Related Manuals for Pfaff 471
Summary of Contents for Pfaff 471
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Page 1: Instruction Manual
Instruction Manual This instruction manual applies to machines from the following serial numbers onwards: PFAFF 471 # 2560474 PFAFF 474 # 2561194 PFAFF 491 # 2561421 296-12-18 398/002 Betriebsanleitung engl. 12.99... - 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.
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Page 3: Table Of Contents
Key for setting stitch length ................... 7 - 4 Swing out roller presser ....................7 - 4 Edge trimmer -725/04 for 471 ..................7 - 5 Edge trimmer -725/04 for 474 and 491 ................7 - 6 Edge trimmer -726/05 for 491 ..................7 - 7 Installation and commissioning ................. - Page 4 Preliminary adjustment of the needle height ..............11 - 5 .04.05 Needle rise, hook clearance, needle height and needle guard on the PFAFF 471 ...11 - 6 .04.06 Needle rise, hook clearance, needle height and needle guard on the PFAFF 474 ...11 - 8 .04.07...
- Page 5 11.09.02 Coupling for roller presser drive ..................11 - 65 11.09.03 Bevel gears for feed wheel drive (on the PFAFF 471 and 474) ........11 - 66 11.09.04 Bevel gear play (on the PFAFF 471 and 474) ..............11 - 67 11.09.05 Bevel gears for feed wheel drive (on the PFAFF 491) ............
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Page 6: 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 7: 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 8: 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! not wear loose-fitting clothing or jewellery such as chains or rings! -
Page 9: 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! Switch the machine off before tilting it backwards! -
Page 10: Proper Use
Proper use Proper use The PFAFF 471 is a single needle, high-speed post bed sewing machine (post to the left of the needle) with driven feed wheel and roller presser and synchronized needle. The PFAFF 474 is a two-needle, high-speed post bed sewing machine with driven feed... -
Page 11: Specifications
Working noise level: Emission at workplace PFAFF 471 and 491 models A + B n = 2200 spm: ..........80 dB(A) PFAFF 471 and 491 models B/C n = 2000 spm: ..........78 dB(A) PFAFF 474 model B n = 2200 spm: ..............81 dB(A) PFAFF 474 model B/C n = 2000 spm: .............. -
Page 12: Pfaff 471, 474, 491
Needles and threads Needle system Model Thread strength Needle size Needle system for the (Nm) max. PFAFF 474 PFAFF 471 synthetic 1/100 mm and 491 60/3 40/3 134 - 35 20/3 134 - 35 or similar strengths of other types of thread Possible models and subclasses Model A ................ -
Page 13: 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 14: 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 15: 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 16: Controls
Controls Controls On/off switch on machines with mini-stop motor without edge trimmer -725/.. or -726/.. The machine is switched on or off by pressing the on/off switch 1. The illuminated diode 2 controls the machine operation Switch 1 on: Diode on = Machine ready for operation Diode flashes... -
Page 17: Button On Machine Head (Only On Machines With -911
Controls Button on machine head (only on machines with -911/..) If button 1 is operated during sewing, the machine switches to reverse sewing. Fig. 7 - 03 Pedal Neutral position Sewing Raise roller presser (on machines with -910/..) Trim sewing threads (on machines with -900/..) Fig. -
Page 18: Lever For Lifting Roller Presser
Controls Lever for lifting roller presser The roller presser can be raised by turning lever 1. Fig. 7 - 05 Knee lever The roller presser can be raised by pressing the knee lever 1 in the direction of the arrow. Fig. -
Page 19: Key For Setting Stitch Length
Controls Key for setting stitch length The stitch length is set by pressing key 1 and turning the balance wheel (see Chapter 9.08 Setting the stitch length). Fig. 7 - 07 Swing out roller presser When the roller presser is raised, it can be swung out by pulling it lightly downwards. -
Page 20: Edge Trimmer -725/04 For 471
Controls Edge trimmer -725/04 for 471 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 21: Edge Trimmer -725/04 For 474 And 491
Controls Edge trimmer -725/04 for 474 and 491 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 22: Edge Trimmer -726/05 For 491
Controls Edge trimmer -726/05 for 491 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 23: 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 24: 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 the tilt lock 1, provided in the accessories, using screw 2. Do not operate the machine without tilt lock 1. -
Page 25: Fitting The V-Belt Guard
Installation and commissioning Fitting the top v-belt guard .01.04 Attach belt guard 1 with screws 2 and 3. Place spacing sleeve 4 between belt guard 1 and the machine housing. Attach belt guard 5 with screws 6 and 7. Place spacing sleeve 4 between belt guard 5 and the machine housing. -
Page 26: Fitting The Synchronizer
Installation and commissioning Fitting the synchronizer .01.06 Attach position stop 1 using screws 2. Push synchronizer 3 onto the shaft so that the position stop 1 is in the groove of the synchronizer (see arrow). Slightly tighten screws 4. Insert the synchronizer plug in the connection socket of the control box. -
Page 27: 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 10 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 28: Setting Up
Loosen screw 2 and insert the needle as far as possible. The long groove must face to the right on model 471 and to the left on model 491. Tighten screw 2 and swing roller presser 1 back into position. -
Page 29: Inserting The Needle On Model 474
Setting up Inserting the needle on model 474 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 30: 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 31: Removing/Inserting The Bobbin Case
Setting up Removing/Inserting the bobbin case Turn the machine off! 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. 474 is shown in Fig. -
Page 32: Threading The Needle Thread And Regulating Its Tension On Model 471/491
Tilt up the eye guard 1. Thread the needle thread as shown in Fig. 9-06. On model 471 the needle is threaded from the right to the left, and on model 491 from the left to the right. Adjust the needle thread tension by turning milled screw 2. - Page 33 Setting up Threading the needle thread and regulating its tension on model 474 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.
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Page 34: Setting The Stitch Length
Setting up Setting the stitch length Fig. 9 - 08 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 35: Care And Maintenance
Care and maintenance Care and maintenance Clean ............daily, more frequently if in continuous operation Oil level (thread lubrication) ............. daily, before operation Oil the hook ..................daily, before operation Lubricate the bevel gears ................. once a year Check/adjust air pressure ..............daily, before operation Clean air filter of air-filter/lubricator .............. -
Page 36: Oiling The Hook
Control the oil level before each use. There must always be oil in the reservoir. If necessary, fill oil up to mark 2 through hole 1. We recommend PFAFF thread lubricating oil, Order No. 280-1-120 217. Fig. 10 - 03 10 - 2... -
Page 37: 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. 10 - 3... -
Page 38: Checking/Adjusting The Air Pressure
Care and maintenance 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. -
Page 39: Adjustment
Adjustment Adjustment Notes on adjustment All adjustments in these adjustment instructions are based on a completely installed machine and must only be carried out by appropriately trained specialists. Covers on the machine, which have to be removed and replaced for checks and adjustment work, are not mentioned here. -
Page 40: Adjusting The Basic Machine
Adjustment Adjusting the basic machine Adjusting the synchronizer .04.01 Requirements 1. When sewing is interrupted, the machine must be in a position 5 mm before BDC of the needle bar. 2. After thread trimming the machine must be in the position TDC of the take-up lever. Fig. -
Page 41: Needle Position In Sewing Direction On The Pfaff 471 And 491
Adjustment 11.04.02 Needle position in sewing direction on the PFAFF 471 and 491 Requirement With the stitch length set at its minimum, the needle should be positioned in the centre of the needle hole, as seen in the direction of sewing. -
Page 42: Needle Position In Sewing Direction On The Pfaff 474
Adjustment Needle position in sewing direction on the PFAFF 474 04.03 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. -
Page 43: Preliminary Adjustment Of The Needle Height
Adjustment Preliminary adjustment of the needle height 04.04 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. 22 mm Fig. 11 - 04 Adjust needle bar 1 (screw 2), without turning it, according to the requirement. 11 - 5... -
Page 44: Needle Rise, Hook Clearance, Needle Height And Needle Guard On The Pfaff 471
Adjustment Needle rise, hook clearance, needle height and needle guard on the PFAFF 471 04.05 Requirement With the needle bar positioned 1.8 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 45 Adjustment 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 according to Requirement 3. When the hook is replaced, care must be taken to see that markings 9 and 10 are on the same side.
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Page 46: Needle Rise, Hook Clearance, Needle Height And Needle Guard On The Pfaff 474
Adjustment Needle rise, hook clearance, needle height and needle guard on the PFAFF 474 04.06 Requirement With the needle bar positioned 1.8 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 47 Adjustment 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.
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Page 48: Needle Rise, Hook Clearance, Needle Height And Needle Guard On The Pfaff 491
Adjustment Needle rise, hook clearance, needle height and needle guard on the PFAFF 491 .04.07 Requirement With the needle bar positioned 1.8 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 49 Adjustment Adjust needle guard 6 according to Requirement 3. When the hook is replaced, care must be taken to see that markings 9 and 10 are on the same side. 11 - 11...
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Page 50: Needle Position Crosswise To Sewing Direction On The Pfaff 471
Adjustment Needle position crosswise to sewing direction on the PFAFF 471 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 51: Needle Position Crosswise To Sewing Direction On The Pfaff 474
Adjustment Needle position crosswise to sewing direction on the PFAFF 474 .04.09 Requirement As seen crosswise to the sewing direction, the needles must penetrate in the centre of their needle holes. Fig. 11 - 09 Adjust feed wheel post 1 (screws 2, on both sides of the post) according to the requirement. -
Page 52: Needle Position Crosswise To Sewing Direction On The Pfaff 491
Adjustment Needle position crosswise to sewing direction on the PFAFF 491 04.10 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. -
Page 53: Height Of The Bobbin-Case Opener
Adjustment Height of the bobbin-case opener 04.11 Requirement The top edges of the bobbin-case opener 1 and the bobbin case base 3 must be level. Fig. 11 - 11 Adjust the bobbin-case opener 1 (screws 2) according to the requirement. Repeat the adjustment on the right-hand post for the 474. -
Page 54: Bobbin-Case Opener Stroke
Adjustment Bobbin-case opener stroke 04.12 Requirement When the bobbin-case opener has pushed the bobbin case down as far as possible, the tip of the bobbin case must be 0.3 - 0.5 mm from the rear edge of the needle plate recess. 0.3 - 0.5 mm Fig. -
Page 55: Height Of The Feed Wheel On The Pfaff 471
Adjustment Height of the feed wheel on the PFAFF 471 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 56: Height Of The Feed Wheel On The Pfaff 491
Adjustment Height of the feed wheel on the PFAFF 474 .04.14 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 57 Adjustment Height of the feed wheel on the PFAFF 491 .04.15 Requirement The feed wheel should protrude from the needle plate by tooth height (approx. 0.8 mm) Fig. 11 - 15 Swing out the roller presser. Loosen screws 1. Adjust eccentric 3 (fastening screw accessible through hole 2) according to the requirement.
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Page 58: Stitch Length Control Eccentric
Adjustment Stitch length control eccentric .04.16 Requirement When the needle (with maximum stitch length set), coming from TDC, is 3 mm above the needle plate, the crank 3 must have reached its front point of reversal. Fig. 11 - 16 Set the maximum stitch length. -
Page 59: Stitch Length Scale Disk
Adjustment Stitch length scale disk .04.17 Requirement When the stitch length control 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. -
Page 60: Shaft Crank To Feed Wheel Drive
Requirement When the maximum stitch length is set, the linkage rod 3, or linkage rods 3 and 4 on the models 471 and 491, must be able to move freely when the balance wheel is turned. PFAFF 471 PFAFF 491 PFAFF 474 Fig. -
Page 61: Shaft Crank To Roller Presser Drive
Adjustment Shaft crank to roller presser drive .04.19 Requirement When the maximum stitch length is set, the linkage rods 3 and 4 must be able to move freely at their left and right point of reversal when the balance wheel is turned. Fig. -
Page 62: Clearance Between Roller Presser And Feed Wheel
Adjustment Clearance between roller presser and feed wheel 04.20 Requirement When the presser bar lifter is raised, the clearance between the roller presser and the feed wheel must be 7 mm. Fig. 11 - 20 Raise the presser bar lifter. Adjust the presser bar 1 (screws 2) according to the requirement. -
Page 63: Roller Presser
Adjustment Roller presser 04.21 Requirements When the roller presser 1 is touching the feed wheel 5 it must 1. be parallel to feed wheel 5, as seen in the direction of sewing, 2. be in the centre of the needle (on model 474 the left needle), as seen in the direction of sewing, 3. -
Page 64: Stitch Length On Stitch Length Scale
When the stitch length is set at "3", and after the needle has entered a strip of leather 11 times, the total length from the first to last needle penetration must be 30 mm. PFAFF 471 PFAFF 491 PFAFF 474 Fig. -
Page 65: Synchronization Of Roller Presser And Feed Wheel
Adjustment Synchronization of roller presser and feed wheel 04.23 Requirement After 21 needle penetrations in a strip of leather the total length from the first to the last penetration should be the same, both in the lower and the upper leather layer. Fig. -
Page 66: Retainer (Only On Model 474)
Adjustment Retainer (only on model 474) .04.24 Requirements The retainer 1 must 1. be as close as possible to the needle, as seen in the direction of sewing and 2. be in the centre of the needle, as seen crosswise to the direction of sewing. 3. -
Page 67: Knee Lever
Adjustment Knee lever 04.25 Requirements 1. Before the roller presser rises, the knee lever must still have a slight play. 2. When the knee lever is raised as far as possible, the lever for the roller presser must drop automatically. 3. -
Page 68: Needle Thread Tension Release
Adjustment Needle thread tension release 04.26 Requirements 1. When 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. 0.5 mm Fig. -
Page 69: Thread Check Spring
Adjustment Thread check spring 04.27 Requirement 1. The movement of thread check spring 5 must be completed when the needle point enters the material ( spring stroke approx. 7 mm). Fig. 11 - 27 Position rest 1 (screw 2) according to requirement 1. To adjust the spring tension, turn screw 3 (screw 4). -
Page 70: Bobbin Winder
Adjustment Bobbin winder 04.28 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 71: Pressure Of Roller Presser
Adjustment Pressure of roller presser 04.29 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. 11 - 33... -
Page 72: Re-Engage Safety Coupling
Adjustment Re-engage safety coupling 04.30 The coupling 1 is set by the manufacturer. When the thread jams, the coupling 1 disengages in order to avoid damage to the hooks. A description of how to engage the coupling follows. Fig. 11 - 30 Remove jammed thread. -
Page 73: Adjusting The Edge Trimmer -725/04
Adjustment Adjusting the edge trimmer -725/04 Position of the knife holder on model 471 .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 74 Adjustment Position of the knife holder on models 474 and 491 .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. 11 - 32 Switch off the machine and engage the edge trimmer.
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Page 75: Knife Stroke On Model 471
Adjustment Knife stroke on model 471 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. 11 - 33 Turn eccentric 1 (screws 2) so that the marking of the desired cutting stroke is opposite the marking on clamp collar 3. -
Page 76: Knife Stroke On Models 474 And 491
Adjustment Knife stroke on models 474 and 491 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. 11 - 34 Adjust crank 1 (nut 2) in slotted lever 3 according to the requirement. 11 - 38... -
Page 77: Cutting Stroke On Model 471
Adjustment Cutting stroke on model 471 .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 78: Cutting Stroke On Models 474 And 491
Adjustment Cutting stroke on models 474 and 491 .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 79: Knife Position
Adjustment Knife position .05.07 Requirement 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. 11 - 37 Adjust screw 1 (screw 2) according to the requirements. Carry out a cutting test and repeat adjustment if necessary. -
Page 80: Adjusting The Thread Trimmer -726/05 On Model 491
Adjustment Adjusting the thread trimmer -726/05 on model 491 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. 11 - 38 Switch off the machine and engage the edge trimmer. -
Page 81: Knife Position Crosswise To Sewing Direciton
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. 11 - 39 Switch off the machine and engage the edge trimmer. Bring the knife into a vertical postion by turning milled screw 1. -
Page 82: 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. 11 - 40 Switch off the machine and engage the edge trimmer. Adjust milled screw 1 according to the requirement. -
Page 83: 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 84: 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. 11 - 42 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 85: Adjusting The Thread Trimmer -900/53
Adjustment Adjusting the thread trimmer -900/53 Removing the cutter 07.01 Fig. 11 - 43 Open post cover 1 and unscrew post cover plate 2 ( screws 3 ). Loosen screw 4. Swing out bobbin case base 5 by hand and hold it in this position. Remove bolt 6. -
Page 86: Control Cam With Respect To Bobbin Opener And Tripping Lever
Adjustment Control cam with respect to bobbin opener and tripping lever 07.02 Requirement 1. Control cam 2 must be touching bearing collar 3. 2. The roller of tripping lever 6 must fall slightly into the path of control cam 2. Fig. -
Page 87: Radial Position Of The Tripping Lever
Adjustment Radial position of the tripping lever 07.03 Requirement With the tripping lever 3 in resting position, there must be a clearance of 0.3 mm between its roller and the circumference of the control cam 4. Fig. 11 - 45 Move solenoid carrier 1 (nuts of screws 2) in accordance with the requirement. -
Page 88: Engaging Solenoid
Adjustment Engaging solenoid 07.04 Requirement With the thread trimmer switched on, the magnet core must still be positioned at a distance of 1 mm before its lower stop. Fig. 11 - 46 Bring the needle bar to BDC and activate the tripping lever by hand. Push solenoid housing 1 (screw 2) up as far as possible and then move it in accordance with the requirement. -
Page 89: Cutter Drive Lever
Cutter drive lever 07.05 Requirements 471 and 474 When the thread trimmer is in its resting position, the distance between cutter drive lever 4 and the bearing collar of the lever 5 must be approx. 0.5 mm. The top edge of screw 1 must be approx. 9 mm from the recess of the cast case. -
Page 90: Control Cams For Bobbin Opener And Cutter (Using Adjustment Gauge)
Adjustment Control cams for bobbin opener and cutter 07.06 (using adjustment gauge) Requirement With the needle bar at BDC, both control cams must be positioned in such a way that 1. adjustment gauge 5 can be slid into the grooves of both control cams, 2. -
Page 91: Radial Position Of The Control Cam In Relation To The Bobbin Opener
Adjustment Radial position of the control cam in relation to the bobbin opener 07.07 (adjustment without gauge) Requirement The retracting motion of the bobbin opener must begin when the needle bar is 4 mm after BDC. Fig. 11 - 49 Activate the tripping lever by hand. -
Page 92: Control Cam For Cutter (Adjustment Without Gauge)
Adjustment Control cam for cutter 07.08 (adjustment without gauge) Requirements 1. The cutting movement must begin when the needle bar is positioned 0.6 mm past TDC. 2. There must be a distance of 9 mm between control cams 2 and 4. 9 mm Fig. -
Page 93: Cutter Control Lever For The Control Cam Of The Cutter
Adjustment Cutter control lever for the control cam of the cutter 07.09 Requirements At the left point of reversal of the rock shaft 3 1. the cylinder of control lever 4 and of reversing lever 5 must be positioned at the centre of the control cam 6;... -
Page 94: Cutter Return Lever
Adjustment Cutter return lever 07.10 Requirement When the roller of tripping lever 3 is exactly at the point of the trip of control cam 2 the maximum distance between the roller of return lever 4 and control cam 2 must be 0.2 mm. Fig. -
Page 95: Cutter Return Control
Adjustment Cutter return control 07.11 Requirement 1. When the point of the trip of control cam 1 is exactly at the roller of tripping lever 2 and trip 3 is touching the beginning of the angular edge of guide plate 5 (see arrow), there must be a clearance of approx. -
Page 96: Fitting The Cutter
Adjustment Fitting the cutter 07.12 Requirement 1. The pin of bolt 4 must protrude into the cam tracks of the cutter halves. 2. The cutter must work with as little lateral play as possible. Fig. 11 - 54 Swing out driving rod 1. Swing out bobbin opener 2 by hand and hold it. -
Page 97: Eccentric Sleeve
1. In its starting position the cutter must be flush with the contour of the needle plate. 2. The cutter must lightly touch the needle plate and the eccentric sleeve 2. PFAFF 491 Fig. 11 - 55 Loosen screw 1 enough so that eccentric sleeve 2 can still be turned. -
Page 98: Cutter Driving Rod
2. At the TDC of the driving rod 2 there must be a safety clearance of at least 0.3 mm between pin 5 and the top end of the cam guide. PFAFF 491 Fig. 11 - 56 Bring the needle bar to BDC and activate the engaging lever by hand. -
Page 99: Cutter Function Test
Adjustment Cutter function test 07.15 Requirement 1. The threads must be cut neatly. 2. After being trimmed, the bobbin thread must be held securely by the thread trapper. Fig. 11 - 57 Turn the machine on. Sew a few stitches and turn the on/off switch off. Activate the engaging lever by hand and close the post cover while ensuring that pressure disk 1 is inserted into the post cap. - Page 100 Adjustment When the cutter is moving forward, the thread trapper must first trap and hold the threads reliably on the cutter (if necessary adjust the thread trapper as required after loosening retaining screw 4). As the process continues, both the bobbin thread and the part of the thread loop closest to the cutter, which is held by the catching lug must be cut perfectly.
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Page 101: Tension Release (Only On Machines With Thread Tension Control -906/10)
Adjustment 11.08 Tension release (only on machines with thread tension control -906/10) Requirement When the magnets 1 are activated, the tension discs 3 must be at least 0.5 mm apart. Fig. 11 - 58 Adjust lever 1 according to the requirement. Using parameter it is possible to set the moment when the tension is released (see Chapter 11.10 Parameter settings). -
Page 102: Adjustment Of Backtacking Mechanism -911
Adjustment Adjustment of backtacking mechanism -911/.. Needle in needle hole (only for PFAFF 471 and 491) 09.01 Requirement When the maximum stitch length is set, the needle must be the same distance from the inside edge of the needle hole, both for forward and reverse stitch. -
Page 103: Coupling For Roller Presser Drive
Adjustment Coupling for roller presser drive 09.02 Requirement There must be a distance of 3 mm between coupling half 1 and locking disc 3 of the drive mechanism. 3 mm Fig. 11 - 60 Adjust coupling half 1 (screw 2) according to the requirement. 11 - 65... -
Page 104: Bevel Gears For Feed Wheel Drive (On The Pfaff 471 And 474)
Adjustment Bevel gears for feed wheel drive (on the PFAFF 471 and 474) 09.03 Requirements 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. -
Page 105: Bevel Gear Play (On The Pfaff 471 And 474)
Adjustment Bevel gear play (on the PFAFF 471 and 474) 09.04 Requirements 1. When sewing forwards, there must be a slight play between bevel gears 6 and 7. 2. When sewing backwards, there must be a slight play between bevel gears 6 and 8. -
Page 106: Bevel Gears For Feed Wheel Drive (On The Pfaff 491)
Adjustment Bevel gears for feed wheel drive (on the PFAFF 491) 09.05 Requirements 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. -
Page 107: Bevel Gear Play (On The Pfaff 491)
Adjustment Bevel gear play (on the PFAFF 491 09.06 Requirements 1. When sewing forwards, there must be a slight play between bevel gears 6 and 7. 2. When sewing backwards, there must be a slight play between bevel gears 6 and 8. -
Page 108: Parameter Settings For The Quick-Ministop Motor
Adjustment Parameter settings for the Quick-Ministop Motor Parameters can be set on the operating panel via display. Group Parameter Significance Setting Standard value l = yes ll = no Max. speed 100 - 2800 2800 Cutting speed 1 30 - 300 Needle position 0 - 191 Needle reference position... - Page 109 Notes...
- Page 110 G.M. PFAFF KAISERSLAUTERN I N D U ST R I E M A S C H I N E N 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...