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1245
1246
Instruction manual
This instruction manual applies to machines from the
following serial numbers onwards:
PFAFF 1245 # 527 678
PFAFF 1246 # 527 679
296-12-18 401/002
Betriebsanleitung engl. 01.02

Summary of Contents

  • Page 1

    1245 1246 Instruction manual This instruction manual applies to machines from the following serial numbers onwards: PFAFF 1245 # 527 678 PFAFF 1246 # 527 679 296-12-18 401/002 Betriebsanleitung engl. 01.02...

  • Page 2: Specifications

    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 permission and with written reference to the source.

  • Page 3: Table Of Contents

    Danger ... 1 - 4 Proper use ... 2 - 1 Specifications ... 3 - 1 PFAFF 1245 ... 3 - 1 Possible models and subclasses ... 3 - 1 Max. number of stitches/min PFAFF 1246 ... 3 - 3 Possible models and subclasses ...

  • Page 4: Table Of Contents

    Inserting the bobbin case / Adjusting the bobbin thread tension ... 9 - 3 Threading the needle thread / Adjusting the needle thread tension in the PFAFF 1245 ... 9 - 5 Threading the needle thread / Adjusting the needle thread tension in the PFAFF 1246 ... 9 - 6 Care and maintenance ...

  • Page 5: Table Of Contents

    .04.13 Needle thread tension release ... 11-15 .04.14 Thread check spring ... 11-16 .04.15 Thread check spring on PFAFF 1246 with thread trimmer -900/56 ... 11-17 .04.16 Bobbin winder ... 11-18 .04.17 Presser-foot pressure ... 11-19 Adjusting the thread trimmer -900/56 ... 11-20 .05.01...

  • Page 6: Safety, Directives, General Notes On 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 -including those of the country and all valid environ- mental protection regulations! The regionally valid regulations of the social insurance society for occupational accidents or other supervisory organisations are to be strictly adhered to!

  • Page 7: Safety Symbols, Important Points For The User

    It is the obligation of the operator to ensure that only authorized persons operate and work on the machine. Further information can be obtained at your PFAFF agent. Caution Do not operate without finger guard and safety devices.

  • Page 8: Operating And Specialist Personnel, Operating Personnel, Specialist Personnel, Controls, On/off Switch

    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 9: Danger

    Safety Danger A working area of 1 metre 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 or in the needle plate area while adjusting the machine settings! Objects can become trapped or be slung away! Danger of injury!

  • Page 10

    Safety Fig.1 - 02 Fig. 1 - 03 1 - 5 Do not operate the machine without tilt-back safeguard ! Danger of crushing between upper part and table top! Do not operate the machine without belt guards 4 and ! Danger of injury by the revolving V-belt!

  • Page 11: Proper Use

    The PFAFF 1245 is a single needle, flatbed sewing machine with bottom, top and needle feeds as well as a large vertical hook for sewing lockstitch seams. The machine is designed for commercial use (industry). The Pfaff 1246 is a two-needle, flat bed sewing machine with bottom, top and needle feed as well as vertical sewing hook for lockstitch seams.

  • Page 12

    Stitch type: ... 301 (lockstitch) Needle system: ... 134-35 Needle thickness in 1/100 mm: Model C: ... 110 - 140 Max. thread thickness (synthetic Model C: ... 20/3 Max. stitch length: Model N: ... 6.0 mm Model N8: ... 8.0 mm Handwheel eff.

  • Page 13

    Top feed lift stitch lengths up to 6 mm less than 3.5 mm from 3.5 to 5.5 mm from 5.5 to 7 mm Max. number of Max. number of stitches/min stitches/min lengths from 6 mm to 8 mm 2800 2500 2000 for stitch 2600...

  • Page 14

    Stitch type: ... 301 (lockstitch) Needle system: ... 134-35 Needle thickness in 1/100 mm: Model B: ... 80 - 100 Model C: ... 110 - 140 Max. thread thickness (synthetic Model B: ... 40/3 Model C: ... 20/3 Max. stitch length: Model BN and CN: ...

  • Page 15

    less than 3.5 mm 2700 from 3.5 to 5.5 mm 2400 from 5.5 to 7 mm 1900 2500 2300 2500 2400 2100 2200 1900 1600 1700...

  • Page 16: Disposal Of The Machine

    Disposal of the machine Disposal of machine waste The proper disposal of machine waste is the responsibility of the customer. The materials used on the machines are steel, aluminium, brass and various plastics. The electrical equipment consists of plastics and copper. The machine waste is to be disposed of in accordance with the locally valid environmental protection regulations.

  • Page 17: Transport, Packaging And Storage, Transport To The Customer, Transport Within The Customer's Premises

    Transport packaging and storage Transport to the customer’s premises Within the Federal Republic of Germany, the machine is delivered without packaging. Machines for export are packaged in a crate or wrapped depending on how they are transported. Transport within the customer’s premises The manufacturer carries no liability for transport within the customer’s premises.

  • Page 18: Explanation Of The Symbols

    Explanation of the symbols Explanation of the symbols In the following section of this Instruction Manual, certain tasks or important pieces of information are accentuated by symbols. The symbols used have the following meanings: 6 - 1 Note, information Cleaning, care Lubrication, greasing Servicing, repairing, adjustment, maintenance (only to be carried out by specialist personnel)

  • Page 19

    Fig. 7 - 01 (on machines with subclas -910/01) Fig. 7 - 02 Controls Turn the machine on and off by switching the on/off switch on and off. When the machine is on, the light in the switch is also on. The switch in the illustration can be found on machines with Quick motors.

  • Page 20

    Controls (on machines with automatic presser-foot lifter -910/98) Fig. 7 - 03 Fig. 7 - 04 7 - 2 With the on/off switch on 0 = Machine stop +1 = Sew - 1 = Raise presserfoot - 2 = Trim thread (on machines with thread trimmer) (for machines with backtacking mechanism -911/97) Switch to reverse sewing by pressing...

  • Page 21

    Fig. 7 - 05 Fig. 7 - 06 Controls The sewing foot can be lifted by raising lever . Adjust the stitch length by turning the knurled nut accordingly. Press knurled nut upwards as far as possible (position „R“). 7 - 3...

  • Page 22

    Controls Fig. 7 - 07 Fig. 7 - 08 7 - 4 (on machines with backtacking mechanism -911/97) You can set the length of the reverse stitch as large as is required, independent of the forward stitch. The forward stitch is set with knurled screw knurled screw .

  • Page 23: Mounting And Commissioning The Machine, Mounting, Adjusting The Table-top Height

    Mounting and commissioning the machine The machine must only be mounted and commissioned by qualified personnel! All relevant safety regulations are to be observed! If the machine is delivered without a table, it must be ensured that the frame and the table top which you intend to use can hold the weight of the machine and the motor, even while sewing.

  • Page 24: Adjusting The V-belt Tension, Mounting The Upper V-belt Guard

    Mounting and commissioning the machine Adjusting the V-belt tension 01.02 Fig. 8 - 02 Mounting the upper V-belt guard .01.03 Fig. 8 - 03 8 - 2 Fig. 8 - 02 shows a Quick motor. If another motor is used, proceed as described in the motor’s instruction manual.

  • Page 25: Mounting The Lower V-belt Guard, Mounting Tilt-over Safeguard

    Mounting the lower V-belt guard .01.04 Fig. 8 - 04 Fig. 8 - 04 shows a Quick motor. If another motor is used, proceed as described in the motor’s instruction manual. Mounting tilt-over safeguard 01.05 Fig. 8 - 06 Mounting and commissioning the machine ●...

  • Page 26: Mounting The Spool Holder, Mounting The Sewing Lamp

    Mounting and commissioning the machine Mounting the spool holder .01.06 Fig. 8 - 05 Mounting the sewing lamp 01.07 ● Screw the sewing lamp onto the table top (wood screws 5x35) and have it connected by a specialist. ▲ The sewing lamp is not included in the normal delivery package. 8 - 4 ●...

  • Page 27: Table Top Cutout, Pfaff 1245

    Table top cutout PFAFF 1245 .02.01 Mounting and commissioning the machine Stand position 8 - 5...

  • Page 28: Pfaff 1246

    Mounting and commissioning the machine PFAFF 1246 .02.02 Gestell 8 - 6...

  • Page 29: Care And Maintenance, Commissioning The Machine, Switching The Machine On/off

    Commissioning the machine ● Before commissioning the machine, check the electrical leads and pneumatic hoses for any damage. ● Remove pin 1 of the oil reservoir 2 (Fig. 8 - 06). The pin serves only to protect the machine from damage during transport and must not be used when sewing. ●...

  • Page 30: Preparation

    All regulations and instructions in this Instruction manual are to be observed! Special attention is to be paid to all Notes on Safety! All preparation work is only to be carried out by appropriately trained personnel. Before all preparation work, the machine is to be switched off via the on/off switch or to beseparated from the electricity supply by removing the plug from the mains! Fig.

  • Page 31

    Fig. 9 - 01a Turn the machine off! Use only system 134 - 35 needles! Loosen needle retaining screws . Insert needles as far as it will go (the longitudinal needle groove of the left-hand needle must be pointing to the right and that of the right-hand needle to the left).

  • Page 32

    Fig. 9 - 02 Place an empty bobbin onto bobbin shaft . Thread the bobbin in accordance with and wind it clockwise around bobbin a few times. Switch on the bobbin winder while at the same time pressing bobbin winder spindle and lever .

  • Page 33

    Fig. 9 - 03 Fig. 9 - 04 Turn the machine off! Removing the bobbin case. Open the bed slide. Raise latch and remove bobbin case . Inserting the bobbin case. Insert bobbin case so that it clicks into place. Close latch and close the bed slide.

  • Page 34

    Fig. 9 - 05 Turn the machine off! Thread the machine as shown in Take note that the needle is threaded from the left (see arrow). Adjust the needle thread tension by turning knuled screws ..

  • Page 35

    Fig. 9 - 06 Maschine ausschalten! Thread the machine as shown in . Care must be taken that the left-hand needle is threaded from the right and the right-hand needle is threaded from the left. Adjust the needle thread tension by turning knurled screws .

  • Page 36: General Lubrication

    Check the air pressure ... daily before use Clean the hook compartment ... daily, more often if in continuous operation Check the water container of the air filter ... daily before use General lubrication ... twice a week Lubricate the front parts ... twice a week Check the hook oil-container ...

  • Page 37

    Fig. 10 - 02 Only use oil with a mean viscosity of 22.0 mm /s at 40°C and a density of 0.865 g/cm at 15°C. We recommend PFAFF sewing machine oil. Part no. 280-1-120 144. Fig. 10 - 03...

  • Page 38

    Turn the machine off! Lubricate all bearings marked in Open the bed slide to gain access to oiling point . Pull the knee lever out to the front and lay the machine on its back. Lubricate all bearings marked in Setting the machine upright Hold the machine, press tilt safety device upright position with both hands.

  • Page 39

    Only use oil with a mean viscosity of 22.0 mm /s at 40°C and a density of 0.865 g/cm at 15°C. We recommend PFAFF sewing machine oil. Part no. 280-1-120 144. Turn the machine off! Open cover on the back of the machine.

  • Page 40

    Fig. 10 - 07 Fig. 10 - 08 Before each use of the machine, check the air pressure on gauge . The gauge must display a pressure of If necessary, alter the pressure to this level. To do so, lift button and turn it so that the gauge shows a pressure of Press button...

  • Page 41: Adjustment

    The illustrations in this section show the For the twice, i.e. to the left- and right-hand sewing hooks. This will be pointed out in the respective sections, whereby it is often possible to apply the mirror image of the illustrations. Screwdrivers with blade widths from 2 to 10 mm Screwdrivers with blade widths from 7 to 14 mm Allan keys from 2 to 6 mm...

  • Page 42: Positioning The Feed Dog Across The Direction Of Sewing

    Positioning the feed dog across the direction of sewing 04.01 The bottom feed dog must be the same distance from the left and right side of the needle- plate cutout. Fig. 11 - 01 Loosen screws Laterally align rock shaft Now tighten screws .

  • Page 43: Positioning The Feed Dog In The Direction Of Sewing

    Positioning the feed dog in the direction of sewing 04.02 With the longest stitch set, the bottom feed dog must have the same clearance the front and the back with respect to the needle-plate cutout when feeding both forwards and backwards.

  • Page 44: Height Of The Bottom Feed-dog

    11.04.03 Height of the bottom feed-dog With the stitch length set at „0“ , the bottom feed dog must protrude over the needle plate as high as the teeth when at TDC. Fig. 11 - 03 Set stitch length „0“ . Bring the bottom feed dog to its TDC by turning the handwheel.

  • Page 45: Pre-adjusting The Needle Height

    Pre-adjusting the needle height 04.04 With the needle bar at BDC, the distance between the needle bar and the needle plate must be Fig. 11 - 04 Move needle bar laterally. (screw ) in accordance with the without moving it 11 - 5...

  • Page 46: Centering The Needle In The Needle Hole

    Centering the needle in the needle hole 04.05 With the stitch length set at „0“ , the needle must enter the needle hole exactly in the middle. Fig. 11 - 05 Unscrew vibrating presser Set stitch length „0“ and bring the needle bar to its TDC. Insert a new needle.

  • Page 47: Lifting Motion Of The Bottom Feed-dog

    Lifting motion of the bottom feed-dog 04.06 This adjustment does not apply for machines without a bottom feed lifting phase (without P). 1. With the needle bar at its BDC, the bottom feed dog must be at its TDC. 2. With the longest stitch set, the bottom feed dog must reach the top surface of the needle plate at the same time as the needle point when the handwheel is turned.

  • Page 48: Driving Motion Of The Bottom And Top Feeds

    Driving motion of the bottom and top feeds 04.07 With the longest stitch length set and the needle bar at its BDC, the top and bottom feeds should not move when the reverse-feed lever is activated. Fig. 11 - 07 Set the longest stitch.

  • Page 49: Hook-to-needle Clearance, Needle Rise, Needle Height And Needle Guard

    Hook-to-needle clearance, needle rise, needle height and needle guard 04.08 (On Model 1246 make these adjustments on both sewing hooks.) With the stitch length set at „3“ and the needle rise at on model „B“ and must be true: 1. The distance to the needle must be to the middle of the needle.

  • Page 50

    . in accordance with Bei der PFAFF 1246 ist nach Veränderung des Nadelabstandes unbedingt die Verbindungsstange zum Fadenabschneider (siehe auch neu zu justieren. to rest on...

  • Page 51: Top-feed Stroke

    Top-feed stroke 04.9 At the largest top-feed stroke setting and stitch length „0“ , presser foot presser foot must lift Fig. 11 - 9 Set the largest top-feed stroke and the stitch length at „0“ . Bring presser foot Turn the handwheel in the direction of rotation until vibrating presser foot 2 has reached its highest point.

  • Page 52: Lifting Motion Of The Top Feed

    Lifting motion of the top feed 04.10 When presser foot point of the needle must both reach the needle plate at the same time when the top feed stroke is set at maximum. Fig. 11 - 10 Allow presser foot Loosen screws Turn feed lifting eccentric Tighten screws .

  • Page 53: Bobbin-case Opener

    Bobbin-case opener 04.11 (On Model 1246 make these adjustments on both bobbin openers.) The needle thread must not be clamped between the bobbin-case opener bin-case base 3 nor may it be clamped between projection needle plate (see arrows). Fig. 11 - 11 Thread the machine, insert test material and allow the presser foot to rest on the needle plate.

  • Page 54: Safety Clutch

    Safety clutch 04.12 Fig. 11 - 12 Remove the jammed thread. Press piston 11 - 14 The safety clutch is set by the manufacturer and screws 5 are sealed. If the thread jams, the safety clutch snaps out to prevent damage to the hook. A description of how to snap the clutch back in follows.

  • Page 55: Needle Thread Tension Release

    Needle thread tension release 04.13 With the presser foot raised, both of the tension discs must be at least The clearance of 0.5 mm is a minimum and can increase to more than when using thick threads. Fig. 11 - 13 Align pressure plate If the tension is correct, release pin behind tension carrier plate...

  • Page 56: Thread Check Spring

    Thread check spring 04.14 The movement of thread check spring material (approx. Due to technical reasons, the length of the thread-check spring path can vary a little in either direction. Fig. 11 - 14 Thread the machine, place test material under the presser foot and allow the presser foot to rest on the fabric using the presser foot lifter.

  • Page 57: Thread Check Spring On Pfaff 1246 With Thread Trimmer -900/56

    Thread check spring on PFAFF 1246 with thread trimmer -900/56 04.15 The motion of thread controller springs penetrates the material (= about Due to technical reasons, the length of the thread-check spring path can vary a little in either direction.

  • Page 58: Bobbin Winder

    Bobbin winder 04.16 1. With the bobbin winder switched on, the bobbin winder spindle must engage reliably. With the bobbin winder switched off, friction wheel must not touch drive wheel . 2. The bobbin winder must switch off automatically when the thread level is approximately Fig.

  • Page 59: Presser-foot Pressure

    Presser-foot pressure 04.17 The material must be fed reliably even at top sewing-speed. There mustn’t be pressure marks on the material. Fig. 11 - 16 Turn screw in accordance with the 11 - 19...

  • Page 60: Pre-adjusting The Control Cam

    Pre-adjusting the control cam 05.01 1. The eccentric bearing-surface of control cam 2. With the take-up lever at its TDC, the beginning of the largest eccentricity of the bearing surface (in the direction of rotation) must be underneath the point of pawl Fig.

  • Page 61: Tripping Lever

    Tripping lever 05.02 In needle rise position, the flattened pin of control lever the track of control cam Fig. 11 - 18 Screw out screw Loosen screws Bring the needle bar to needle rise position by turning the handwheel. Bring clamp to rest on the right side of the housing.

  • Page 62: Pawl

    Pawl 05.03 With the cut-off mechanism in resting position, there must be a distance of between the largest eccentricity of bearing surface Fig. 11 - 19 Position the largest eccentricity of bearing surface handwheel. Move bearing bolt 11 - 22 and pawl .

  • Page 63: Engaging Solenoid

    Engaging solenoid 05.04 In needle rise position and with engaging solenoid between engaging lever Fig. 11 - 20 Bring the machine to needle rise position by turning the handwheel. Loosen screw Manually activate engaging lever 2 so that pawl Press magneto inductor solenoid housing and the magneto inductor in accordance with the In this position tighten screw .

  • Page 64: Release Trip

    Release trip 05.05 In needle rise position and with control lever approx. Fig. 11 - 21 Bring the machine to needle rise position by turning the handwheel. Manually activate engaging lever 1 so that pawl Taking care to ensure that screw of the track of control cam .

  • Page 65: Engaging Lever

    Engaging lever 05.06 With the needle bar at TDC and with control lever distance of approx. Fig. 11 - 22 Bring the needle bar to TDC by turning the handwheel. Turn screw (nut ) in accordance with the Carry out a check by tapping control lever . at starting position, there must be a between bolt and the outer diameter of control cam .

  • Page 66: Linkage Rod

    Linkage rod 05.07 When shaft Fig. 11 - 23 Affix spherical head Loosen nuts Bring the machine to needle rise position by turning the handwheel and activate engaging lever . Taking care to ensure that lever accordance with the In this position tighten both nuts . Carry out a check in accordance with the 11 - 26 begins its sliding motion, lever...

  • Page 67: Final Adjustment Of The Control Cam

    Final adjustment of the control cam 05.08 When control lever coming from its BDC, the motion of the thread catcher Fig. 11 - 24 Bring the take-up lever to just past its TDC by turning the handwheel and loosen the accessible screws on control cam .

  • Page 68: Catch

    Catch 05.09 With the cut-off mechanism in resting position, there must be a distance of approx. between catch Fig. 11 - 25 Lightly affix catch Move catch accordance with the In this position, tighten screws . Using screws , screw plate 11 - 28 and control lever .

  • Page 69: Connecting Rod (for Pfaff 1246 Only)

    Connecting rod (for PFAFF 1246 only) 05.10 When the cutting device is in the off-position, the length of spacer rod the distance between shafts Fig. 11 - 25a Loosen nuts (right- and left-hand thread) when the cutting device is in the off-position.

  • Page 70: Thread-catcher Height

    Thread-catcher height 05.11 (On Model 1246 make these adjustments on both thread catchers.) When thread catcher 2 is pushed forwards manually with the take-up lever at its TDC, the lower point of the thread catcher must pass Fig. 11 - 26 Loosen screw Loosen the screws in retaining collar .

  • Page 71: Knife

    Knife 05.12 (On Model 1246 make these adjustments on both knives.) 1. The elongated hole of knife be touching the casting (see arrow). 2. When the point of needle catcher the knife, knife Fig. 11 - 27 Loosen screws . Move knife 3 in such a way that it cannot collide with thread catcher .

  • Page 72: Thread Catcher Reverse Position

    Thread catcher reverse position 05.13 (On Model 1246 make these adjustments on both thread catchers.) At the front point of reversal of thread catcher , its rear edge must be flush with the cutting edge of knife Fig. 11 - 28 Taking care to ensure that screw position and activate the engaging lever.

  • Page 73

    In this position and taking care to ensure that there is no horizontal play, tighten screw . 11 - 33...

  • Page 74: Bobbin-thread Clamp Spring

    Bobbin-thread clamp spring 05.14 (On Model 1246 make these adjustments on both clamp springs.) 1. Between clamp spring 2. At the front point of reversal of thread catcher , the points of clamp spring flush with the back edge of catcher Fig.

  • Page 75

    Bring the machine to needle rise position, activate the engaging lever and bring the thread catcher to its front point of reversal by turning the handwheel. Align clamp spring (screws ) in the elongated hole in accordance with if necessary carrier (screws ) as well.

  • Page 76: Tension Release Bar

    Tension release bar 05.15 1. With the cut-off mechanism in resting position and the presser foot raised, there must be a distance of approx. 2. When the point of thread catcher of the needle plate (see arrow) with the presser foot resting on the needle plate, the tension discs must be loosened to such an extent that the needle thread can be easily pulled through them.

  • Page 77

    Allow the presser foot to rest on the needle plate. By continuing to turn the handwheel, position the point of thread catcher at the same height as the edge of rear stop trip of the needle plate and press release bar to the left in accordance with using retaining collar .

  • Page 78: Positioner

    Positioner 05.16 When interrupting the sewing process, the machine must position itself at approx. After trimming the thread, the machine must position itself at the Carry out the adjustment as stipulated in the instruction manual of the motor. 11 - 38...

  • Page 79: Wearing Parts

    PFAFF 1245-6/07 PFAFF 1245 11-108 093-15 11-330 082-15 11-174 089-15 PFAFF 1245; 1246 91-140 538-91(Version B) 91-140 539-91(Version C) This list indicates the most important wearing parts. You can request a detailed parts list for the complete machine under parts number 296-12-18 085.

  • Page 80

    Wearing parts 91-140 726-01 91-176 328-05 12 - 2 99-137 151-45 PFAFF 1245; 1246 91-010 937-05 (1245 Version C) 91-010 179-05 (1246 Version B) 91-015 519-05 (1246 Version C) PFAFF 1245-900; 1246-900 91-171 049-05 91-171 042-05 91-140 180-91 11-108 006-15 (2x)

  • Page 81

    Notes...

  • Page 82

    PFAFF Industrie Maschinen GmbH Postfach 3020 D-67653 Kaiserslautern Königstr. 154 D-67655 Kaiserslautern Telefon: (0631) 200-0 Telefax: (0631) 17202 E-Mail: info@pfaff-industrial.com Gedruckt in der BRD Printed in Germany Imprimé en R.F.A. Impreso en la R.F.A.

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