marking on clamp collar 3.

  • Page 83: Knife Stroke On Models 1574 And 1591

    Adjustment Knife stroke on models 1574 and 1591 .05.04 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. 12 - 30 ● Adjust crank 1 (nut 2) in slotted lever 3 according to the requirement. 12 - 34...

  • Page 84: Cutting Stroke On Model 1571

    Adjustment Cutting stroke on model 1571 .05.05 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 turned by hand.

  • Page 85: Cutting Stroke On Models 1574 And 1591

    Adjustment Cutting stroke on models 1574 and 1591 .05.06 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 turned by hand.

  • Page 86: Knife Position

    When the edge trimmer is engaged, the knife should rest lightly on the needle plate insert, but no whistling sound should occur during trimming. Fig. 12 - 33 1571 ● Adjust screw 1 (screw 2) according to the requirements. ● Carry out a cutting test and repeat adjustment if necessary.

  • Page 87: Adjusting The Thread Trimmer -726/05 On Model 1591

    Adjustment Adjusting the thread trimmer -726/05 on model 1591 Position of the knife to the needle plate 06.01 Requirement When the edge trimmer is engaged, the knife 2 must be parallel to the needle plate insert. Fig. 12 - 34 ●...

  • Page 88: Knife Position Crosswise To Sewing Direction

    Adjustment Knife position crosswise to sewing direction .06.02 Requirement When the edge trimmer is engaged, knife 2 must be vertical and rest lightly on the needle plate insert. Fig. 12 - 35 ● Switch off the machine and engage the edge trimmer. ●...

  • Page 89: Knife Height

    Adjustment Knife height .06.03 Requirement When the edge trimmer is engaged, the centre of the angular knife opening must be at the same height as the upper edge of the needle plate. Fig. 12 - 36 ● Switch off the machine and engage the edge trimmer. ●...

  • Page 90: Cutting Stroke

    Adjustment Cutting stroke .06.04 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 turned by hand.

  • Page 91: Knife Stroke

    Adjustment Knife stroke .06.05 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. 12 - 38 ● 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.

  • Page 92: Adjusting The Thread Trimmer -900/81

    Adjustment Adjusting the thread trimmer -900/81 Resting position of the roller lever / radial position of the control cam .07.01 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.

  • Page 93: Position Of The Thread Catcher Holder

    Adjustment Position of the thread catcher holder .07.02 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 between the toothed segment 4 and the outer edge of the thread catcher holder 1 should be the same (see arrow).

  • Page 94: Distance Between Thread Catcher And Needle Plate

    Adjustment Distance between thread catcher and needle plate .07.03 Requirement During its swivel movement thread catcher 1 should not pass the edge of the needle plate (see arrow). Fig. 12 - 41 ● Move thread catcher 1 (screws 2, two screws) parallel to the thread catcher holder in accordance with the requirement.

  • Page 95: Position Of The Thread Catcher

    Adjustment Position of the thread catcher .07.04 Requirement 1. The bottom edge of thread catcher 1 should be 0.6 mm away from bobbin case 3. 2. When the thread trimmer is in its resting position, the back edge of the thread catcher should be approx.

  • Page 96: Knife Position And Knife Pressure

    Adjustment Knife position and knife pressure .07.05 Requirement 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. 61-109 Fig.

  • Page 97: Bobbin Thread Retaining Spring

    Adjustment Bobbin thread retaining spring .07.06 Requirement 1. The bobbin thread clamp spring should be guided reliably in the thread groove of the thread catcher 3. 2. The tension of the bobbin thread spring clamp should be as low as possible, but the bobbin thread should be held reliably after the cutting operation.

  • Page 98: Manual Cutting Test

    Adjustment Manual cutting test .07.07 Requirement 1. When thread catcher 1 is on its forward stroke, it must not carry bobbin thread 3 forward too. 2. When thread catcher 1 is in its front position, bobbin thread 3 must be held reliably by hook 4.

  • Page 99: Tension Release

    Adjustment Tension release .07.08 Requirement When solenoid 1 is activated, the tensions disks 3 should be at a distance of at least 0.5 mm from each other. Fig. 12 - 46 ● Activate magnet 1. ● Adjust magnet 1 (screws 2) in accordance with the requirement. The point of time for releasing the tension can be set with the service functions, see Chapter 12.08 Parameter settings.

  • Page 100: Linkage Rod (Only For The Pfaff 1574)

    Adjustment Linkage rod (only for the PFAFF 1574) .07.09 Requirement When the thread trimmer is in its resting position, the drive levers 1 must be parallel. Fig. 12 - 47 ● Adjust drive levers 1 (screws 2) in accordance with the requirement.

  • Page 101: Parameter Settings

    0302/…. Display software version of stepping motor processor 0305/…. Machine configuration 1 = 1571, 1574, 1591 Lowering speed roller presser I = fast, II = slow Allocation key 2 I = single stitch, II = needle raised Allocation key 3 I = semi-stitch, II = needle raised Position take-up lever t.d.c.
  • Page 102 Adjustment Groupe Parameter Description Setting Setvalue range 1571 1574 1591 Position cutting magnet "tacting" 0 - 127 Position cutting magnet "off" 0 - 127 Reverse position 0 -127 Placement stitch position 0 - 127 Position thread tension release 0 - 127 Delay time lifting roller presser 0.01 - 1.50 s...
  • Page 103 Adjustment Groupe Parameter Description Setting Setvalue range 1571 1574 1591 Basic position of machine drive (see Chap. 8.02.03) Carry out cold start (see Chap. 12.09) P-quota speed controller 1 - 50 I-quota speed controller 0 - 100 P-quota position controller...

  • Page 104: Error Messages

    Adjustment Groupe Parameter Description Setting Setvalue range 1571 1574 1591 Right of access function group 500 0 - 1 Right of access function group 600 0 - 1 Right of access function group 700 0 - 1 Right of access function group 800...

  • Page 105: Carrying Out A Cold Start

    Adjustment Carrying out a cold start ● Switch on the machine. ● Press the Parameter input key (LED on). ● Select the required parameter by pressing the Plus/Minus key. ● Enter the code number (factory setting for code "1500"). CODE ●...

  • Page 106: Wearing Parts

    Wearing parts Wearing parts This list indicates the most important wearing parts. You can request a detailed parts list for the complete machine under parts number 296-12-18 573. PFAFF 1571, 1574, 1591 12-305 174-15 91-176 329-05 11-130 284-15 PFAFF 1574...
  • Page 107 Wearing parts For sub-class -900/81 11-130 092-15 (2x) 12-315 080-15 (2x) 11-108 846-15 (2x) 91-263 348-05 91-263 139-05 11-108 093-15 (2x) 91-263 294-05 99-137 151-45 91-171 049-05 91-171 042-05 571-725/04 574-725/04; 591-725/04 591-726/05 11-130 167-15 91-175 180-15 11-173 168-15 91-119 202-04/001 91-011 165-04/001 91-011 324-04/003 13 - 2...

  • Page 108: Circuit Diagrams

    Circuit diagrams Reference list for circuit diagrams Controller Quick P320MS (P321MS) Control panel OC TOP DX355 Needle pendulum (only with P321MS) Sewing lamp LED Stitch counter Sewing motor Stepping motor feed wheel Stepping motor roller presser Stepping motor needle (only with P321MS) Main switch Pedal set value transmitter Knee switch (program)
  • Page 109 91-191 442-95 General plan - circuit diagrams Part 1 Version 08.01.01 14 - 2...
  • Page 110 General plan - circuit diagrams 91-191 442-95 Version 06.12.01 Part 2 14 - 3...
  • Page 111 91-191 442-95 General plan - circuit diagrams Part 3 Version 08.02.01 14 - 4...
  • Page 112 General plan - circuit diagrams 91-191 442-95 Version 08.02.01 Part 4 14 - 5...
  • Page 113 Notes...
  • Page 114 PFAFF Industrie Maschinen 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.
  • Page 115 Supplement to the instruction manual for the series 570 / 590 ; 1570 / 1590 296-12-18 722/002 Ergänzung zur Betriebsanleitung engl. 01.2003...
  • Page 116 Comments Comments Various improvements have been made to the machines of the series 570 / 590; 1570 / 1590 with thread trimmer –900/81: 1. For a better sewing start after the thread has been trimmed, following parts were modified or added as new parts: a thinner thread lubricating felt (6 mm thick) to reduce the primary thread tension, Part-No.
  • Page 117 Conversion Remove felt 1 and replace it with the new felt. Loosen screw 2 and pull out thread tension device 3 to the right. Install the weaker spring and replace the parts in the reverse order. Install new bobbin case 4 with reversing cam. Loosen screw 5 (see arrow) and remove the needle holder.
  • Page 118 Adjustment Position of the thread catcher Requirement 1. The bottom edge of thread catcher 1 must be at a distance of 0.1 mm from the positioning finger of the bobbin case 3. 2. When the thread trimming device is in its neutral position, the back edge of the thread catcher should be approx.
  • Page 119 Check list Check list for correcting problems with the thread trimming device Problem Cause Correction Bobbin thread clamp spring setting The first stitches have not See instruction manual (Chapter is too strong been sewn Bobbin thread clamp spring) After trimming the needle thread is primary Check/adjust the tension.
  • Page 120 Check list Check list for correcting problems with the thread trimming device Problem Cause Correction The bobbin thread has not Thread catcher is too high, Check and adjust the position of the been cut incorrect position of the thread catcher (see Chapter Position of the catcher thread catcher Page 4) Knife pressure is too low...
  • Page 122 PFAFF Industrie Maschinen 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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