Page 1 ® Industrial 1571 1574 INSTRUCTION MANUAL 1591 This instruction manual applies to machines from the following serial numbers onwards: # 2 620 574 296-12-18 725/002 Betriebsanleitung engl. 06.09...
Page 2 This Instruction Manual is valid for all models and subclasses listed in the chapter "Speciﬁ cations ". The reprinting, copying or translation of PFAFF Instruction Manuals, whether in whole or in part, is only permitted with our previous authorization and with written reference to 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 Displays on the screen ....................
Page 4 .02.04 Mounting the toothed belt / Basic position of the machine drive unit on the 1571 and 1591 ........8 - 5 .02.05 Mounting the toothed belt / Basic position of the machine drive unit on the 1574 ..8 - 7 .02.06...
Page 5 Adjusting the basic machine ..................13 - 2 04.01 Needle position in the direction of sewing on the PFAFF 1571 and 1591 ....13 - 2 04.02 Positioning the needle in the direction of sewing PFAFF 1574........13 - 3 04.03...
Page 6 Re-engage safety coupling ..................13 - 30 Adjusting the edge trimmer -725/04 ................13 - 31 05.01 Position of the knife holder on model 1571 ..............13 - 31 05.02 Position of the knife holder on models 1574 and 1591 ..........13 - 32 05.03...
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: always observe the Notes on Safety in the Instruction Manual! never use any working methods which could limit the level of safety in using the machine!
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
(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) PFAFF 1574 model B at a speed of 2800 spm.: ..........L = 81 dB(A) PFAFF 1574 and 1591,model C at a speed of 1600 spm.: ......
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. The machine is to be disposed of according to the locally valid pollution control regula- tions;...
Page 15: Transportation, Packing And Storage
Transportation, packing and storage Transportation, packing and storage Transportation to customer's premises The machines are delivered completely 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. It must be ensured that the machines are only transported in an upright position.
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. With parameters "203"...
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 Set- ting the stitch counting function for bobbin thread monitoring.
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. In the programmed sewing mode it is possible to switch to the next seam section with knee switch 1. The function of knee switch 1 must be switched on with the control panel (see chapter 10...
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 roller presser 1 is raised, it is possible to disengage it by pulling it down slightly.
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: Press lever 1.
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: By pressing lever 2 or key 3 the knife is put out of operation.
Page 24: Control Panel
During the power-on phase the control panel automatically switches on all LCD segments and a beep tone for a short time. Afterwards the lettering PFAFF appears on the display, until the higher-ranking control unit sends commands to the control panel.
Page 25 Controls End backtacks By pressing this key, the backtacking function at the end of the seam (end backtacks) is switched on or off. The number of reverse stitches (C) or forward stitches (D) can be changed in each case by pressing the +/- key underneath. To convert from double backtacks to single backtacks the relevant number of stitches for the seam segment is set at zero.
Page 26 Controls Stop By pressing this key the corresponding function is switched on or off. If the function is activated, in the programmed sewing mode the machine stops automatically at the end of the seam section. In the manual sewing mode, if this function is activated, the roller presser and feel wheel drive are switched off, in order to e.g.
Page 27: 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 28: 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 29: Mounting The Flange Motor
Installation and commissioning Mounting the flange motor Mounting the flange motor to the bearing plate .02.01 Fig. 8 - 04 Attach bearing plate 1 to motor 2 with screws 3 as shown in Fig. 8 - 04. Remove the wedge from motor shaft 4. Attach angle bracket 5 with screws 6.
Page 30: Connecting The Plug-In Connections And Earth Cables
Fig. 8 - 06 Connect all plugs as labelled to the control box 1. On the PFAFF 1574 an adapter cable must be plugged into socket X3 (also see Fig. 8 - 09). Screw the earth cable from the sewing head to earth point A.
Page 31: Mounting The Toothed Belt / Basic Position Of The Machine Drive Unit On The 1571 And 1591
Installation and commissioning Mounting the toothed belt / .02.04 Basic position of the machine drive unit on the 1571 and 1591 Switch on the machine. Press TE/Speed key twice to select the input mode. Select the parameter group "600" by pressing the corresponding +/- key.
Page 32 Installation and commissioning Fig. 8 - 07 Swing the bearing plate 6 of the motor, so that the belt 5 is tightened. In this position tighten screws 7. Turn the balance wheel in sewing direction until the needle point descending from above, is level with the top edge of the needle plate and re-check the value.
Page 33: Mounting The Toothed Belt / Basic Position Of The Machine Drive Unit On The 1574
Installation and commissioning Mounting the toothed belt / Basic position of the machine drive unit on the 1574 .02.05 In this position fit toothed belt 5 (Fig. 8 - 07). Swing the bearing plate 6 of the motor, so that the toothed belt 5 is tensioned. In this position tighten screws 7.
Page 34 Installation and commissioning Switch on the machine. Press TE/Speed key twice to select the input mode. Select the parameter group "600" by pressing the corresponding +/- key. Confirm the selection by pressing the corresponding +/- key. Enter the code number, see Chapter 9.10 Entering/changing the code number. Select the parameter group "603"...
Page 35: Mounting The Belt Guard Of The Flange Motor
Installation and commissioning Loosen screws 10 of the synchronizer. Hold the synchronizer shaft and turn the balance wheel in sewing direction until the needle point, descending from above, is level with the top edge of the needle plate. Tighten the screws of the synchronizer. By pressing the corresponding +/- key let the machine carry out another revolution and check the setting –...
Page 36: Connecting The Safety Switch
Installation and commissioning Connecting the safety switch .02.07 Connect plug 1 of safety switch 2 as shown in Fig. 8-11. When the machine head is tilted back,the safety switch prevents the machine from starting when the main switch is on. Fig.
Page 37: 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 - 11...
Page 38: 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 - 12...
Page 39: Fitting The Reel Stand
Installation and commissioning Fitting the reel stand Fit the reel stand as shown in Fig. 8-12 Afterwards insert the stand in the hole in the table top and secure it with the nuts provided. Fig. 8 - 12 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 12 Care and maintenance).
Page 40: Setting Up
For all setting-up work the machine must be disconnected from its po- wer supply by turning off the on/off switch, or removing the plug from the electric power socket. Inserting the needle on model PFAFF 1571 and 1591 Switch the machine off! Danger of injury if the machine is started accidentally! Only use needles of system 134.
Page 41: 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 42: 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: Insert bobbin case 2. Close the latch and close the post cap.
Page 43: Threading The Needle Thread And Regulating Its Tension On
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 44: 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. The left needle is threaded from the right to the left, and the right needle from the left to the right.
Page 45: Entering The Stitch Length
Setting up Entering the stitch length The stitch length is set by adjusting the feed strokes of the roller presser and the feed wheel. For the application of fullness, the feed stroke of the roller presser must be larger or smaller than the feed stroke of the feed wheel.
Page 46: Entering The Start And End Backtacks
Setting up Entering the start and end backtacks Switch on the machine. Switch on the relevant function by pressing the Start backtack and/or End backtack keys. (Arrow appears under the corresponding function key) By pressing the Scroll key switch to the input menu for the start and end backtacks. By pressing the corresponding +/- key select the desired value for the number of forward stitches (A) of the start backtack.
Page 47: Entering/Changing The Code Number
Setting up Entering/changing the code number Switch on the machine. Select the input mode by pressing the TE/Speed key twice. By pressing the corresponding +/- key select the parameter group "800". Confirm the selection by pressing the corresponding +/- key. CODE: 1500 Enter the code number by pressing the corresponding keys (factory code setting is...
Page 48 Setting up By pressing the corresponding +/- key select the parameter "810". 1500 Confirm the selection by pressing the corresponding +/- key. 1 2 3 4 5 6 7 8 CODE: 1500 Enter the desired code by pressing the corresponding keys, also see Chapter 7.09.02 Key functions.
Page 49: Setting The Stitch Count Function For Bobbin Thread Control
Setting up Setting the stitch count function for bobbin thread control Switch on the machine. Select the input mode by pressing the TE/Speed key twice. By pressing the corresponding +/- key select the parameter "105". Set the number of stitches to be sewn with one bobbin by pressing the corresponding +/- keys.
Page 50: Sewing
Sewing Sewing In the sewing mode all settings relating to the sewing operation are shown on the display. Functions can be switched on and off by pressing a key. Values for start backtacks and end backtacks or stitch placement can be changed directly. In this mode a difference is made between manual sewing and programmed sewing.
Page 51: Programmed Sewing
Sewing Programmed sewing In the programmed sewing mode a difference is made between fixed programs (program numbers 1 and 2) and freely programmable seam programs (program numbers 3-99). The fixed programs are used for the quick and easy production of seams with different stitch lengths or amounts of fullness.
Page 52: Program Interruption
Sewing Other programmed sewing functions, also see Chapter 7.09.02 Function keys: Stitch placement function Raised roller presser after thread trimming on/off on/off Knee switch function on/off Thread trimming on/off Backtack suppression Seam section speed on/off Start backtack on/off Reverse sewing direction on/off End backtack on/off Program interruption Raised needle position on/off...
Page 53: Error Messages
Sewing Error messages If an error occurs, the text "ERROR" appears on the display, together with an error code and short instructions. An error message is caused by incorrect settings, defective elements or seam programs and by overload conditions. For an explanation of the error codes see Chapter 13.09 Explanation of the error messages.
Page 54: Input
Input Input Summary of the functions in the input mode The input mode is selected by pressing the TE/Speed key twice. In the input mode a difference is made between parameter input and seam program input. After selecting the input mode, use the PM key to move into the seam program input. Summary of the parameter functions .01.01 Select the parameter group (corresponding +/- key)
Page 55: Summary Of The Seam Program Inputs
Input Summary of the seam program inputs .01.02 Select the seam program input function Select the program number (corresponding +/- key) Select the input variant Seam program input/alteration Confirm selection (Enter) Seam section Stitch length (feed stroke) roller presser Stitch length (feed stroke) feed wheel Scroll (only if following functions are activated) Seam section Max.
Page 56 Input Select the input variant Seam input with Teach In Confirm selection (Enter) Seam section Stitch length (feed stroke) roller presser Stitch length (feed stroke) feed wheel Scroll (only if following functions are activated) Seam section Max. speed Stitch placement position Scroll (only if following functions are activated) Seam section Forward stitches start backtacks...
Page 57: Seam Program Input Variants
Input Seam program input variants To enter, change or delete seam programs there are basically three possible input variants Seam program input/alteration (input of values), Seam input with Teach In and Deleting seam programs. The required input variant is selected as follows: Switch on the machine Select input mode by pressing TE/Speed key twice.
Page 58: Altering Existing Seam Programs
Input Altering existing seam programs The following description assumes that a seam program with all the necessary parameters has already been created. Switch on the machine. Select the input variant "seam program input/alteration", see Chapter 11.02 Seam pro- gram input variants. Select the desired program number with the corresponding +/- key.
Page 59 Input 3500 To achieve the illustrated input menu, the following functions must be activated: F1 (Placement stitch) – and/or Speed (speed limitation) – and/or Stitch count. Select the desired speed value for the current seam section by pressing the corresponding +/- key. Select the desired speed value for the number of stitches in the current seam section by pressing the corresponding +/- key.
Page 60 Input This input menu can only be selected if the end backtack function is activated. By pressing the corresponding +/- key select the desired value for the number of reverse stitches (C) of the end backtack for the current seam section. By pressing the corresponding +/- key select the desired value for the number of forward stitches (D) of the end backtack for the current seam section.
Page 61: Deleting Seam Programs
Input Deleting seam programs Switch on the machine Select input mode by pressing TE/Speed key twice. Press PM to select the seam program input function. Enter the code number, see Chapter 9.10 Entering/changing the code number. Select the required program number with the corresponding +/- key. Select the input variant "Deleting seam programs"...
Page 62: Seam Programming Examples
Input Seam programming examples The procedure for creating seam programs using the seam program input function and the Teach In function is described below with the help of examples. The display settings shown in the examples only appear like this if no seam pro- gram has been entered under the selected program number.
Page 63 Input The first seam section should have - a double start backtack (2 forward and 2 reverse stitches) - backtack speed of 700 spm - stitch count (5 stitches) - a 3.5 mm stitch length (for roller presser and feed wheel). By pressing the corresponding +/- key set the stitch length for the roller presser at "3.5".
Page 64 Input By pressing the Scroll key, select the following display on the screen. By pressing the corresponding +/- key select "NO" to add further seam sections. By pressing "+" on the corresponding +/- key change to the second seam section. In the second seam section - the stitch length (for roller presser and feed wheel) should be 2.5 mm - and a stitch count should be carried out (1 stitch).
Page 65 Input By pressing "+" on the corresponding +/- key change to the third seam section. In the third seam section - the stitch length (for roller presser and feed wheel) should be 3 mm - a stitch count should be carried out (2 stitches), - and the seam should be sewn in reverse.
Page 66 Input In the fourth seam section - the stitch length (for roller presser and feed wheel) should be 5 mm - a stitch count should be carried out (1 stitch). By pressing the corresponding +/- key set the stitch length for the roller presser at "5.0 ".
Page 67 Input The fifth seam section should have - a double end backtack - a 5 mm stitch length (for roller presser and feed wheel) - backtack speed of 700 spm - a stitch count (1 stitch) - and the thread trimming function at the end of the seam section. By pressing the corresponding +/- key set the stitch length for the roller presser at "5.0 ".
Page 68 Input By pressing the corresponding +/- key set the number of stitches at "1". By pressing the thread trimming key, switch on the corresponding function for the seam section end. By pressing the Scroll key, select the following screen display. By pressing the corresponding +/- key select "YES"...
Page 69: Seam Input Example Using The Teach In Method
Input Seam input example using the Teach In method .05.02 The seam to be programmed should - have 3 seam sections - and be stored under program number 8. Switch on the machine Select input mode by pressing TE/Speed key twice. Press PM to select the seam program input function.
Page 70 Input The first seam section should have - the knee switch function at the end of the seam section - and a 2.8 mm stitch length (for roller presser and feed wheel). By pressing the corresponding +/- key set the stitch length for the roller presser at "2.8 ".
Page 71 Input The second seam section should have - the knee switch function at the end of the seam section - and a 2.4 mm stitch length (for roller presser and feed wheel). By pressing the corresponding +/- key set the stitch length for the roller presser at "2.4 ".
Page 72 Input Sew the third seam section manually. After the machine has stopped the seam section end must be entered. By pressing the pedal in position "2" activate the seam section end by pedal, see Chapter 7.04 Pedal. By pressing the thread trimming key, switch on the corresponding function for the seam section.
Page 73: 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 single shift operation.
Page 74: Oiling The Hook
Fig. 12 - 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. 12 - 2...
Page 75: 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. 12 - 04 Oiling the edge trimmer -726/05 All moving parts and bearings marked with arrows in Fig.
Page 76: 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. 12 - 4...
Page 77: Adjustment
Adjustment Adjustment Unless stated otherwise, during all adjustment work the machine must be disconnected from the electric and pneumatic power supply! Danger of injury if the machine is started accidentally! 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.
Page 78: 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 79: 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. 13 - 02 Move the needle bar frame 1 ( screws 2 and 4 and nut 3 ) in accordance with the requirement.
Page 80: 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 81: Preadjusting The Needle Height
Adjustment Preadjusting the needle height .04.04 Requirement With the needle bar at TDC there must be approx. 21 mm between the point of the needle and the needle plate. 21 mm Fig. 13 - 04 Move the needle bar 1 ( screw 2 ) in accordance with the requirement without turning it. 13 - 5...
Page 82: 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 83 Adjustment Bring the needle bar to 2.0 mm after b.d.c. and place the locking pin for the needle bar rise (part no. 61-111 641-39) in hole 6. Set the hook point to the centre of the needle, taking care to see that the needle is not deflected by needle guard 7.
Page 84: 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 85 Adjustment Loosen screws 1, 2, 3, 4, 5, 6 and 7. Loosen screws 8 slightly. Bring the needle bar to 2.0 mm after b.d.c. and place the locking pin for the needle bar rise (part no. 61-111 641-39) in hole 9. Set both hook points to the centre of the needle, taking care to see that the needles are not deflected by needle guard 10.
Page 86: 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 87 Adjustment Bring the needle bar to 2.0 mm after b.d.c. and place the locking pin for the needle bar rise (part no. 61-111 641-39) in hole 6. Set the hook point to the centre of the needle, taking care to see that the needle is not deflected by needle guard 7.
Page 88: 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 89: 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. 13 - 09 Shift bearing plate 1 (screws 2, on both sides of the post) according to the requirement.
Page 90: 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. 13 - 10 Adjust feed wheel post 1 (screws 2, 3 and 4) according to the requirement.
Page 91: 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 92: 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 93: 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 94: 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. 13 - 14 Swing out the roller presser. Loosen screws 1. Adjust eccentric 3 (fastening screw accessible through hole 2) according to the requirement.
Page 95: 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. 13 - 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 96: 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 97: 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 98: 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. 13 - 18 Move solenoid 1 ( screws 2 ) in accordance with the requirement. Turn the machine on and check the requirement. Turn the machine off.
Page 99: 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 100: Tension Release
Adjustment Tension release .04.20 Requirement The two tension disks 8 should be at least 0.5 mm apart 1. when lever 1 is raised, 2. when the automatic presser foot lift is operated or 3. when solenoid 6 is pressed. Fig. 13 - 20 Raise lever 1 and adjust screw 2 (nut 3) in accordance with requirement 1.
Page 101: 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 102: 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 103: 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 104: 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. 13 - 24 Adjust the presser foot pressure with screw 1 in accordance with the requirement. Screw 1 is located under a cover. If the presser foot pressure is low, the lowering speed of the presser foot can be increased with parameter „202“, see Chapter 13.08 Parameter settings.
Page 105: 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. 13 - 25 Check whether oil has been filled in and that there is no air in the oil lines. Let the machine run for 2-3 min..
Page 106: 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. 13 - 26 Remove jammed thread.
Page 107: 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 108: 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. 13 - 28 Switch off the machine and engage the edge trimmer.
Page 109: 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. 13 - 29 Turn eccentric 1 (screws 2) so that the marking of the desired cutting stroke is opposite the marking on clamp collar 3.
Page 110: 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. 13 - 30 Adjust crank 1 (nut 2) in slotted lever 3 according to the requirement. 13 - 34...
Page 111: 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 112: 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 113: 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. 13 - 33 1571 Adjust screw 1 (screw 2) according to the requirements. Carry out a cutting test and repeat adjustment if necessary.
Page 114: 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. 13 - 34 Switch off the machine and engage the edge trimmer.
Page 115: 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. 13 - 35 Switch off the machine and engage the edge trimmer. Bring the knife into a vertical postion by turning milled screw 1.
Page 116: 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. 13 - 36 Switch off the machine and engage the edge trimmer. Adjust milled screw 1 according to the requirement.
Page 117: 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 118: 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. 13 - 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 119: 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 120: 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 121: 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. 13 - 41 Move thread catcher 1 (screws 2, two screws) parallel to the thread catcher holder in accordance with the requirement.
Page 122: Position Of The Thread Catcher
Adjustment Position of the thread catcher .07.04 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 neutral position, the rear edge of thread catcher should be positioned approx.
Page 123: 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. 86-025 Fig.
Page 124: 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 125: 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 126: Linkage Rod (Only For The Pfaff 1574)
Adjustment Linkage rod (only for the PFAFF 1574) .07.08 Requirement When the thread trimmer is in its resting position, the drive levers 1 must be parallel. Fig. 13 - 46 Adjust drive levers 1 (screws 2) in accordance with the requirement.
Page 127: Parameter Settings
Adjustment Parameter settings Parameter input example .08.01 Switch on the machine Select input mode by pressing TE/Speed key twice. Select parameter group "500" by pressing the corresponding +/- key. Confirm selection by pressing the corresponding +/- key. Enter the code number, see Chapter 9.10 Entering/changing the code number. 3500 Select the desired parameter, e.g.
Page 128: List Of Parameters
Beep tone for section change I = off, II = on I - II Machine configuration 1 = 1571 + 1591, 2 = 1571 + 1591 with sensor 6 = 1574, 7 = 1574 with sensor 1 - 7 Lowering speed roller presser...
Page 129 0 - 15 Move stepping motor roller presser and feed wheel Display inputs 0123456789ABCDEF 0: Centre position needle(1571, 1591) E16 1: End position needle(1571, 1591) E15) 2: Coding intermittent (E14) 3: not assigned (E13) 4: not assigned (E12) 5: not assigned (E11)
Page 130 Adjustment Basic position of the machine drive unit (see Chap. 8.02.04 and 8.02.05 ) (8±3) Carry out cold start (see Chap. 13.11) Stitch formation check by turning the balance wheel P-quota speed controller 1 - 50 I-quota speed controller 0 - 100 P-quota position controller 1 - 50 D-quota position controller...
Page 131: Explanation Of The Error Messages
Adjustment 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 0 – 1 Right of access program creation 0 –...
Page 132: Carrying Out A Cold Start
Adjustment Carrying out a cold start Switch on the machine. Press the TE/Speed key twice to select the input mode. Select parameter group "600" by pressing the corresponding +/- key. Confirm selection by pressing the corresponding +/- key. Enter the code number, see Chapter 9.10 Entering/changing the code number. RESET Select parameter "604"...
Page 133: Internet Update Of The Machine Software
Adjustment Internet update of the machine software The machine software can be updated with PFAFF flash programming. For this purpose the PFP boot program and the appropriate control software for the machine type must be installed on a PC. To transfer the data to the machine, the PC and the machine control unit must be connected with an appropriate null modem cable (part no.
Page 134: Wearing Parts
Wearing parts 14Wearing parts This list indicates the most important wearing parts. You can request a detailed parts list for the complete machine under parts number 296-12-18 725. PFAFF 1571, 1574, 1591 12-305 174-15 91-176 329-05 11-130 284-15 PFAFF 1574...
Page 135 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 1571-725/04 1574-725/04; 1591-725/04 1591-726/05 91-175 180-15 11-130 167-15 11-173 168-15 91-011 165-04/001 91-119 202-04/001 91-011 324-04/003 14 - 2...
Page 136: Circuit Diagrams
Start inhibitor switch Mains plug RS232 – interface 1 Control panel S2 VSS sewing head identification Incremental transmitter (sewing motor) Incremental transmitter (sewing motor) PFAFF 1574 Stepping motor feed wheel Stepping motor roller presser Inputs Stepping motor needle (only with P321 MS) RS232 –...
Page 137 91-191 442-95 General plan - circuit diagrams Part 1 Version 25.11.03 15 - 2...
Page 138 General plan - circuit diagrams 91-191 442-95 Version 25.11.03 Part 2 15 - 3...
Page 139 91-191 442-95 Part 3 Version 25.11.03 General plan - circuit diagrams 15 - 4...
Page 140 General plan - circuit diagrams 91-191 442-95 Version 25.11.03 Part 4 15 - 5...
Page 141 Note...
Page 142 PFAFF Industriesysteme und Maschinen AG Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern Telefon: +49 - 6301 3205 - 0 Telefax: +49 - 6301 3205 - 1386 E-mail: info@pfaff-industrial.com Gedruckt in der BRD / Printed in Germany / Imprimé en la R.F.A. / Impreso en la R.F.A...

This manual is also suitable for:

1574 1591

Pfaff 1571 Instruction Manual

Quick Links

Related Manuals for Pfaff 1571

Summary of Contents for Pfaff 1571

This manual is also suitable for:

Table of Contents