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38. Adjustment of thread check spring stroke

The thread check spring prevents the descending needle from piercing the slack needle thread. The

needle thread is slackened by the descending take-up lever.

Requirement:

Thread check spring 126 must keep the needle thread taut at least until the needle point enters the fabric

(fig. 77).

The thread check spring must release the needle thread as soon as the lower edge of the needle eye ent-

ers the fabric.

Check:

Press the straight stitch button.

Set stitch length to "6.0".

Place two layers of fabric under the presser foot.

Sew a few stitches.

Turn the handwheel and determine the end of the thread check spring stroke.

Correct slackening of the needle thread takes place when it enters the needle eye not tautly but in a

loose curve.

Adjustment:

Loosen screw 128.

Turn thread check spring stop sleeve 127 until thread check spring 126 is in the correct position.

Tighten screw 128.

Cross-check:

Sew a few stitches and proceed as described under "Check".

Содержание select 1520

Страница 1: ...Service Manual 1st Release August 2001 ...

Страница 2: ......

Страница 3: ...ch unit on Pfaff 1520 1530 35 16 Basic position of setting eccentric for the sideways needle position 36 17 Adjustment of needle penetration in needle plate slot 37 18 Adjustment of the sideways movement of the needle bar 38 19 Adjustment of the stop for the left needle position 40 20 Adjustment of the feed reversing bar 42 21 Replacing the utility stitch unit on Pfaff 1540 44 22 Adjustment of the...

Страница 4: ...6 44 Removing and fitting the sewing hook 78 45 Cleaning and oiling the machine 78 46 Changing the toothed belt 80 47 Adjusting the arm shaft crank 82 48 Changing the bevel gears 84 49 Changing the motor 88 50 Changing the motor circuit board on motor types UUS 390 and UUS 393 90 51 Changing the carbon brushes on motor types UUS 390 and UUS 393 91 52 Changing the motor pinion 92 53 Changing the mo...

Страница 5: ...ents Unless otherwise specified the handwheel must always be turned forward When carrying out maintenance work on live parts or in their proximity the machine is to be separated from the power supply by disconnecting the lead cord from the electrical socket An electrical safety test must be carried out after all repair work even if the repair work is of a mechanical nature The required electrical ...

Страница 6: ...8 40 z Torx screwdriver TX 10 07 434008 44 z Torx screwdriver TX 15 07 434008 45 z Torx screwdriver TX 20 07 434008 46 z Torx screwdriver TX 25 07 434008 47 z Torx offset screwdriver TX 15 07 434008 74 z Circlip fitting tool 2 3 short 07 437003 20 z Circlip fitting tool 3 2 short 07 437003 30 z Circlip fitting tool 4 0 short 07 437003 40 z Circlip fitting tool 5 0 short 07 437003 50 z Circlip fitt...

Страница 7: ...remove particularly persistent dirt use a soft cloth with a neutral cleansing agent for plastic materials Please note Do not use any insecticides or chemical products such as petrol gas or liquid chemicals to clean the housing Safety 1 The machine must be put into operation according to the indications on the specification plate 2 Do not place any objects in the openings on the machine 3 Do not us...

Страница 8: ...rams program dial A straight stitch program with 15 needle positions A zigzag program with 15 needle positions A buttonhole program with adjustable width 12 utility stitches High ohm foot control cold with torque raising Detailed specifications of the machines z Electronic free arm utility stitch machine z Directly controlled automatic utility stitch unit step down ratio 6 1 1540 z Program selecti...

Страница 9: ...weight metal z Weight of sewing head approx 8 kg z Needle system 130 705 H Additional needle system classifications Twin needle Suffix Zwi Wing needle Suffix Wing Twin hem stitching needle Suffix Zwi Ho Top stitch needle Suffix N Stretch needle Suffix PS Jeans needle Suffix J Possible needle points Small ball point Suffix SES Medium ball point Suffix SUK Large ball point Suffix SKF Very pointed ro...

Страница 10: ...emove the two Torx screws of the housing insert z Remove housing insert z Lay the machine on its back and remove the four fastening screws of the baseplate z Remove baseplate z Remove the two fastening screws 1 of free arm cover fig 1 z Pull the left hand side of the free arm cover a little bit downwards and remove it towards the left z Remove needle plate z Remove the two fastening screws 2 of th...

Страница 11: ...s 4 5 6 and 7 of the rear housing shell fig 3 and 4 z Loosen the snap connections by pressing with your thumb on the spots marked with arrows on the inner surface of the arm fig 5 z Remove the rear housing shell z Remove motor cover ...

Страница 12: ...10 z Loosen the fastening screws 8 9 and 10 of the front housing shell fig 5 and 6 z Remove fastening screws 10 and 11 ...

Страница 13: ...11 z Remove fastening screw 12 fig 7 z Switch on the top key row of the utility stitch unit z Carefully remove the front housing shell by lifting it off The assembly must be carried out in reverse order ...

Страница 14: ...12 Notes ...

Страница 15: ... of rotation However it must be possible to turn the machine easily Adjustment z Loosen screw 1 fig 1 z Re position tensioning roller 2 with a screwdriver as required z Tighten screw 1 Check z Check adjustment according to the Requirement z Press lightly against the middle of the toothed belt 250 g The toothed belt should move forward by some 1 to 3 mm ...

Страница 16: ... screws 3 and 4 fig 2a z Loosen screw 5 z Detach spring 6 z Re position feed dog driving shaft 7 with the two cylindrical pins 8 and 9 sideways until the feed dog is centered in the feed slot z Firmly tighten the two screws 3 and 4 z Push bolt 11 against connecting bar 10 z Firmly tighten screw 5 z Re attach spring 6 Cross check The feed dog must be exactly in the center of the feed slot The feed ...

Страница 17: ...15 ...

Страница 18: ...must slide lightly back z Loosen screw 15 fig 5 z Move the top feed lever forwards and backwards z The top feed should move freely without any difficulty if necessary remove cause of binding z Fit bolt 13 with the washer located to the left of pull rod 18 and ensure that it is free from play fig 4 z Move the complete top feed lever forwards and backwards z Make sure that both top and bottom feed m...

Страница 19: ...17 ...

Страница 20: ...ing position z Carry out a visual check z The feed dog must not touch the gauge but must clear it by 0 1 mm Adjustment z Loosen screw 19 by just 1 8 of a turn fig 7 z Turn eccentric stud 20 until the eccentric is facing the rear part of the housing basic position z Turn the eccentric stud to the left until the feed dog height is properly set z Tighten screw 19 Cross check z Turn the handwheel and ...

Страница 21: ...position again The zigzag foot must rest parallel and without play on the presser foot gauge However the presser foot gauge must not lift the zigzag foot and the needle thread tension release 23 must be without play Adjustment z Loosen screw 21 fig 9 z With the presser bar lifter raised turn the zigzag foot until it is parallel to the sides of the presser foot gauge z Use a screwdriver to press pr...

Страница 22: ...out play on the presser foot gauge However the presser foot gauge must not lift the zigzag foot and the needle thread tension release 23 must be without play fig 10 Adjustment z Loosen the three screws 21 24 and 25 z With the presser bar lifter raised turn the zigzag foot until it is parallel to the sides of the presser foot gauge z Use a screwdriver to press presser bar guide 22 firmly downward z...

Страница 23: ...21 ...

Страница 24: ...el until the rising feed dog is flush with the needle plate surface z Lower the presser bar lifter z Carry out a visual check Adjustment z Loosen screw 26 fig 12 z Raise the presser bar lifter until the top feed foot is just resting on top of the feed dog z At the same time push the top feed dog to the front or to the rear until its front edge is between the first and second tooth point of the cen...

Страница 25: ...23 ...

Страница 26: ... and into the cutouts of the needle plate z Lower the presser bar lifter to its raised position again z Press the top feed foot 28 about 2 mm upward against the pressure of the spring and release it z Check that the top feed foot rests only lightly on the presser foot gauge and has no play Adjustment z Loosen screws 24 and 25 z Push counter bearing 29 lightly downward until the top feed foot 28 re...

Страница 27: ...25 z Set guide piece 31 at a clearance of 0 2 mm from cross head 32 fig 14 z Tighten screw 25 Cross check z Turn the handwheel and check for clearance of 0 2 mm ...

Страница 28: ...forwards fig 15 Adjustment z Loosen the two screws 5 z Push feeding eccentric 33 to the right against the bearing z Push bolt 11 to the right until connecting bar 10 is in contact with edge 34 of feeding eccentric 33 z Tighten the screws 5 Cross check z Set the stitch length graduated dial to 6 z Detach spring 35 z Check the joints for easy movement and lack of play z Re attach spring 35 ...

Страница 29: ...ric 33 to the right against the bearing z Push bolt 11 to the right until connecting bar 10 is in contact with edge 34 of feeding eccentric 33 z Push the circlip along with shaft 37 and tooth segment 38 along with actuating crank 39 to the left until no crank or joint has any play anymore z Tighten screws 5 and 36 Cross check z Set the stitch length graduated dial to 6 z Detach spring 35 z Check t...

Страница 30: ...e machine The fabric must not be fed neither forwards nor backwards Precondition 1 The dot markings on the toothed segments must be diametrically opposite each other fig 17 Precondition 2 Eccentric 40 must be in its basic position facing upwards fig 18 Adjustment z Loosen screw 41 with a 5 5 mm spanner z Re position screw 41 until the center lines of the bolts in actuating crank 39 and linkage 42 ...

Страница 31: ...29 Notes ...

Страница 32: ... over the needle bar and push it up against the needle bar frame fig 20 z Place the needle rise clamp 00 870 137 01 onto the needle bar 30 and secure it lightly z Place the 2 mm feeler gauge 00 870 136 01 onto the needle bar with its cutout above the needle rise clamp z Loosen the needle rise clamp and push the 2 mm feeler gauge up against the spacer z Tighten the knurled screw of the needle rise ...

Страница 33: ...dge 34 of feeding eccentric and connection rod 10 are opposite each other fig 19 Cross check z Turn the handwheel back and forth until until the needle rise clamp rests on the spacer The line marks must now be opposite each other z Tighten all three screws 44 very firmly ...

Страница 34: ...on worm 63 z Push worm 63 to the left z Insert the module upwards and at the same time insert pin 64 in the eyelet on connecting bar 65 z Position the automatic unit in such a way that the two screws 61 are located in the center of the slots and the automatic module after having been moved forwards is parallel to the housing z Gently tighten screws 61 z Place circlip 60 onto pin 64 z Install the m...

Страница 35: ...33 ...

Страница 36: ...fig 24 Check z Set adjustment dial 67 at the dot mark z Move push lever 68 back and forth z Lifting pin 66 should now be exactly centered the groove and should not come into contact with the left wall of the groove during operation Adjustment z Loosen screw 69 Fig 25 z Turn adjustment dial 67 until lifting pin 66 is exactly centered in the groove fig 24 z Firmly tighten screw 69 fig 25 Cross check...

Страница 37: ...z Remove connecting rod 65 z Remove fastening screws 75 z Carefully remove the zigzag unit from the machine Fitting z Insert bolt 76 of connecting rod 72 into joint piece 77 of the zigzag unit fig 26 z Fit the zigzag unit in the machine inserting at the same time connecting rod 72 with sliding block 78 into the crank z Position the zigzag unit parallel to the arm shaft and gently tighten fastening...

Страница 38: ...stment z Set stitch width adjustment dial 70 to 0 fig 27 z Set needle position adjustment dial 79 to center z Switch the automatic unit to position E z Loosen screw 73 fig 28 z Rotate setting eccentric 74 downwards z Tighten screw 73 Note When setting eccentric 74 is in its basic position connecting lever 50 must be parallel to the automatic unit adjustment dial ...

Страница 39: ...andwheel and check the centered position of the needle Adjustment z Loosen the three screws 75 on the zigzag stitch unit by just 1 8 of a turn z Turn the handwheel until the needle point is level with the surface of the needle plate fig 31 z Move the zigzag stitch unit to the left or right until the needle is exactly in the center of the needle plate slot fig 32 Note The zigzag stitch unit should ...

Страница 40: ...ion to the small gear wheel z Slowly rotate the handwheel and check the start of the sideways movement of the needle Adjustment z Loosen screw 84 on stop 85 for the left hand needle position z Loosen the three fastening screws 86 on worm 87 z Rotate the handwheel until the point of the rising needle is level with the surface of the needle plate fig 35 The handwheel must not be rotated any further ...

Страница 41: ...39 Cross check z As described under Check ...

Страница 42: ...e needle moves downward on the left side and is at a position of roughly 1 mm above the needle plate z Crank 90 should now rest on stop 85 Adjustment z Set stitch width adjustment dial to 5 z Set needle position adjustment dial to center z Set the adjustment dial on the automatic unit to E z Rotate the hand wheel until the needle moves downward on the left side and is at a position of roughly 1 mm...

Страница 43: ...41 Notes ...

Страница 44: ...d down a little and at the same time check the 0 2 mm clearance between reversing bar 54 and the end of the lever of feeler 91 fig 39 Adjustment z Loosen screw 73 fig 41 z First turn setting eccentric 74 downwards to its basic position z Turn the setting eccentric slightly in a clockwise direction until reversing bar 54 is touching feeler 91 z Turn the setting eccentric back again until a clearanc...

Страница 45: ...43 ...

Страница 46: ... the automatic unit make sure that the two dot marks on the toothed segments are exactly opposite each other fig 43 Fitting z Install the utility stitch unit in the machine z Insert the two long screws 95 and 96 at the bottom and the shorter screw 94 at the top Tighten them lightly fig 41 z Place the feed regulator cranks onto the bolt of actuating crank 10 z Insert bolt 11 z Refit circlip 14 z Mo...

Страница 47: ...45 ...

Страница 48: ...f play by turning the gears back and forth and carry out a visual check of parallel configuration Adjustment z Loosen the three screws 94 95 and 96 and adjust the two gears 97 and 98 so that they are parallel and have no play fig 43 z Tighten the three screws Cross check z As described under Check z Firmly tighten screws 94 95 and 96 Note z The feed regulator cranks must now be adjusted according ...

Страница 49: ...m the front z Loosen fastening screws 75 fig 45 z Carefully remove the zigzag stitch unit from the machine Fitting z Insert bolt 76 of connecting rod 72 into joint piece 77 on the zigzag stitch unit fig 44 z Fit the zigzag stitch unit in the machine inserting at the same time connecting rod 72 with sliding block 78 into the crank z Position the zigzag stitch unit parallel to the arm shaft and gent...

Страница 50: ...ds the left fig 47 Adjustment z Set stitch width adjustment dial 70 to 0 fig 47 z Set needle position adjustment wheel 79 to center z Press straight stitch and zigzag stitch button z Loosen screw 73 fig 49 z Rotate setting eccentric 74 upwards and 45 degrees to the left z Rotate setting eccentric 16 to the left and to the right until the needle is centered in the needle slot fig 48 z Tighten screw...

Страница 51: ... on the automatic utility stitch unit z Turn the handwheel and check the centered position of the needle Adjustment z Loosen the three screws 75 on the zigzag stitch unit by just 1 8 of a turn z Turn the handwheel until the needle point is level with the surface of the needle plate fig 31 z Move the zigzag stitch unit to the left or right until the needle is exactly in the center of the needle pla...

Страница 52: ...heck the start of the sideways movement of the needle by simultaneously touching the back side of the needle bar frame and the machine head with the index finger of your left hand while turning the handwheel very slowly with your right hand Adjustment z Loosen the two screws 101 fig 52 z Turn the handwheel in sewing direction until the needle rises on the left hand side and the needle point is pos...

Страница 53: ...51 ...

Страница 54: ...nsert a new needle z Set zigzag stitch adjustment dial to 5 z Set needle position adjustment dial to center z Press zigzag stitch button z Turn the handwheel and check the left and the right clearance in the slot Adjustment z Loosen screw 84 fig 38 and move stop 85 to the left z Loosen screw 73 fig 55 z Rotate setting eccentric 74 until the two clearances are equal z Tighten screw 73 Cross check z...

Страница 55: ...s downward on the left side and is at a position of roughly 1 mm above the needle plate fig 56 z Press the button for the buttonhole bartack The needle should now move approximately 0 2 mm to the left Adjustment z Set stitch width adjustment dial to 5 z Set needle position adjustment dial to center z Press the zigzag stitch button z Loosen screw 84 fig 38 z Push stop 85 to a position 0 2 mm from t...

Страница 56: ...side of the needle on which the scarf is located Needle bar height The needle bar height must be set in such a way that the sewing hook point can easily enter the thread loop above the needle eye at straight stitch and zigzag stitch settings Hook to needle clearance The distance of the sewing hook point from the needle must be as small as possible so that the sewing hook point does not miss the th...

Страница 57: ...Vertical rotary hook CB shuttle complete Shuttle body Bobbin case Bobbin Beak shuttle complete Bobbin Hook complete Hook body Hook gib Bobbin case base Bobbin case cap Bobbin Hook complete Hook body Hook gib and needle guard Bobbin case base Bobbin case cap Bobbin Hook complete Hook body Hook gib and needle guard Bobbin case base Bobbin case cap Bobbin ...

Страница 58: ... the needle plate Adjustment of the needle in the needle slot of the presser foot z Loosen screw 104 fig 58 z Move bolt 105 together with collar and needle bar frame 106 to the front or the rear until the needle is exactly in the middle of the needle slot in the presser foot z Tighten screw 104 Cross check z Raise the needle by turning the handwheel z Place a piece of paper under the presser foot ...

Страница 59: ...57 Cross check z Carry out a visual check at straight and zigzag stitch settings ...

Страница 60: ...point and the bottom of the needle scarf z Check the axial play of hook 107 to hook shaft bushing 109 Adjustment z If the hook shaft has axial play loosen the two screws 108 fig 61 z Push bevel gear 111 with the shaft to the front and sewing hook 108 to the rear z Tighten the two screws 108 z Loosen screw 112 in the lifting eccentric by 2 3 turns z Loosen screw 110 slightly z Turn handwheel and se...

Страница 61: ...e bevel gears must move easily and without play Adjustment z Push bevel gear with lifting eccentric to the left until it rests on bevel gear 38 without play z Tighten screw 37 on the surface of the drive shaft Check z As described under Requirement ...

Страница 62: ... is any play on the feeler gauge repeat this procedure z Remove the 2 2 mm feeler gauge z Turn the handwheel in sewing direction until the needle rise clamp rests on the spacer This means that the needle has moved upwards by 2 2 mm to the needle rise position The hook point must now be exactly behind the center line of the needle fig 62 Adjustment z If the setting is not correct remove the needle ...

Страница 63: ...61 ...

Страница 64: ... eye and the lower edge of the sewing hook point must be 0 5 mm at the widest left zigzag penetration fig 66 Check z Press the button for the widest zigzag stitch z Turn the handwheel until the needle rises at the left zigzag stitch and the sewing hook point is exactly behind the needle center line z The clearance between the top edge of the needle eye and the lower edge of the sewing hook point m...

Страница 65: ...st be possible to insert clearance gauge 00 880133 01 with ease but without play between the position finger and the bottom of the groove in the bobbin case base fig 68 Adjustment z Loosen the two screws 114 z Insert clearance gauge z Press bobbin case position finger 113 against the gauge at an angle of 90 degrees z Tighten the two screws 114 Cross check z As described under Check ...

Страница 66: ...the top and bottom edge of the needle eye fig 69 z Tighten screw 119 in this position Cross check 1 z Use the button to move threader prong 115 to the rear and to the front again z At the same time carry out a visual check of the prong height Lateral adjustment z Use button 116 to turn the threader prong 115 to the front into the needle eye z Loosen screw 120 by just 1 8 of a turn fig 70 z Move pr...

Страница 67: ...65 ...

Страница 68: ...a level of 1 mm below the bobbin rim Check z Wind a bobbin and check that the winder stops as required Adjustment z Loosen screw 123 fig 72 z Position stop 124 to the left for less thread and to right for more thread z Tighten screw 123 Cross check z Wind a bobbin and check that the winder stops as required ...

Страница 69: ... upward movements of the hand the thread must run off gradually fig 73 z There must not be any thread waste under the tension spring z The tension spring must rest evenly and parallel on the bobbin case Adjustment z Loosen the knurled screw a little and turn it in again until a resistance is felt when the thread is pulled off Cross check z As described under Check Note z Once the bobbin thread ten...

Страница 70: ...et stitch length to 2 0 z Place a piece of fabric under the zigzag foot and sew z Press the button for straight stitch z Set stitch length to 2 5 z Sew with straight stitch Adjustment z First turn knurled nut 125 fully to the left fig 76 z Press the button for the widest zigzag stitch z Set stitch length to 2 0 z Sew with zigzag stitch z At the same time turn the knurled nut gradually in clockwise...

Страница 71: ...69 ...

Страница 72: ... lower edge of the needle eye ent ers the fabric Check z Press the straight stitch button z Set stitch length to 6 0 z Place two layers of fabric under the presser foot z Sew a few stitches z Turn the handwheel and determine the end of the thread check spring stroke Correct slackening of the needle thread takes place when it enters the needle eye not tautly but in a loose curve Adjustment z Loosen...

Страница 73: ...71 ...

Страница 74: ...ho le seams are normally the same section 11 of this manual Check z Sew a buttonhole with gimp thread and compare the two stitch lengths Adjustment z If right buttonhole seam has longer stitch length than left one fig 79 turn setting eccentric slightly to the front in direction A fig 81 z If left buttonhole seam has longer stitch length than right one fig 80 turn setting eccentric slightly to the ...

Страница 75: ...r the presser foot and sew the honeycomb stitch Adjustment z Loosen hexagon head screw 129 by just 1 8 of a turn using a 5 5 mm spanner fig 82 z Loosen screw 130 by approx 2 turns z Tighten screw 129 just a little z Sew the honeycomb stitch The stitch length of the honeycomb stitch should now be a bit too long z Loosen screw 129 z Tighten screw 130 just a little z Slightly tighten screw 129 z Sew ...

Страница 76: ...as any particular requirements these should be produced on a separate sample The following is a sewing sample made on the PFAFF 1540 Stitch program Stitch length Presser foot No 1 Straight stitch 2 5 Zigzag foot 0 2 Zigzag stitch 2 0 Zigzag foot 0 3 Decorative stretch stitch 1 0 Zigzag foot 0 4 Honeycomb stitch Zigzag foot 0 5 Stretch triple straight stitch Zigzag foot 0 6 Stretch triple zigzag st...

Страница 77: ...complete with pressure piece 137 and the three tensi on disks 138 139 and 140 Fitting z Insert tension stud 136 with the three tension disks and fit pressure piece z Cement tension stud into the mounting plate with Onmivit Rapid z Push pressure spring 135 and knurled nut 125 onto tension stud 136 z Insert guide 134 with its right side and fully screw in knurled nut 125 z Push on adjustment dial 13...

Страница 78: ...ide groove fig 96 z First place clutch piece 145 onto the handwheel boss then press it towards the back The pressure spring is thus placed vertical and the clutch piece is positioned as shown in fig 97 z Push the pin of pawl 144 into the hole in such a way that it is positioned as shown in fig 98 z Push handwheel release disk 143 with its square mark 150 facing up into the handwheel fig 99 z In or...

Страница 79: ...77 ...

Страница 80: ...t into the bobbin case base fig 104 z Insert the bobbin case base complete with sewing hook gib into the sewing hook fig 105 z Secure the sewing hook gib from behind with three screws with springs fig 100 z Screw on and adjust the bobbin case position finger 45 Cleaning and oiling the machine Note The machine is equipped with sintered bearings and components and is therefore maintenance free for t...

Страница 81: ...79 ...

Страница 82: ...ll gear 97 to the right z Move the automatic utility stitch unit a little to the front and remove toothed belt 158 between the large gear and the shaft end Refitting z Insert the new toothed belt 158 for the machine between the large gear and the end of the shaft and mount it on the lower belt sprocket 159 z Tighten the three screws 94 95 and 96 on the automatic utility stitch unit z Pull toothed ...

Страница 83: ...81 ...

Страница 84: ... turn arm shaft crank 153 in sewing direction until the needle rise clamp rests on the spacer z The sewing hook point must now be exactly opposite the center line of the rear side of the needle z If this is not the case turn simultaneously handwheel and arm shaft crank 153 until the sewing hook is exactly opposite the center line of the rear side of the needle with the clamp resting on the spacer ...

Страница 85: ...83 ...

Страница 86: ... hook fig 112 z Remove the entire sewing hook 107 to the top z Remove the entire connecting bar 10 from actuating crank 39 fig 111 z Move connecting bar 10 as far as possible to the left z Push driving eccentric 33 to the left z Knock out hollow pin 161 fig 110 z Remove the circlip with a screwdriver z Push the plastic washer a little to the left z Remove screw 112 of the lifting eccentric fig 111...

Страница 87: ...85 ...

Страница 88: ...ing eccentric 33 to the right Note Hollow pin 161 must always be visible on driving eccentric 33 on the opposite side of screw 112 in the lif ting eccentric z Place connecting bar 10 complete onto actuating crank 39 fig 111 z Insert bolt 11 z Insert washer 14 z Adjust feed regulator cranks in accordance with section 7 z Refit the feed dog lowering mechanism z Connect pull spring 6 z Push the small...

Страница 89: ...87 ...

Страница 90: ...z Before refitting the motor simulated leakage current must be measured see section 58 of this manual z Insert the motor and place motor sprocket 58 in toothed belt 59 fig 113 z Install the sewing lamp wire at the motor and attach plug 46 z Insert and slightly tighten top motor retaining screw 56 z Insert and slightly tighten right motor retaining screw 57 z Tension toothed belt 59 and firmly tigh...

Страница 91: ...89 ...

Страница 92: ...emove the three screws 165 z Remove circuit board 164 Refitting z Solder the two cables to points 168 at the top of the new circuit board z Insert circuit board 164 z Insert the three screws 165 in contact pins 167 and firmly tighten z Push cover 162 onto one side and allow it to engage on the other z Measure the simulated leakage current in accordance with section 58 of this manual z Fit the moto...

Страница 93: ...remove carbon brushes 169 z Clean the collector and the motor Refitting z Insert the two new carbon brushes and re attach the torsion springs z Refit end shield 171 z Insert the two groove nuts 170 and firmly tighten z Insert cover 162 onto one side and allow it to engage on the other z Measure the simulated leakage current in accordance with section 58 of this manual z Fit the motor in accordance...

Страница 94: ...ewdrivers in opposite directions thus prizing pinion 58 off the shaft Note The old motor pinion gear is no longer usable Refitting z Support the rotor shaft at the opposite end and push on the new motor pinion z Measure the simulated leakage current in accordance with section 58 of this manual z Fit and glue on outer disk 172 z Fit the motor in accordance with section 49 z Carry out an electrical ...

Страница 95: ...rt the new toothed belt 59 and press it up until there is enough space for the handwheel fig 117 z Insert handwheel and place the toothed belt 59 correctly onto the handwheel pinion z Insert handwheel screw 142 and moderately tighten it z Fit the toothed belt onto motor pinion 58 z Secure the motor with screws 56 and 57 and at the same time adjust the belt tension z Refit plastic cap 141 z Refit t...

Страница 96: ...t board Refitting z Insert the complete new circuit board making sure that the switch fits into the guide of the pre selection slide z Insert the two Phillips screws 176 and firmly tighten z Turn the potentiometer counter clockwise until the crank journal is at the top z In this position insert spring 173 and pressure piece 174 z Connect cables 187 to the printed circuit board z Refit pedal 175 z ...

Страница 97: ...ains connection cables or machine cables 177 from the circuit board fig 120 z Loosen screw 178 or 179 z Remove mains lead cleat 180 z Remove mains connection cable or machine cable Refitting z Insert new cable 177 through the bore z Insert mains lead cleat 180 and secure with screw 173 or 174 z Connect mains connection cables or machine cables 177 z Refit pedal 175 z Use a screwdriver with a wide ...

Страница 98: ... LCD shows the respective value 230 V 10 z The contact field is located a bit to the right just below the knob for the measuring range Touch this field with your finger to check the ground lead of the electrical outlet Signal lamp PE just above the contact field will light up if the ground lead is out of order z Insert plug of sewing machine into the main power connection of ABB Metrawatt M 5013 z...

Страница 99: ...urrent test Milliampere mA z Leave sewing machine plug in tester connection z Use clamp to attach test lead of testing appliance M 5013 to presser bar z Set testing range switch at 20 mA fig 124 z Meter reading 0 50 mA maximum ...

Страница 100: ...98 ...

Страница 101: ...m 59 Measures required in case of incorrect readings Re I If one of the four test functions is a failure the grounded electrical outlet is defective Take necessary steps to repair the electrical outlet Re II If the current consumption deviates considerably from the indicated value even though the machine does not bind the motor is defective and must be exchanged or repaired Re III If the insulatio...

Страница 102: ...100 Notes ...

Страница 103: ...101 Notes ...

Страница 104: ...102 Notes ...

Страница 105: ...103 Notes ...

Страница 106: ...uckerei Gablenz GmbH Stettiner Straße 17 76356 Weingarten Printed in Germany Technische Änderungen vorbehalten Subject to alterations in design Sous toute réserve de modifications techniques Salvo modificaciones técniche Con riserva di modifiche tecniche No BP 00059 B Th Göb ImageDesign e mail info tg imagedesign de www tg imagedesign com ...

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