Pfaff 918 U Instruction Manual
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Industrial
918 U
938 U
INSTRUCTION MANUAL
This instruction manual applies to machines from the
following serial numbers onwards:
# 2 671 899
296-12-18 759/002
Betriebsanleitung engl. 06.09

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Summary of Contents for Pfaff 918 U

  • Page 1 ® Industrial 918 U 938 U INSTRUCTION MANUAL This instruction manual applies to machines from the following serial numbers onwards: # 2 671 899 296-12-18 759/002 Betriebsanleitung engl. 06.09...
  • Page 2 This Instruction Manual is valid for all models and subclasses listed in the chapter "Specifications ". 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

    Contents Contents .................Chapter – Page Safety ........................... 1 - 1 Regulations ........................1 - 1 General notes on safety ....................1 - 1 Safety symbols ......................1 - 2 Important notes for the user ..................1 - 2 Notes for operating and technical staff ................. 1 - 3 .05.01 Operating staff ......................
  • Page 4: Contents

    Removing/inserting the bobbin case ................9 - 3 Threading the bobbin case, adjusting the thread tension ..........9 - 3 .04.01 PFAFF 938 U without thread trimmer ................9 - 3 .04.02 PFAFF 938 U with thread trimmer ................9 - 4 .04.03...
  • Page 5 Contents Contents .................Chapter – Page .05.03 Parallel guiding of the needle bar ................12 - 5 .05.04 Locking lever ....................... 12 - 6 .05.05 Zero stitch and zigzag stitch scale ................12 - 7 .05.06 Centering the needle in the needle hole (crosswise to sewing direction) ....12 - 8 .05.07 Zigzag stitch width ......................
  • Page 6: Safety

    Safety Safety Regulations This machine is constructed in accordance with the European regulations indicated in the conformity and manufacturer's declarations. In addition to this instruction manual, please also observe all generally accepted, statutory and other legal requirements, including those of the user's country, and the applicable pol- lution control regulations! The valid regulations of the regional social insurance society for occupational accidents or other supervisory authorities are to be strictly adhered to!
  • Page 7: Safety Symbols

    The user must ensure that none of the safety devices are removed nor put out of work-ing order. The user must ensure that only authorized persons operate and work on the machine. For further information please refer to your PFAFF agency. 1 - 2...
  • Page 8: Notes For Operating And Technical Staff

    Safety Notes for operating and technical staff Operating staff .05.01 Operating staff are the persons responsible for setting up, operating and cleaning the machine and for eliminating any malfunctioning in the sewing area. The operating staff is obliged to observe the following points: ●...
  • 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! Fig.
  • Page 10: Proper Use

    Proper use Proper use The PFAFF 918 U is a high-speed zigzag sewing machine with bottom feed, a large hook and mechanical shift from zigzag to 3-stitch zigzag. The PFAFF 938 U is a high-speed zigzag sewing machine with bottom feed and mechanical shift from zigzag to 3-stitch zigzag.
  • Page 11: Specifications

    Specifications ▲ Specifications Stitch type: ..................304 (zigzag lockstitch) Needle system: ......................438 Needle size in 1/100 mm: Model A: ........................60 - 70 Model B: ......................... 80 - 100 Effective balance wheel diameter: ................65 mm Presser foot clearance: ....................7 mm Clearance width: ....................
  • Page 12: 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 13: 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 14: 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 15: Controls

    Controls Controls Main switch ● The machine is switched on or off by turning the main switch 1 . Fig. 7 - 01 Keys on the machine head (only on machines with Quick-flange motor) ● As long as key 1 is pressed during sewing, the machine sews in reverse.
  • Page 16: Pedal

    Controls Pedal Neutral position Sewing Raise presser foot Trim thread Fig. 7 - 03 Lever for raising presser foot ● The presser foot is raised by turning lever 1. Fig. 7 - 04 7 - 2...
  • Page 17: Adjustment Lever For Zigzag Stitch And Needle Position

    Controls Adjustment lever for zigzag stitch and needle position ● The zigzag stitch adjustment lever 1 is used for adjusting the width of the zigzag stitch. ● To change the position of the adjustment lever, the locking lever 2 must be pressed against the adjustment lever 1 .
  • Page 18: Stitch Length Adjustment Wheel

    Controls Stitch length adjustment wheel ● The stitch length can be adjusted by turning the stitch length adjustment wheel 1 . The stitch length setting can be read on scale 2 . Fig. 7 - 07 Adjustment wheel for multi-stitch and zigzag stitch Before sewing begins, make sure that adjustment wheel 1 is locked in position! Only switch...
  • Page 19: Control Panel

    The control panels switches on all LCD- segments and the horn automatically for a short time during the power-on phase, after which the lettering PFAFF appears on the display, until the higher-ranking control unit sends commands to the control panel.
  • Page 20: Darning Program

    Controls Start backtacks ● If this key is pressed, the backtacks at the beginning of the seam (start backtacks) are switched on or off. The number of forward stitches (A) or reverse stitches (B) for the start backtacks can be changed by pressing the +/- key underneath. To convert from double backtack to single backtack set the number of stitches for the corresponding seam section at zero.
  • Page 21: 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 22: Mounting The Upper V-Belt Guard / Fitting The Machine Cover

    Installation and commissioning Mounting the upper V-belt guard / Fitting the machine cover .01.02 ● Slide the left and right halves of the V- belt guard into place with the slots behind the heads of screws 1 and 2 . ●...
  • Page 23: Fitting The Quick-Flange Motor

    Installation and commissioning Fitting the Quick-flange motor. Fig. 8 - 04 ● Loosen screws 1 and remove toothed belt wheel 2 from the motor shaft 3 . ● Attach bearing plate 4 to the motor 5 with screws 6 as shown in Fig. 8-04. ●...
  • Page 24: Connect The Plug-Type Connections And Earth Cable Of The Quick-Flange Motor

    Installation and commissioning Connect the plug-type connections and earth cable of the Quick-flange motor. Fig. 8 - 06 ● Connect all the plugs 1-5 to the control box as labelled. ● Screw the earth cable from the sewing head and from main switch 6 to earth point A . ●...
  • Page 25: Commissioning

    Installation and commissioning Commissioning ● Examine the machine, in particular the electric cables and pneumatic connection tubes for any damage. ● Clean the machine thoroughly and then oil it. ● Have qualified personnel check whether the machine can be operated with the available voltage and whether it is connected properly in the terminal box.
  • Page 26: Basic Setting Of The Machine Drive Unit (Only On Machines With Quick-Flange Motor)

    Installation and commissioning Basic setting of the machine drive unit (only on machines with Quick-flange motor) ● Switch on the machine. ● Press TE/Speed key twice to call up the input mode. 101 on ● By pressing the corresponding +/- key, call up parameter "798" and select service level "C"...
  • Page 27 Installation and commissioning ● Sew one stitch by operating the pedal. ● Turn the balance wheel in the direction of sewing until the tip of the needle is level with the top edge of the needle plate. ● By pressing the corresponding +/- key, select parameter "702". ●...
  • Page 28: Mounting/Connecting The Start Inhibitor (Only On Machines With Quick-Flange Motor)

    Installation and commissioning Mounting/connecting the start inhibitor (only on machines with Quick-flange motor) 92-015 Fig. 8 - 09 ● For machines delivered without a table, the plate 1 from the accessories should be mounted under the table top, so that the switch lug 2 is resting on plate 1 when the sewing head is in an upright position.
  • Page 29: Setting Up

    Setting up Setting up All instructions and regulations in this instruction manual must be observed. Special attention must be given to all safety regulations! All setting-up work must only be done by personnel with the necessary training. For all setting-up work the machine must be isolated from its power supply by turning off the on/off switch or removing the machine plug from the electric power socket! Inserting the needle...
  • Page 30: Winding The Bobbin Thread; Adjusting The Primary Thread Tension

    Setting up Winding the bobbin thread; adjusting the primary thread tension Fig. 9 - 02 ● Place an empty bobbin 1 onto bobbin winder spindle 2 . ● Thread the bobbin as shown in Fig. 9 - 02 and wind it clockwise around bobbin 1 a few times.
  • Page 31: Removing/Inserting The Bobbin Case

    Fig. 9 - 03 11-04 Threading the bobbin case, adjusting the thread tension PFAFF 938 U without thread trimmer .04.01 ● Insert bobbin 1 into bobbin case 2 . ● Guide the thread through the slot under spring 3 .
  • Page 32: Pfaff 938 U With Thread Trimmer

    Setting up PFAFF 938 U with thread trimmer .04.02 ● Insert bobbin 1 into bobbin case 2 . ● Guide the thread through the slot under spring 3 . ● Adjust the thread tension by turning screw 4 . When the thread is pulled the bobbin 1 must rotate in the direction of the arrow.
  • Page 33: Threading The Needle Thread / Adjusting The Needle Thread Tension

    Setting up Threading the needle thread / Adjusting the needle thread tension Fig. 9 - 07 Switch off the machine! Danger of injury if the machine is started accidentally! ● Thread the needle thread as show in the above illustration. ●...
  • Page 34: Setting The Zigzag Stitch And The Stitch Position

    Setting up Setting the zigzag stitch and the stitch position ● Set the zigzag stitch width by turning the zigzag lever 1 . ● To vary the adjustment press catch 2 against zigzag lever 1 . ● The setting can be read from scale 3 . ●...
  • Page 35: Adjusting The Multi-Stitch Or The Zigzag Stitch (Only On Machines With Quick-Flange Motor)

    Setting up Adjusting the multi-stitch or the zigzag stitch (only on machines with Quick-flange motor) Changing from zigzag stitch to multi-stitch .08.01 Before sewing begins, make sure that adjustment wheel 1 is locked in position! Only switch over when the machine is at a standstill! Danger of machine damage! ●...
  • Page 36: Adjusting The Multi-Stitch Or The Zigzag Stitch (On Machines With An External Motor)

    Setting up Adjusting the multi-stitch or the zigzag stitch (on machines with an external motor) Changing from zigzag stitch to multi-stitch .09.01 Before sewing begins, make sure that adjustment wheel 1 is locked in position! Only switch over when the machine is at a standstill! Danger of machine damage! ●...
  • Page 37: Entering The Start And End Backtacks

    Setting up Entering the start and end backtacks ● Switch on the machine. ● If necessary switch off the "darning seam" or "counted seam" function, see Chapter 10.01 Darning program or Chapter 10.02 Counted seam . ● By pressing the corresponding +/- key ("A") select the desired value for the number of forward stitches (A) of the start backtack.
  • Page 38: Sewing

    Sewing Sewing (only on machines with Quick-flange motor) In the sewing mode all relevant settings for the sewing operation are displayed. Functions can be switched on or off by pressing a key. Values for start and end backtacks or stitch placement can be changed directly.
  • Page 39: Darning Program

    Sewing Darning program 15 15 5 1 The corresponding function can be switched on or off directly with the Darning program key. The "counted seam" function is switched off automatically. Several darning programs with different seam sections A and/or B can be selected. The number of required darning programs can be selected by operating the +/- key 1 .
  • Page 40: Error Messages

    Sewing Error messages If a fault occurs, the text "ERROR" appears on the display, together with an error code and short instructions. An error message is caused by incorrect settings, faulty elements or seam programs as well as by overload conditions. For an explanation of the error codes see Chapter 12.09 Explanation of the error messages.
  • Page 41: Care And Maintenance

    Care and maintenance Care and maintenance Cleaning ............daily, several times by continuous operation ▲ Checking the oil level (hook oil tank) ............. once a year Checking the oil tank(zigzag eccentric lubrication) ......daily, before operation Checking/adjusting the air pressure ........daily, before each operation Cleaning the air filter/lubricator ..........
  • Page 42: Lubricating The Hook

    (see arrow in Fig. 11-03 ). Return the machine to its upright position with both hands. Danger of crushing between machine head and table top! We recommend PFAFF sewing machine oil. Part no. 280-1-120 105. 11 - 2...
  • Page 43: Oiling The Zigzag Drive

    ● Pour in oil until sight glass 2 is full. ● Clean the surface of cover 5, the case and the seal. ● Replace cover 5 and tighten screws 4 . We recommend PFAFF sewing machine oil, part no. 280-1-120 146. 11 - 3...
  • Page 44: Cleaning The Air Filter Of The Air-Filter / Lubricator

    Care and maintenance Cleaning the air filter of the air-filter / lubricator Switch the machine off! Disconnect the air hose at the air-filter / lubricator. To drain water bowl 1: ● Water bowl 1 drains itself automatically when the compressed-air hose is disconnected from the air-filter / lubricator.
  • Page 45: 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 46: Check And Adjustment Aid

    Adjustment Check and adjustment aid By blocking with holes 1 - 5 the required needle bar positions can be fixed exactly. Fig. 12 - 01 ● Turn the balance wheel until the needle bar has approximately reached the required position. ●...
  • Page 47: Adjusting The Basic Machine

    Adjustment Adjusting the basic machine Balancing weight .05.01 Requirement With the needle bar at bdc the largest eccentricity of the balancing weight 1 must be pointing upwards. Fig. 12 - 02 ● Bring the needle bar to b.d.c. ● Adjust the balance weight 1 (screw 2 ) in accordance with the requirement. 12 - 3...
  • Page 48: Centering The Needle In The Needle Hole (In Sewing Direction)

    Adjustment Centering the needle in the needle hole (in sewing direction) .05.02 Requirement With the zigzag setting at "0" and the needle position set at "middle" the needle must enter the center of the needle hole as viewed in the direction of sewing. 92-023 Fig.
  • Page 49: Parallel Guiding Of The Needle Bar

    Adjustment Parallel guiding of the needle bar .05.03 Requirement Guide bar 5 must be parallel to the needle bar. Fig. 12 - 04 ● Bring the needle bar to tdc (hole 2). ● Loosen screws 1,2 and nut 3 . ●...
  • Page 50: Locking Lever

    Adjustment Locking lever .05.04 Requirement The zigzag stitch adjustment lever 3 must be able to be locked in any position. Fig. 12 - 05 ● Loosen screw 2 . ● Press locking lever 1 against the zigzag stitch adjustment lever 3 . ●...
  • Page 51: Zero Stitch And Zigzag Stitch Scale

    Adjustment Zero stitch and zigzag stitch scale .05.05 Requirement With the zigzag stitch set at "0" : 1. the needle bar must not move laterally when the balancewheel is turned and 2. the marking "0" on scale 1 must be at marking 2 . Fig.
  • Page 52: Centering The Needle In The Needle Hole (Crosswise To Sewing Direction)

    Adjustment Centering the needle in the needle hole (crosswise to sewing direction) .05.06 Requirement With the zigzag stitch set at "0" and the needle position setting at "middle" the needle must enter the center of the needle hole as seen across the direction of sewing. 92-022 Fig.
  • Page 53: Zigzag Stitch Width

    Adjustment Zigzag stitch width .05.07 Requirement At the largest zigzag stitch setting, marking 1 must be at the largest zigzag value on scale 2 . Fig. 12 - 08 ● Turn the zigzag stitch adjustment lever 3 in accordance with the requirement . ●...
  • Page 54: Multi-Stitch Movement

    Adjustment Multi-stitch movement .05.08 Requirement 1. When the needle, at its b.d.c., penetrates on the right-hand side, the recess 5 on the control cam 3 should be positioned horizontally towards the rear. 2. The lateral movement of the needle bar should have been completed when the needle penetrates the workpiece (carry out a check with the largest zigzag setting).
  • Page 55: Zigzag Movement

    Adjustment Zigzag movement .05.09 Requirement When the needle bar, moving from its right b.d.c., reaches its t.d.c. (hole 2), it should not carry out any lateral motion when the zigzag stitch width lever 4 is moved to and fro. Fig. 12 - 10 ●...
  • Page 56: Target Positioning Sensor

    Adjustment Target positioning sensor .05.10 Requirement There should be a clearance of 0.2 – 0.3 mm between sensor 1 and control cam 3 . Fig. 12 - 11 ● Adjust sensor 1 (screws 2 ) in accordance with the requirement . 12 - 12...
  • Page 57: Needle Position Adjustment Lever

    Adjustment Needle position adjustment lever .05.11 Requirement The left and right throws of the needle must be the same size at the largest zigzag stitch setting and at the left or right needle position. Fig. 12 - 12 ● Loosen screws 1 and 2 . ●...
  • Page 58: Zero Position Of The Bottom Feed Dog (With Closed Gear Box)

    Adjustment Zero position of the bottom feed dog (with closed gear box) .05.12 Requirement With the stitch length set at "0", the bottom feed dog should not carry out any feeding motion when the balance wheel is turned. Fig. 12 - 13 ●...
  • Page 59: Zeroing The Bottom Feed (With Open Gearbox)

    Adjustment Zeroing the bottom feed (with open gearbox) .05.13 Requirement With the stitch length set at "0" the bottom feed dog must not carry out any feeding motion when the balance wheel is turned. Fig. 12 - 14 ● Switch on the machine. ●...
  • Page 60: Feeding Motion Of The Bottom Feed Dog

    Adjustment Feeding motion of the bottom feed dog .05.14 Requirement With the maximum stitch length set and the needle bar position 1.0 past tdc (hole 4), the bottom feed dog must not move when the reverse feed lever is pressed. Fig.
  • Page 61: Lifting Motion Of The Bottom Feed Dog

    Adjustment Lifting motion of the bottom feed dog .05.15 Requirement With the stitch length set at " 0 " and the needle bar position at 0.25 mm past tdc (hole 3) the bottom feed dog must be at its upper point of reversal. Fig.
  • Page 62: Drive Belt In The Gearbox Housing

    Adjustment Drive belt in the gearbox housing .05.16 Requirement Drive belt 4 must be tightened so that the machine runs freely and the belt sprockets do not have any noticeable play. Fig. 12 - 17 ● Adjust eccentric bearing bush 1 (screw 2 ) in accordance with the requirement and so that drive belt 4 is in the centre of bobbin opener drive wheel 3 .
  • Page 63: Hook Bearing Bracket

    Adjustment Hook bearing bracket .05.17 Requirement The hook shaft must be touching the hook bearing bracket adjustment gauge 1 at the top and the side. 438 - 439 Fig. 12 - 18 ● Loosen screw 3 . ● Swing the bobbin case opener to the right and remove the hook. ●...
  • Page 64: Hook Lubrication

    Adjustment Hook lubrication .05.18 Requirement When the machine is running at full speed, after about 10 seconds a fine oil streak should be visible on a strip of paper held over the needle plate cutout. Fig. 12 - 19 ● Adjust screw 1 in accordance with the requirement . 12 - 20...
  • Page 65: Pre-Adjusting The Needle Height

    Adjustment Pre-adjusting the needle height .05.19 Requirement With the needle bar at tdc (hole 2) the distance between the point of the needle and the needle plate must be 19 mm . 19 mm Fig. 12 - 20 ● Without turning it, adjust the needle bar (screws 1 ) in accordance with the requirement. 12 - 21...
  • Page 66: Needle Rise, Hook-To-Needle Clearance And Bobbin Case Positioning-Finger

    Adjustment Needle rise, hook-to-needle clearance and bobbin case positioning-finger .05.20 Requirement 1. With the needle position set at "middle", the zigzag stitch setting at "0" and the needle bar position 2.0 past bdc (hole 1) the hook point must be in the middle of the needle and the distance between the needle and the hook point must be 0.05 - 0.1 mm .
  • Page 67: Final Adjustment Of The Needle Height

    Adjustment Final adjustment of the needle height .05.21 Requirement With the zigzag stitch set at "0", the needle position set at "left" and the hook point in the middle of the needle, the top edge of the needle eye must be 0.5 mm underneath the hook point.
  • Page 68: Bobbin Case Opener Position

    Adjustment Bobbin case opener position .05.22 Requirement 1. There must be a clearance of 0.5 mm between the top edge of the bobbin case opener and the inner edge of the bottom section of the bobbin case. 2. Between the bobbin case opener finger and the bottom section of the bobbin case opener there must be a clearance of 0.8 mm .
  • Page 69: Bobbin Case Opener Motion

    Adjustment Bobbin case opener motion .05.23 Requirement With the needle bar 2.0 past bdc (hole 1) the bobbin case opener 3 must be at its right point of reversal. Fig. 12 - 24 ● Adjust bobbin opener eccentric 1 (screws 2 ) in accordance with the requirement. 12 - 25...
  • Page 70: Bottom Feed Dog Height

    Adjustment Bottom feed dog height .05.24 Requirement With the stitch length set at "0" and the needle bar position at 0.25 past tdc (hole 3) the bottom feed dog must be in the middle of the needle plate cutout and be touching the feed dog height-adjustment gauge along its entire length.
  • Page 71: Presser Foot To Needle Plate Clearance

    Adjustment Presser foot to needle plate clearance .05.25 Requirement When the hand lever is raised, the needle should penetrate exactly in the "needle hole centre" of the presser foot and the presser foot to needle plate clearance should be 5 mm. 81-038 Fig.
  • Page 72: Presser Foot Pressure

    Adjustment Presser foot pressure .05.26 Requirement Even at top sewing speed the material should be fed without problems. There should be no pressure marks on the material. Fig. 12 - 27 ● Turn screw 1 in accordance with the requirement. The presser foot pressure (screw 1) can be increased ( + ) or reduced ( - ) as required.
  • Page 73: Thread Diverter Pin

    Adjustment Thread diverter pin .05.27 Requirement With the needle bar at bdc the top edge of the thread guide hole must be at the same height as the bottom edge of the thread diverter. Fig. 12 - 28 ● Adjust thread guide bar 1 (screw 2 ) according to the requirement, taking care that it is parallel to the bed-plate.
  • Page 74: Limiting The Knee Lever Stroke

    Adjustment Limiting the knee lever stroke .05.28 Requirement When the knee lever is pressed the hand lever must drop automatically and the presser foot must be just over 7 mm above the needle plate. 81-038 Fig. 12 - 29 ● Place the feed dog gauge under the presser foot with its recess facing downwards. ●...
  • Page 75: Knee Lever Play

    Adjustment Knee lever play .05.29 Requirement When lightly pressing the knee lever there should be a noticeable play between nut 1 and fork 3 . Fig. 12 - 30 ● Adjust nut 1 (nut 2 ) in accordance with the requirement and lock it with nut 2 . 12 - 31...
  • Page 76: Bobbin Winder

    Adjustment Bobbin winder .05.30 Requirement 1. With the bobbin winder engaged the bobbin winder spindle must be turned reliably, but friction wheel 3 must not touch drive wheel 1 when the bobbin winder is switched off. 2. The bobbin winder must disengage automatically when the thread is approx. 1 mm from the edge of the bobbin.
  • Page 77: Adjusting The Thread Trimmer

    Adjustment Adjusting the thread trimmer Axial position of the control cam .06.01 Requirement 1. Roller 5 should be at a distance of 0.3 mm from the control cam 1 . 2. Adjustment ring 3 should be touching the control cam 1 . 0,3 mm 81-048 Fig.
  • Page 78: Preliminary Adjustment Of The Control Cam

    Adjustment Preliminary adjustment of the control cam .06.02 Requirement 1. In the needle rise position (hole 1 ) the roller lever 4 should lock into the corresponding groove of the control cam. 2. The control cam 1 should be touching adjustment ring 3 . 81-049 Fig.
  • Page 79: Position Of The Thread Catcher And Cutting Test

    Adjustment Position of the thread catcher and cutting test .06.03 Requirement When the thread trimmer is in its neutral position, the edge of thread catcher 6 should be flush with the edge of the mounting plate 4 . 81-100 Fig. 12 - 34 ●...
  • Page 80: Readjustment Of The Control Cam

    Adjustment Readjustment of the control cam .06.04 Requirement 1. When the end of the hook guard 3 is level with of the right edge of the bobbin case position finger 4 , the thread catcher 5 should begin moving forwards. 2.
  • Page 81: Needle Thread Tension Release

    Adjustment Needle thread tension release .06.05 Requirement 1. When solenoids 3 are activated, the tensions disks 4 should be at least 0.5 mm apart. 2. When the thread trimmer is in its neutral position and the sewing foot is positioned on the needle plate, the tension should be fully effective.
  • Page 82: Parameter Settings

    Adjustment Parameter settings Selecting the user level .07.01 ● Switch on the machine. ● Press the TE/Speed key twice to call up the input mode. ● By pressing the corresponding +/- key select the parameter group "798". ● By pressing the corresponding +/- key select the desired user level: "0"...
  • Page 83: Example Of A Parameter Input

    Adjustment Example of a parameter input .07.02 ● Switch on the machine. ● Press the TE/Speed key twice to select the input mode. 101 on ● By pressing the corresponding plus/minus key select parameter "798" and the user level "B" , see Chapter 12.09.01 Selecting the user level. ●...
  • Page 84: List Of Parameters

    Adjustment List of parameters .07.03 Control panel key tone A, B, C (0FF = AUS, ON = EIN) Speed display B, C (0FF = AUS, ON = EIN) Max. speed B, C 300 - 6000 4500 Cutting speed B, C 60 - 500 Bobbin thread control A, B, C...
  • Page 85: Reset / Cold Start

    Adjustment Reset / Cold start After selecting the reset menu, by pressing the corresponding key it is possible to delete seam parameters, delete seam programs and to carry out a cold start. ● Press and hold "+" on keys A and D and switch on the machine, see Chapter 7.01 Main switch.
  • Page 86: Explanation Of The Error Signals

    Adjustment Explanation of the error signals Signal Description E001 Pedal not in neutral position E009 Start inhibitor during standstill E010 Incorrect machine class E062 Short circuit 24V E063 Overload mains supply circuit E064 Network monitoring E065 Extint low in operation E066 Short circuit E067...
  • Page 87: 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 88: Wearing Parts

    You can order a detailed spare parts list for the complete machine under part no. 296-12-18 759. 91-100 296-25 (3x) 91-701 179-15 11-108 174-´25 System 438 11-108 174-15 (2x) PFAFF 918 U 91-268 676-91 C 91-268 674-91 A B 91-168 178-05 91-265 227-05 (3x) 91-268 680-05 C 91-268 679-05 A B...
  • Page 89 Wearing parts PFAFF 938 U 91-265 225-91 91-168 144-05 91-265 227-05 (3x) 91-167 595-05 11-174 912-15 (2x) 91-175 690-05 91-225 227-05 (3x) 91-009 026-05 91-167 597-91 91-000 250-15 91-000 390-05 99-137 151-45 91-171 049-05 91-171 042-05 91-168 498-15 91-700 249-15...
  • Page 90: Circuit Diagrams

    Circuit diagrams Circuit diagrams Reference list for circuit diagrams 91-191 477-95 Controller Quick P40 ED Control panel S1 Sewing head identification Initiator zig-zag stitch control Sewing lamp LED Stitch counter Sewing motor Main switch Pedal set value transmitter Start inhibitor key Manual backtacking Needle position change key Single stitch key...
  • Page 91 Circuit diagrams Reference list for circuit diagrams 91-191 478-95 Controller Quick P50 ED Control panel S2 Sewing head identification Initiator zig-zag stitch control Sewing lamp LED Stitch counter Sewing motor SRP linear motor Main switch Pedal set value transmitter SRP knee switch Start inhibitor key Manual backtacking Needle position change key...
  • Page 92 General plan – circuit diagrams 91-191 477-95 Version 05.11.03 Part 1 14 - 3...
  • Page 93 91-191 477-95 General plan – circuit diagrams Part 2 Version 05.11.03 14 - 4...
  • Page 94 General plan – circuit diagrams 91-191 477-95 Version 05.11.03 Part 3 14 - 5...
  • Page 95 91-191 478-95 General plan – circuit diagrams Part 1 Version 05.11.03 14 - 6...
  • Page 96 General plan – circuit diagrams 91-191 478-95 Version 05.11.03 Part 2 14 - 7...
  • Page 97 91-191 477-95 General plan – circuit diagrams Part 3 Version 05.11.03 14 - 8...
  • Page 98 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...

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