Pfaff 1246 User Manual Page 1

Instruction manual296-12-18 401/002Betriebsanleitung engl. 01.0212451246This instruction manual applies to machines from thefollowing serial numbers

SafetyDo not operate the machinewithout belt guards 4 and 5!Danger of injury by the revolvingV-belt!1 - 5Fig.1 - 02Fig. 1 - 03453Do not operate the ma

2 - 1Proper use2 Proper usePFAFF 1245The PFAFF 1245 is a single needle, flatbed sewing machine with bottom, top and needlefeeds as well as a large ver

3 - 1Specifications3.02 Possible models and subclassesModel C: ... For processing medi

3 - 2Specifications3.03 Max. number of stitches/min-1Max. number ofstitches/min-1 forstitch lengths up to 6 mmTop feed lift Max. number ofstitches/min

3 - 3Specifications3.04 PFAFF 1246◆Stitch type:...

3 - 4Specifications3.06 Max. number of stitches/min-1less than 3.5 mmfrom 3.5 to 5.5 mmfrom 5.5 to 7 mm2700 25002400 22001900 1700Max. number of stitc

Disposal of the machine4 - 14 Disposal of machine waste● The proper disposal of machine waste is the responsibility of the customer.● The materials us

Transport packaging and storage5 - 15 Transport packaging and storage5.01 Transport to the customer’s premisesWithin the Federal Republic of Germany,

Explanation of the symbols6 - 16 Explanation of the symbolsIn the following section of this Instruction Manual, certain tasks or important pieces ofin

7 - 1Controls● Turn the machine on and off by switchingthe on/off switch 1 on and off. When themachine is on, the light in the switch isalso on.The sw

This Instruction manual is valid for all models and subclasses listed in thechapter „Specifications“.The reprinting, copying or translation of PFAFF I

7 - 2Controls7.04 Key on the machine head (for machines with backtacking mechanism -911/97)Fig. 7 - 030- 1- 2+ 1With the on/off switch on0 = Machine s

7 - 3ControlsFig. 7 - 061● Adjust the stitch length by turning theknurled nut 1 accordingly.Reverse sewing● Press knurled nut 1 upwards as far aspossi

7 - 4Controls7.07 Feed regulator (on machines with backtacking mechanism -911/97)You can set the length of the reverse stitchas large as is required,

8 - 1Mounting and commissioning the machine8.01 MountingThe necessary electricity and compressed air supplies must be available at the machine’slocati

8 - 2Mounting and commissioning the machine8.01.02 Adjusting the V-belt tension● Loosen nuts 1.● Tighten the V-belt with belt take-uphanger 2.● Tighte

8 - 3Mounting and commissioning the machineFig. 8 - 04 shows a Quick motor. If another motor is used, proceed as describedin the motor’s instruction m

8 - 4Mounting and commissioning the machineFig. 8 - 058.01.06 Mounting the spool holder● Mount the spool holder as shown inFig. 8 - 05.● Insert spool

8 - 5Mounting and commissioning the machine8.02 Table top cutout8.02.01 PFAFF 1245Standposition

8 - 6Mounting and commissioning the machine8.02.02 PFAFF 1246Gestell

8 - 7Mounting and commissioning the machine8.03 Commissioning the machine● Before commissioning the machine, check the electrical leads and pneumatic

IndexContents ... Chapter - Page1 Safety ...

Preparation9 - 19 PreparationAll regulations and instructions in this Instruction manual are to be observed!Special attention is to be paid to all Not

Preparation9 - 2Turn the machine off!Use only system 134 - 35 needles!● Loosen needle retaining screws 1.● Insert needles as far as it will go (thelon

Preparation9 - 3● Place an empty bobbin 1 onto bobbin shaft 2.● Thread the bobbin in accordance with Fig. 9 - 02 and wind it clockwise around bobbin 1

Preparation9 - 49.05 Inserting the bobbin case / Adjusting the bobbin thread tensionTurn the machine off!Threading the bobbin case.● Thread the bobbin

Preparation9 - 5Fig. 9 - 0519.06 Threading the needle thread / Adjusting the needle thread tension in thePFAFF 1245Turn the machine off!● Thread the

Preparation9 - 69.07 Threading the needle thread / Adjusting the needle thread tension in thePFAFF 1246Maschine ausschalten!● Thread the machine as

Care and maintenance10 - 1Turn the machine off!● Clean the hook compartment daily with abrush, more often if in continuousoperation.● Thoroughly clea

Care and maintenance10 - 2Fig. 10 - 03Only use oil with a mean viscosity of 22.0 mm2/s at 40°C and a density of0.865 g/cm3 at 15°C.We recommend PFAFF

Care and maintenance10 - 3Turn the machine off!● Lubricate all bearings marked in Fig. 10.02 twice a week.● Open the bed slide to gain access to oili

Care and maintenance10 - 410.05 Lubricating the headTurn the machine off!● Unscrew the face plate.● Lubricate all bearings and moving partsmarked in

IndexContents ... Chapter - Page8 Mounting and commissioning the machine .

Care and maintenance10 - 5Turn the machine off!Remove the compressed-air hosefrom the air filter.Emptying the water trap● Water trap 1 empties itself

Adjustment11 - 111 AdjustmentThe illustrations in this section show the PFAFF 1245 single-needle machine.For the PFAFF 1246 two-needle machine, variou

Adjustment11 - 211.04 Adjusting the basic machine11.04.01 Positioning the feed dog across the direction of sewingRequirementThe bottom feed dog must b

Adjustment11 - 311.04.02 Positioning the feed dog in the direction of sewingRequirementWith the longest stitch set, the bottom feed dog must have the

Adjustment11 - 411.04.03 Height of the bottom feed-dogRequirementWith the stitch length set at „0“, the bottom feed dog must protrude over the needle

Adjustment11 - 511.04.04 Pre-adjusting the needle heightRequirementWith the needle bar at BDC, the distance between the needle bar and the needle plat

Adjustment11 - 611.04.05 Centering the needle in the needle holeRequirementWith the stitch length set at „0“, the needle must enter the needle hole ex

Adjustment11 - 711.04.06 Lifting motion of the bottom feed-dogThis adjustment does not apply for machines without a bottom feed lifting phase (without

Adjustment11 - 811.04.07 Driving motion of the bottom and top feedsRequirementWith the longest stitch length set and the needle bar at its BDC, the to

Adjustment11 - 911.04.08 Hook-to-needle clearance, needle rise, needle height and needle guard(On Model 1246 make these adjustments on both sewing hoo

IndexContents ... Chapter - Page11.03 Abbreviations ...

Adjustment11 - 10214516Fig. 11 - 08573adjustable clamp is touching the needle bar bearing.● Position the hook point at the middle of the needle, takin

Adjustment11 - 1111.04.9 Top-feed strokeRequirementAt the largest top-feed stroke setting and stitch length „0“, presser foot 1 and vibratingpresser f

Adjustment11 - 1211.04.10 Lifting motion of the top feedRequirementWhen presser foot 1 is resting on the needle plate, the vibrating presser foot 4 an

Adjustment11 - 1311.04.11 Bobbin-case opener(On Model 1246 make these adjustments on both bobbin openers.)RequirementThe needle thread must not be cla

Adjustment11 - 1411.04.12 Safety clutch● Remove the jammed thread.● Press piston 1 and turn the handwheel until hook 3 of pawl 2 clicks into groove 4.

Adjustment11 - 1511.04.13 Needle thread tension releaseRequirementWith the presser foot raised, both of the tension discs must be at least 0.5 mm apar

Adjustment11 - 1611.04.14 Thread check springRequirementThe movement of thread check spring 2 must be finished when the needle point enters themateria

Adjustment11 - 1711.04.15 Thread check spring on PFAFF 1246 with thread trimmer -900/56RequirementThe motion of thread controller springs 1 and 6 shou

Adjustment11 - 1811.04.16 Bobbin winderRequirement1. With the bobbin winder switched on, the bobbin winder spindle must engage reliably.With the bobbi

Adjustment11 - 1911.04.17 Presser-foot pressureRequirementThe material must be fed reliably even at top sewing-speed. There mustn’t be pressuremarks o

Safety1 Safety1.01 DirectivesThis machine is constructed in accordance with the European regulations contained in theconformity and manufacturer’s dec

Adjustment11 - 2011.05 Adjusting the thread trimmer -900/5611.05.01 Pre-adjusting the control camRequirement1. The eccentric bearing-surface of contro

Adjustment11 - 2111.05.02 Tripping leverRequirementIn needle rise position, the flattened pin of control lever 6 (see arrow) must fall slightly intoth

Adjustment11 - 2211.05.03 PawlRequirementWith the cut-off mechanism in resting position, there must be a distance of 0.3 mmbetween the largest eccentr

Adjustment11 - 2311.05.04 Engaging solenoidRequirementIn needle rise position and with engaging solenoid 5 activated, there must be a distanceof 0.3 m

Adjustment11 - 2411.05.05 Release tripRequirementIn needle rise position and with control lever 4 engaged, there must be a distance ofapprox. 0.3 mm b

Adjustment11 - 2511.05.06 Engaging leverRequirementWith the needle bar at TDC and with control lever 3 at starting position, there must be adistance o

Adjustment11 - 2611.05.07 Linkage rodRequirementWhen shaft 9 begins its sliding motion, lever 6 must simultaneously lift from stop 7.Fig. 11 - 23● Aff

Adjustment11 - 2711.05.08 Final adjustment of the control camRequirementWhen control lever 3 is engaged and the needle point is 12 mm above the needle

Adjustment11 - 2811.05.09 CatchRequirementWith the cut-off mechanism in resting position, there must be a distance of approx. 5 mmbetween catch 1 and

Adjustment11 - 2911.05.10 Connecting rod (for PFAFF 1246 only)● Loosen nuts 1 (right- and left-hand thread) when the cutting device is in the off-posi

Safety1.03 Safety symbolsDanger!Points to be observed.Danger of injury for operating and specialist personnel!1 - 21.04 Important points for the user●

Adjustment11 - 3011.05.11 Thread-catcher height(On Model 1246 make these adjustments on both thread catchers.)RequirementWhen thread catcher 2 is push

Adjustment11 - 3111.05.12 Knife(On Model 1246 make these adjustments on both knives.)Requirement1. The elongated hole of knife 3 must be parallel to k

Adjustment11 - 3211.05.13 Thread catcher reverse position(On Model 1246 make these adjustments on both thread catchers.)RequirementAt the front point

Adjustment11 - 33● In this position and taking care to ensure that there is no horizontal play, tighten screw 1.

Adjustment11 - 3411.05.14 Bobbin-thread clamp spring(On Model 1246 make these adjustments on both clamp springs.)Requirement1. Between clamp spring 5

Adjustment11 - 353Fig. 11 - 29 A512 mm7● Bring the machine to needle rise position, activate the engaging lever and bring thethread catcher to its fro

Adjustment11 - 3611.05.15 Tension release barRequirement1. With the cut-off mechanism in resting position and the presser foot raised, there mustbe a

Adjustment11 - 37● Allow the presser foot to rest on the needle plate.● By continuing to turn the handwheel, position the point of thread catcher 5 at

Adjustment11 - 3811.05.16 PositionerRequirementWhen interrupting the sewing process, the machine must position itself at approx.4 mm after the BDC of

Wearing parts12 - 191-140 538-91(Version B)91-140 539-91(Version C)PFAFF 1245; 124612 Wearing partsThis list indicates the most important wearing part

Safety1.05 Operating and specialist personnel1.05.01 Operating personnelOperating personnel are persons responsible for the equipping, operating and c

Wearing parts12 - 211-108 006-15 (2x)11-130 089-15 (2x)11-130 089-15 (2x)91-018 147-0591-018 885-1591-113 480-9191-140 180-9199-137 151-4591-171 049-0

Notes

PFAFF Industrie Maschinen GmbHPostfach 3020D-67653 KaiserslauternKönigstr. 154D-67655 KaiserslauternTelefon: (0631) 200-0Telefax: (0631) 17202E-

Safety1 - 41.06 DangerA working area of 1 metre is to be kept free both in front of and behind themachine while it is in operation so that it is alway