245 1246 Instruction manual 2962-17 841 Betriebsanleitung engi. 10.
_______ This Instruction manual is valid for all models and subclasses listed in the chapter ,,Specifications”. The reprintng, copying or translation of PFAF Instruction Manuals, whether in whole or in part, is only permitted with our previous permission and with written reference to the source. G.M. PFAFF Aktiengesellschaft Postfach 3020 D 67653 Kaiserslautem - Königstr.
Index Contents Chapter Page - 1 Safety 1-1 1 .01 Directives 1 1 .02 General notes on safety 1 1 .03 Safety symbols 1 1 .04 Important points for the user 1 1 .05 Operating and specialist personnel 1 1 .05.01 Operating personnel 1 1 .05.02 Specialist personnel 1 1.06 Danger 2 Proper use 2 3 Specifications 3 3.01 3.02 3.03 3.04 3.05 3.06 PFAFF1245 Possible models and subclasses stitches/min Max. number of 1 PFAFF1246 Possible models and subclasses stitches/mm Max.
Index Contents . Chapter Page - 8 Mounting and commissioning the machine 8-1 8.01 Mounting 8-1 8.01.01 Adjusting the table-top height 8 8.01.02 Adjusting the V-belt tension 8 2 8.0103 Mounting the upper V-belt guard 8 2 8.01.04 Mounting the lower V-belt guard 8 3 8.01 05 Mounting tilt-over safeguard 8 3 8.01 .06 Mounting the spool holder 8 4 8.0107 Mounting the sewing lamp 8 -4 8.02 Commissioning the machine 8 5 8.03 Switching the machine on/off 8 5 9 Preparation 9 9.
Index Contents , Chapter Page 11 .03 Abbreviations 11 1 1.04 Adjusting the basic machine 11 11 .04.01 Positioning the feed dog across the direction of sewing 11 11 .04.02 Positioning the feed dog in the direction of sewing 11 11 .04,03 Height of the bottom feed-dog 11 11 .04,04 Pre-adjusting the needle height 11 1 ‘1 .04,05 Centering the needle in the needle hole 11 11 .04.06 Lifting motion of the bottom feed-dog 11 11 .04.07 Driving motion of the bottom and top feeds 11 11 .
Safety Safety 1.01 Directives This machine is constructed in accordance with the European regulations contained in the conformity and manufacturer’s declarations.
Safety 1.03 Safety symbols I • \ Danger! Points to be observed. Danger of injury for operating and specialist personnel! 1.04 Important points for the user to the • This Instruction Manual is a component part of the machine and must be available operating personnel at all times. first time. • The Instruction Manual must be read before operating the machine for the ent of • The operating and specialist personnel is to be instructed as to the safety equipm ds.
Safety t05 Operating and specialist personnel 1 .05.01 Operating personnel Operating personnel are persons responsible for the equpping, operating and cleaning of the machine as well as taking care of faults arising in the sewing area.
Safety Danger 1.06 A I,” A I,” A /f\ 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.
Safety Do not operate the machine without tilt-back safeguard 3! Danger of crushing between upper part and table top! 4 A I—” Do not operate the machine without belt guards 4 and 5! Danger of injury by the revolving V-belt! 1-03 1-5 PFAFF
Proper use 2 Proper use PFAFF 1245 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). PFAFF 1246 feed The Pfaff 1246 is a two-needle, flat bed sewing machine with bottom, top and needle for commercial as well as vertical sewing hook for lockstitch seams. The machine is intended (industrial) use only.
Specifications 3 Specifications• 3.01 PFAFF 1245 301 (!ockstitch) 134-35 Stitch type: Needle system Needle thickness in 1/100 mm: ModeIC’ Max. thread thickness (synthetic Model C: Max. stitch length: Model N Model N8 Handwheel eff. dia.: 110-140 A): 20/3 Max. speed 6.0 mm 8.0 mm 80 mm see chapter 3.03 Dimensions of machine: Length Width Height approx. 570 mm approx. 177mm approx.4lOmm 265 mm 115 mm 14 mm Clearance width Clearance height Fabric clearance (presser foot raised) approx.
Specifications 3.03 PFAFF s/min 1 Max. number of stitche Top feed lift Max. number of stitches/min’ for stitch lengths up to 6 mm Max. number of 1 for stitch stitches/mirr lengths from 6 mm to 8 mm less than 3.5 mm 2800 2600 from 3.5 to 5.5 mm 2500 2500 from 5.
Specifications 3o4 PFAFF 1246 301 (lockstitc 134-: Stitch type Needle system: Needle thickness in 1/1 00 mm: ModeIB ModelC Max. thread thickness (synthetic’): Model B Model C Max. stitch length: Model BN and CN 80-1< 110-1 4C 2C Model CN8 Handwheel eff. dia Max. speed 6.0 m 8.0 m 80 m see chapter 3.( Dimensions of machine: Length Width Height approx. 570 m approx. 177 m approx.410m 265 rn 115 rr 14 m Clearance width: Clearance height Fabric clearance (presser foot raised> approx.
c) n1 N) N) N) a a 01 - a o — a a N) N) a a a N) 01 N) 4 (0 a a a a a a a (71 a a N) b-i D — a a N) 0, S” 0 — () (71 3 a — a a (0 3 3 3 - 10 mm 1 for Max. number of stitches/mm’ stitch lengths up to 6 mm to 8 mm and needle gauge of more than 1 for Max. number of stitches/mm’ stitch lengths from 6 mm to 8 mm and needle gauge of up to 10 mm Max.
Disposal of the machine 4 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. If necessary a specialist is to be commissioned.
Transport packaging and storage 5 Transport packaging and storage 5.01 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. 5.02 Transport within the customer’s premises The manufacturer carries no liability for transport within the customer’s premises. Care is to be taken to transport the machine in an upright position only. 5.
Explanation of the symbols 6 Explanation of the symbols in the following section of this Instruction Manual, certain tasks or important pieces of information are accentuated by symbols.
Controls 7 Controls 7.01 On/off switch • Turn the machine on and off by switching the on/off switch 1 on and off. When the machine is on, the light in the switch is also on. ;- 0 N The switch in the illustration can be found on machines with Quick motors. When other motors are used, the switch may not look ®\ the same. N N Fi 7O1 7.
Controls 7.03 Pedal (on machines with automatic presser-foot lifter -910/98) With the on/off switch on 0 = Machine stop 0 +1 = Sew 1 = Raise presserfoot 2 = - - 1 -1 Trim thread (on machines with threac trimmer) -2 Fiq 7-03 7.04 Key on the machine head (for machines with backtacking mechanism -91 1/97) • Switch to reverse sewing by pressing key 1 while sewing.
Controls 7.05 Lever for lifting the presser foot • The sewing foot can be lifted by raising even. 1 Fig. 7 05 7.06 Feed regulator / reverse sewing • Adjust the stitch length by turning the knurled nut 1 accordingly. Reverse sewing • Press knurled nut 1 upwards as far as possible lposition WI.
Controls 7.07 Feed regulator (on machines with backtacking mechanism -91 1/97) 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 1 and the reverse stitch with knurled screw 2. 2. The options for setting the automatic start and end bartack are to be found in the instructior manual of the motor. .1 Fig. 7 O7 7.
Mounting and commissioning the machine 8 Mounting and commissioning the machine A 8.01 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.
Mounting and commissioning the machine 8.01.02 Adjusting the V-belt tension • Loosen nuts 1. • Tighten the V-belt with belt take-up hanger 2. • Tighten nuts 1. Fig. 8 02 Fig. 8 02 shows a Quick motor. If another motor is used, proceed as describE in the motor’s instruction manual. - 8.01.
Mounting and commissioning the machine Rol.04 Mounting the lower V-belt guard • Align belt-guard 7 in such a way that both the motor pulley and the V-belt run freely. / • Tighten screws 8. / Fig. 8-04 0 8.0105 described Fig. 8- 04 shows a Quick motor. If another motor is used, proceed as in the motor’s instruction manual. Mounting tilt-over safeguard • Screw-mount tilt-over safeguard 1 included in the accessories with screw 2.
Mounting and commissioning the machine 80106 Mounting the spool holder 0 (1 • Mount the spool holder as shown in Rg.8-05. • Insert spool holder in the table-top hole it by means of the included u Fg8-O5 8.0107 Mounting the sewing lampA and have it connected by • Screw the sewing lamp onto the table top (wood screws 5x35) a specialist. A 8-4 e.
Mounting and commissioning the machine 8.02 Commissioning the machine atic hoses for • Before commissioning the machine, check the electrical leads and pneum any damage. the • Remove pin 1 of the oil reservoir 2 (Fig. S 06). The pin serves only to protect .
Preparation 9 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! 9.01 Inserting the needle in the PFAFF 1245 /.
Preparation 9.02 Inserting the needle in the PFAFF 1246 Turn the machine off! Use only system 134-35 needles! • Loosen needle retaining screws 1. • 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). • Tighten needle retaining screws 1. Fg 9-Ola FAFF The selection of the correct needle depends on the model of the machine and the material and threads being sewn.
Preparation 9.03 on Winding the bobbin thread, adjusting the thread tensi • Place an empty bobbin 1 onto bobbin shaft 2. wind it clockwise around bobbin 1 • Thread the bobbin in accordance with Fig. 9 02 and a few times. pressing bobbin winder spindle 2 • Switch on the bobbin winder while at the same time and lever 3. - The bobbin fills up while you are sewing. d with knurled screw 4. • The tension of the thread on bobbin 1 can be adjuste 1 is full.
Preparation 9.04 Removing/Threading the bobbin case A / \ Turn the machine off! Removing the bobbin case. • Open the bed slide. • Raise latch 1 and remove bobbin case 2. Inserting the bobbin case. • Insert bobbin case 2 so that it clicks into place. • Close latch 1 and close the bed slide. 9.05 d tension Inserting the bobbin case / Adjusting the bobbin threa A Turn the machine off! / \ Threading the bobbin case. • Thread the bobbin as shown in Fig. 9 04.
Preparation 9.06 usting the needle thread tension in the Threading the needle thread I Adj PFAFF 1245 Turnthemachineoff! le is threaded from Fig. 9 05. Take note that the need • Thread the machine as shown in the left (see arrow). turning knuled screws 1..
_-- Preparation 9.07 Threading the needle thread / Adjusting the needle thread tension in the PFAFF 1246 + Fig. 9 06 - - — — Maschine ausschalten! • Thread the machine as shown in Fig. 9 06. 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 1.
Care and maintenance 10 Care and maintenance 10.
_ _ _ _ Care and maintenance 10.03 General lubrication — - ooo© -IL_ e Fig. OO2 A s at 40°C and a density of mm / Only use oil with a mean viscosity of 22.0 2 3 at 15°C. 0.865 g/cm no. 280-1 -1 20 144. We recommend PFAFF sewing machine oil.
Care and maintenance Turn the machine off! • • • • Lubricate all bearings marked in Fig. 10.02 twice a week. Open the bed slide to gain access to oiling point 1. Pull the knee lever out to the front and lay the machine on its back. Lubricate all bearings marked in Fig. 10.03 twice a week. Setting the machine upright and return the machine to an • Hold the machine, press tilt safety device 3 (Fig. 10-04) upright position with both hands. Danger of crushing between machine and table top! 10.
_____________________________________ Care and maintenance 10.05 Lubricating the head Turn the machine off! • Unscrew the face plate. • Lubricate all bearings and moving parts marked in Fig. 10- 05 twice a week. • Screw the face plate back on. Only use oil with a mean /s at 40°C 2 viscosity of 22.0 mm 3 and a density of 0.865 g/cm at 15°C. We recommend PFAFF sewing machine oil. Part no. 280-1-1 20 144. Ftg, 10-05 10.
Care and maintenance 10.07 Checking the air pressure • Before each use of the machine, check the air pressure on gauge 1 • The gauge must display a pressure of 6 bar. • If necessary, alter the pressure to this level. • To do so, lift button 2 and turn it so that the gauge shows a pressure of 6 bar. • Press button 2 back down again. 1 Fig. 10-07 10.
Adjustment Adjustment 11 1245 single-needle machine. The illustrations in this section show the PFAFF us adjustments must be made For the PFAFF 1246 two-needle machine, vario hooks. This will be pointed out in twice, i.e. to the left- and right-hand sewing ible to apply the mirror image the respective sections, whereby it is often poss of the illustrations. 11.01 for adjusting Tools, gauges and other accessories • • • • • • • • • 11.
Adjustment 11.04 Adjusting the basic machine 11 .ot.oi the direction of sewing Positioning the feed dog across Requirement right side of the needlethe same distance from the left and The bottom feed dog must be plate cutout. .4 1 4 1 Fg. 11 -O • Loosen screws 1 and 2. t. rdance with the requiremen • Laterally align rock shaft 3 in acco • Now tighten screws 1. ws 1 and rock opposite the flat sides of scre The flat sides of pins 4 must be nor stiffness.
Adjustment 1104.02 ng Positioning the feed dog in the direction of sewi Requirement t have the same k With the longest stitch set, the bottom feed dog mus feeding both ti when ate cutout le-pl need the ct to respe with and the back backwards. .iiJ - 1 Fig 11-02 • Set the longest stitch. irement and tighten screws 2.
Adjustment 11 .04.03 Height of the bottom feed-dog Requirement trude over the needle plate ,,0, the bottom feed dog must pro With the stitch length set at TDC. as high as the teeth when at Fig. 11 -03 • Set stitch length 0” dwheel, to its TDC by turning the han • Bring the bottom feed dog the requirement. ews 2) in accordance with • Adjust feed dog carrier 1 (scr machines without a ht can be reduced a little on If required, the feed dog heig ut P).
Adjustment 11 .04.04 P re-adjusting the need)e height Requirement n the needle bar and the needle plate With the needle bar at BDC, the distance betwee must be 15mm. Fig. 11 -04 with the requirement without moving it • Move needle bar 1 (screw 2) in accordance laterally.
Adjustment 11.04.05 Centering the needle in the needle hole Requirement With the stitch length set at ,,0’, the needle must enter the needle hole exactly in the middle. 7i 7 tL 6 r iKz I . () 05 • Unscrew vibrating presser 1 and presser foot 2. • Set stitch length ,,0” and bring the needle bar to its TDC. • Insert a new needle. Loosen screws 3, 4, 5 and 6. • Position the needle directly over the bottom feed dog by turning the handwheel. • Move needle bar frame 7 in accordance with the requirement.
Adjustment 11.04.06 Lifting motion of the bottom feed-dog t bottom feed lifting phase (without P). This adjustment does not apply for machines withou a Requirement must be at its TDC, 1. With the needle bar at its 8DC, the bottom feed dog reach the top surface of the must dog feed bottom 2. With the longest stitch set, the the handwheel is turned. when point needle the as time same the needle plate at Fig. 1106 • Bring the needle bar to its BDC. with requirement 1.
Adjustment 11.04.07 Driving motion of the bottom and top feeds Requirement feeds With the longest stitch length set and the needle bar at its BDC, the top and bottom activated. is lever should not move when the reverse-feed 2 Fg. 1 1 1 07 Set the longest stitch. 2 can be turned on Loosen screws 1 just far enough so that the feed driving eccentric the shaft with difficulty. • Bring the needle bar to its BDC, downwards.
Adjustment 11 .04.08 Hook-to-needle clearance, needle rise, needle height and needle guard hooks.) (On Model 1246 make these adjustments on both sewing Requirement the needle With the stitch length set at ,,3’ and the needle rise at (1.8mm after BDC of following the model C), on bar needle bar on model ,,B’ and 2.0mm after BDC of the must be true: must be pointing 1. The distance to the needle must be 0.05 0.1 mm and the hook point to the middle of the needle. hook point. 2.
_______ kdjustment 1 4 1 5 Fig. 11 -08 needle bar bearing. adjustable clamp is touching the that the needle needle, taking care to ensure the of dle mid the at nt poi k • Position the hoo 7. is not pressed by needle guard hook does not exhibit too not too close, and that the is 5 ion pin el bev that g urin • While ens rest on much play, tighten screws 2. bring retaining collar 6 to ic thread trimmer -900/56, mat auto h wit es hin mac On • ws 3. bevel pinion 5 and tighten scre pter 11.04.04).
Adjustment 11 .04.9 Top-feed stroke Requirement ng At the largest top-feed stroke setting and stitch length 0” presser foot 1 and vibrati . is turned heel the handw when plate needle presser foot 2 must lift 7.0 mm from the 4 3. 1 Fig. 11 .9 • Set the largest top-feed stroke and the stitch length at ,0”. • Bring presser foot 1 to rest on the needle plate. foot 2 has reached • Turn the handwheel in the direction of rotation until vibrating presser its highest point.
Adjustment 11.04.10 Lifting motion of the top feed Requirement le plate, the vibrating presser foot 4 and the When presser foot 1 is resting on the need le plate at the same time when the top feed need point of the needle must both reach the stroke is set at maximum. Fig. 11 -10 • • • • • . Allow presser foot 1 to rest on the needle plate can be turned on its shaft with difficulty. Loosen screws 2 until feed lifting eccentric 3 the requirement.
Adjustment 11.04.11 Bobbin-case opener (On Model 1246 make these adjustments on both bobbin openers.) Requirement The needle thread must not be clamped between the bobbin-case opener 1 and the bob bin-case base 3 nor may it be clamped between projection 4 and the retaining trip of the needle plate (see arrows). Fig. 1 1 . 11 • Thread the machine, insert test material and allow the presser foot to rest on the needle plate.
4djustment 11.O4I2 Safety clutch [nJ s 5 are sealed. the manufacturer and screw The safety clutch is set by age to the hook. clutch snaps out to prevent dam ety saf the s, jam ead thr If the p the clutch back in follows. A description of how to sna 5 Fig. 11 -12 thread.
Adjustment 11.04.13 Needle thread tension release Requirement 0.5 mm apart. 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 1 mm when using thick threads. 2 0.5 mm Fig. 11 -13 in accordance wth the requirement. • Align pressure plate 1 behind tension carrier plate 2 II pressure.
Adjustment 11.04.14 Thread check spring Requirement le point enters the spring 2 must be finished when the need The movement of thread check ). material (approx. 7 mm spring path di a th of the thread-check spring path can vary Due to technical reasons, the leng little in either direction. Fig. 11 .14 allow the presser material under the presser foot and • Thread the machine, place test er foot lifter. foot to rest on the fabric using the press • Loosen screw 1 up lever to its TDC.
Adjustment 11.04.15 trimmer 9OO/56 Thread check spring on PFAFF 1246 with thread Requirement should cease as soon as the needle point The motion of thread controller springs 1 and 6 ion). deflect spring 7 mm penetrates the material (= about -i • • • • spring path can var’ a Due to technical reasons, the length of the thread-check little in either direction. tance of thread check spring 1. Turn screw 2 (screw 3) to adjust the spring resis ment.
Adjustment 11.04.16 Bobbin winder Requirement bobbin winder spindle must engage reliably. 1. With the bobbin winder switched on, the wheel 5 must not touch drive wheel 1. friction off, ched With the bobbin winder swit matically when the thread level is approximately 2. The bobbin winder must switch off auto 1 mm from the edge of the bobbin. 2 15 Fig. 11 .15 ce with requirement 1. • Move drive wheel 1 (screws 2) in accordan winder.
Adjustment 11.o4.17 Presser-foot pressure Requirement re The material must be fed reliably even at top sewing-speed. There mustn’t be pressu marks on the material. 1 Fig. 11 -16 • Turn screw 1 in accordance with the requirement.
djustmen t 11.05 r -900/56 Adjusting the thread trimme 11 0501 Pre-adjusting the control cam Requient rally in the middle of pawl 8. face of control cam 5 must be late 1. The eccentric bearing-sur eccentricity of the est larg the at its TDC, the beginning of 2. With the take-up lever the point of paw> 8. eath ern und be st mu n of rotation> bearing surface (in the directio 11 .17 Remove catch 1 (screws 2). Remove plate 3 (screws 4>. retaining collar 7.
Adjustment 11.0502 Tripping lever Requirement In needle rise position, the flattened pin of control lever 6 (see arrow) must fall slightly into the track of control cam 7 when activating lever 8 is activated. ° 7\N , 11-18 9 Fi Screw out screw 1 and swing out connecting rod 2. Loosen screws 3 and 4. Bring the needle bar to needle rise position by turning the handwheel. Bring clamp 5 to rest on the right side of the housing.
4djustment 11.0503 PawI Requirement position, there must be a distance of 0.3 mm With the cut-off mechanism in resting ing surface 1 and pawl 2. bear of between the largest eccentricity Fg. fl -19 ng the ing surface 1 underneath pawl 2 by turni • Position the largest eccentricity of bear handwheel. ce with the requirement.
Adjustment 11 .05.04 Engaging solenoid Requirement In needle rise position and with engaging solenoid 5 activated, there must be a distance of 0.3 mm between engaging lever 2 and pawl 3. 0 3 1 Fig. 11 . 20 • • • • Bring the machine to needle rise position by turning the handwheel. Loosen screw 1 until the engaging solenoid can be turned with difficulty. Manually activate engaging lever 2 so that pawl 3 engages.
Adjustment 11.05.05 Release trip Requirement of rol lever 4 engaged, there must be a distance In needle rise position and with cont . track cam the of of the control lever and the base approx. 0.3 mm between the bolt 6 \-\ ((C(61AO iA’\ \ I 3 1 Fig. 11 -21 tion by turning the handwheel. • Bring the machine to needle rise posi that pawl 2 engages.
Adjustment 11 05.06 Engaging lever Requirement With the needle bar at TDC and with control lever 3 at starting position, there must be a distance of approx. 0.3 mm between bolt 4 and the outer diameter of control cam 5. Fig. 1 1 - 22 • Bring the needle bar to TDC by turning the handwheel. • Turn screw 1 (nut 2) in accordance with the requirement. • Carry out a check by tapping control lever 3.
Adjustment 11.05.07 Linkage rod Requirement lever 6 must simultaneously lift from stop 7. When shaft 9 begins its sliding motion, Fig. 11 23 using screw 2. • Affix spherical head 1 to control lever 3 d). threa ed • Loosen nuts 4 (right and left hand turning the handwheel and activate • Bring the machine to needle rise position by engaging lever 5. rod 8 in hing stop 7 (see arrow), turn linkage • Taking care to ensure that lever 6 is touc accordance with the requirement.
Adjustment 11 .05.08 Final adjustment of the control cam Requirement When control lever 3 is engaged and the needle point is 12 mm above the needle plate coming from its BDC, the motion of the thread catcher 5 must begin. 3 cW 4—’N Jc /Th\ I / Fg 1124 • Bring the take-up lever to just past its TDC by turning the handwheel and loosen the accessible screws on control cam 1.
Adjustment 11 .05.09 Catch Requirement of approx. 5 mm resting position, there must be a distance With the cut-off mechanism in lever 6. between catch 1 and control Fig. 1 1 25 2 using screws 3. • Lightly affix catch 1 and cover plate move it laterally in the direction of the arrow and then • Move catch 1 as far as possible in accordance with the requirement. • In this position, tighten screws 3. • Using screws 5, screw plate 4 on.
Adjustment 11.05,10 Connecting rod (for PFAFF 1246 only) rquirement When the cutting device is in the off-position, the length of spacer rod 4 should be equal to the distance between shafts 2 and 3. X 1 4 ii X Fig. 11 • • • • ‘FAFF - 25a Loosen nuts 1 (right- and left-hand threadl when the cutting device is in the off-position. Measure the distance between shafts 2 and 3. Rotate connecting rod 4 according to the requirement. Re-tighten nuts 1.
Adjustment 11.05.11 Thread-catcher height ers.> d (On Mode’ 1246 make these adjustments on both threa catch Requirement lly with the take-up ever at its TDC, the When thread catcher 2 is pushed forwards manua mm over the back of hook 4. lower point of the thread catcher must pass 1 I M) °2 0 2 O,lmm[ ® 40 Fig. 11-26 can be turned. Loosen screw 1 enough so that thread catcher 2 Loosen the screws in retaining collar 3. handwheel. Bring the take-up lever to its TDC by turning the requirement.
Adjustment 11.0512 Knife (On Modes 1246 make these adjustments on both knives.) Requirement 1. The elongated hole of knife 3 must be parallel to knife carrier 5 and the knife must not be touching the casting (see arrow). 2. When the point of needle catcher 4 protrudes approx. 3 mm over the cutting edge of the knife, knife 3 must just touch thread catcher 4. 3 2 5 Fig. 11 27 • Loosen screws 2.
Adjustment 11.05.13 e position Thread catcher revers th thread catchers.) these adjustments on bo ke ma 46 12 el od M (On e must be flush with the r Requirement thread catcher 3, its rea edg of a) ers rev of nt poi nt At the fro e arrow). cutting edge of knife 4 (se J© Fig. 11 -28 chine to needle rise loosened, bring the ma is 1 ew scr t tha ure ens • Taking care to engaging lever. reversal.
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Adjustment 11.05.14 Bobbin-thread clamp spring on both clamp springs.) (On Model 1246 make these adjustments Requirement t be a distance the bottom of thread catcher 4, there mus 1. Between clamp spring S and of 0.3 mm. p spring 5 must be of thread catcher 4, the points of clam 2. At the front point of reversal of approx. er 4 (see arrow). There must be a distance flush with the back edge of catch 7.
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Adjustment 11.0515 Tension release bar Requirement foot raised, there must in resting position and the presser ism han mec ff cut-o the 1. With bar 8 and housing 9. between the left edge of release be a distance of approx. 7 mm edge of stop trip 6 rear the catcher 5 is at the same height as dle plate, the nee 2.
Adjustment • Allow the presser foot to rest on the needle plate. thread catcher 5 at the same • By continuing to turn the handwheel, position the point of bar 8 to the height as the edge of rear stop trip 6 of the needle plate and press release left in accordance with requirement 2 using retaining collar 7. • In this position tighten screws 1. The eccentricity of retaining collar 7 must be pointing downwards. • Carry out a check in accordance with the requirement. F1g.
Adjustment 11.05.16 Positioner Requirement ox. ess, the machine must position itself at appr When interrupting the sewing proc bar. 4 mm after the BDC of the needle must position itself at the TDC of the ine mach the d, threa the ming After trim take-up lever. r.
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31