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SERVICING MANUAL

502X

www.promelectroavtomat.ru

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Summary of Contents for 502X

Page 1: ...SERVICING MANUAL 502X www promelectroavtomat ru ...

Page 2: ... STRETCH STITCH BALANCE 14 FEED DOG HEIGHT 15 NEEDLE BAR HEIGHT 16 NEEDLE TO SHUTTLE TIMING 17 NEEDLE CLEARANCE TO SHUTTLE 18 BACKLASH BETWEEN LOWER SHAFT GEAR AND SHUTTLE HOOK GEAR 19 NEEDLE POISITION MISALIGNMENT 20 ZERO FEEDING 21 BUTTONHOLE STITCH BALANCE 22 ZERO FEEDING OF BUTTONHOLE BARTACK 23 BUTTONHOLE FUNCTION 24 REPLACEMENT AND ADJUSTMENT OF NEEDLE THREADER PLATE 25 MOTOR BELT TENSION 26...

Page 3: ...ng dial Face cover Thread cutter Needle threader Needle plate Hook cover Extension table Accessory box Hook cover plate release button Reverse stitch button Drop feed lever Carrying handle Bobbin winder spindle Bobbin winder stopper Handwheel Pattern selector dial Feed balancing dial Power switch Machine socket Free arm Buttonhole lever Presser foot lifter Additional spool pin hole www promelectro...

Page 4: ...HANICAL P 16 BAR HEIGHT ADJUSTMENT NEEDLE BAR HEIGHT 8 INAPPROPRIATE NEEDLE SEE MECHANICAL P 17 TO SHUTTLE TIMING ADJUSTMENT NEEDLE TO SHUTTLE TIMING 9 INAPPROPRIATE NEEDLE SEE MECHANICAL P 18 TO SHUTTLE CLEARANCE ADJUSTMENT NEEDLE CLEARANCE TO SHUTTLE 2 FABRIC NOT 1 PRESSER FOOT PRESSURE ADJUST THE PRESSER BAR MOVING IS TOO WEAK LEVEL TO MAKE THE PRESSURE STRONGER 2 INCORRECT F D HEIGHT SEE MECHA...

Page 5: ...LY BOBBIN BOBBIN 2 TOO MUCH THREAD IS ADJUST THE POSITION OF ON THE BOBBIN STOPPER 3 LINT IS STUCK INSIDE THE CLEAN THE SHUTTLE BOBBIN HOLDER 4 THREAD QUALITY IS CHANGE TO A HIGHER QUALITY TOO LOW SEWING THREAD 5 THREAD IS JAMMING CLEAR OUT THE JAMMING AROUND THE BOBBIN THREAD 5 NEEDLE 1 NEEDLE IS HITTING THE SEE MECHANICAL P 20 BREAKS NEEDLE PLATE ADJUSTMENT NEEDLE POSITION 2 NEEDLE IS BENT OR WO...

Page 6: ... 7 DEFORMATION 1 INAPPROPRIATE FEED SEE MECHANICAL P 14 PATTERN BALANCE ADJUSTMENT STRETCH STITCH BALANCE 2 INAPPROPRIATE ZIGZAG SEE MECHANICAL P 11 SYNCHRONIZATION ADJUSTMENT NEEDLE SWING 3 UPPER THREAD TENSION SEE MECHANICAL P 9 IS TOO STRONG ADJUSTMENT TOP TENSION 8 IMPROPER 1 BUTTONHOLE STITCH SEE MECHANICAL P 22 BALANCE IS NOT CORRECT ADJUSTMENT BUTTONHOLE STITCH BALANCE 2 CHANGING TO BAR TAC...

Page 7: ...NG FROM THE BACK OF THE SPOOL 1 DRAW THE THREAD THROUGH THE THREAD GUIDE 2 HOLDING THE THREAD TAUT WITH YOUR RIGHT HAND DRAW THE THREAD DOWN INTO THE TENSION AREA AND THEN AROUND THE CHECK SPRING HOLDER 3 FIRMLY DRAW THE THREAD UP AND THROUGH THE TAKE UP LEVER FROM RIGHT TO LEFT 4 PULL THE THREAD TO THE LEFT AND SLIP IT INTO THE NEEDLE BAR THREAD GUIDE 5 THREAD THE NEEDLE FROM FRONT TO BACK NOTE Y...

Page 8: ...TO REPLACE FOLLOW THE ABOVE PROCEDURE IN REVERSE FREE ARM LEGS COVER TO REMOVE 1 REMOVE THE SETSCREW C 2 REMOVE THE FREE ARM LEGS COVER D TO ATTACH TO REPLACE FOLLOW THE ABOVE PROCEDURE IN REVERSE SETSCREW C FREE ARM LEGS COVER D FACE COVER FACE COVER A SETSCREW B www promelectroavtomat ru ...

Page 9: ... PATTERN SELECTOR DIAL K AND SETSCREWS A G 3 LOOSEN SETSCREW H 4 DISENGAGE THE FRONT COVER HOOK I J AND THEN REMOVE THE FRONT COVER TO ATTACH TO REPLACE FOLLOW THIS PROCEDURE IN REVERSE PATTERN SELECTOR DIAL K A B C D E F G H I J SERVICE ACCESS 2 FRONT COVER www promelectroavtomat ru ...

Page 10: ...ND FREE ARM LEGS COVER AND THE FRONT COVER SEE PAGE 6 7 2 REMOVE THE SETSCREWS A B C D AND THE REAR COVER TO ATTACH TO REPLACE FOLLOW THE ABOVE PROCEDURE IN REVERSE REAR PANEL SERVICE ACCESS 3 REAR PANEL A B B C D www promelectroavtomat ru ...

Page 11: ...UT OF THE STANDARD RANGE ADJUST IT AS FOLLOWS PULLING SPEED FOR THE NEEDLE THREAD IS APPROXIMATELY 59 MM SECOND 2 REMOVE THE FACE COVER AND TURN THE ADJUSTING SCREW WITH THE SCREWDRIVER IF THE TOP TENSION IS TOO TIGHT TURN THE ADJUSTING SCREW D IN DIRECTION A IF THE TOP TENSION IS TOO LOOSE TURN THE ADJUSTING SCREW D IN DIRECTION B 3 ATTACH THE FACE COVER B C A ADJUSTING SCREW D MECHANICAL ADJUSTM...

Page 12: ...E BETWEEN THE PRESSER FOOT AND THE NEEDLE PLATE TO 6 0 MM 0 24 2 TIGHTEN THE SETSCREW D SECURELY 3 ATTACH THE FACE COVER PRESSER FOOT LEVER B SETSCREW 4 X 8 D SHOULD BE PARALLEL FEED DOG SLITS F NOTE WHEN YOU TIGHTEN THE SETSCREW MAKE SURE THAT BOTH SIDES OF THE PRESSER FOOT ARE PARALLEL TO THE FEED DOG SLOTS F ON THE NEEDLE PLATE PRESSER FOOT ALIGNMENT FEED DOG HEIGHT OF PRESSER FOOT N E E D L E ...

Page 13: ...R SHAFT WORM IN PLACE CAREFULLY TURN THE HANDWHEEL AND ADJUST SO THAT LATERAL NEEDLE SWING STARTS FROM A POSITION 2 MM 0 08 TO 3 MM 0 12 ABOVE THE NEEDLE PLATE IN RIGHT OUTFLOW MOTION 5 TIGHTEN THE TWO HEXAGONAL SOCKET SCREWS ON THE UPPER SHAFT WORM 6 ATTACH THE FRONT COVER AND FACE COVER NOTE MAKE SURE THAT THERE IS NO BACKLASH BETWEEN THE UPPER SHAFT WORM AND CAM BLOCK GEAR AND THE UPPER SHAFT S...

Page 14: ...EEDLE PLATE HOLE REMOVE THE FACE COVER AND LOOSEN THE SETSCREW C AND ADJUST THE NEEDLE DROP POSITION BY TURNING THE ECCENTRIC PIN NOTE WHEN ADJUSTING THE NEEDLE DROP POSITION MAKE SURE THE ECCENTRIC PIN SHOULD SIT WITH ITS HEAD OFF CENTERED DOWNWARD 4 AFTER THE ADJUSTMENT OF NEEDLE DROP POSITION TIGHTEN SETSCREW C AND ATTACH THE FACE COVER MECHANICAL ADJUSTMENT SETSCREW 3 X 4 C ECCENTRIC PIN D NEE...

Page 15: ...ER SEE PAGE 6 AND 7 2 SET THE PATTERN SELECTOR DIAL AT AND THE ZIGZAG WIDTH DIAL AT 5 AND CHECK BOTH NEEDLE DROP POSITIONS WITH THE MAXIMUM ZIGZAG WIDTH 3 IF THE BOTH NEEDLE DROP POSITIONS ARE NOT EQUAL LOOSEN THE SETSCREW A AND TURN THE NUT TO ADJUST THE NEEDLE DROP POSITION 4 TIGHTEN THE SETSCREW A AND ATTACH THE FRONT COVER FREE ARM LEGS COVER AND FACE COVER NEEDLE DROP 2 MECHANICAL ADJUSTMENT ...

Page 16: ...TOWARD YOU TO CHECK THE FORWARD AND BACKWARD NEEDLE DROP POSITIONS 5 REMOVE THE CAP AS SHOWN BELOW IF THE REVERSE STITCH LENGTH B IS SHORTER THAN THE FORWARD STITCH LENGTH A TURN THE ADJUSTING SETSCREW IN THE DIRECTION OF C IF THE REVERSE STITCH LENGTH B IS LONGER THAN THE FORWAERD STITCH LENGTH A TURN THE ADJUSTING SETSCREW IN THE DIRECTION OF D MECHANICAL ADJUSTMENT CAP ADJUSTING SCREW STRETCH S...

Page 17: ...ower the foot 3 Loosen the setscrew A 4 Turn the handwheel to bring the feed dog to its highest position 5 If the feed dog height is lower than 0 8 mm Turn the adjusting screw B in the direction of C 6 If the feed dog height is higher than 0 9 mm Turn the adjusting screw B in the direction of D 7 Tighten the setscrew A Presser foot Feed dog Upper surface of needle plate 0 8 0 9 mm Setscrew A Adjus...

Page 18: ...the needle plate A and bobbin holder B 3 Turn the handwheel until the tip of the hook meets with the right side of the needle 4 Remove the face cover and loosen the setscrew C 5 Adjust the needle bar height by moving the needle bar up or down 6 Tighten the setscrew C Note Be sure that the groove on the needle bar is facing right in the front 7 Attach the face cover bobbin case and needle plate Set...

Page 19: ...e to its lowest position 5 Loosen the 2 setscrews C in the lower shaft gear 6 Turn the handwheel to raise the needle bar 3 4 mm from the lowest position 7 Rotate the lower shaft gear until the hook point meets the right side of the needle while holding the handwheel in place 8 Tighten the setscrews C 9 Attach the front cover 10 Attach the bobbin holder needle plate and presser foot Mechanical Adju...

Page 20: ...THE SHUTTLE HOOK LOOSEN THE SETSCREW C AND MOVE THE NEEDLE BAR SUPPORTER BACK OR FORTH AS SHOWN BY THE ARROW TO ADJUST THE CLEARANCE WITHIN A RANGE OF 0 10 TO 0 05 MM 6 TIGHTEN THE SETSCREW C 7 SET THE ZIGZAG WIDTH DIAL AT 5 TURN THE HANDWHEEL TOWARD YOU TO CHECK THE NEEDLE CLEARANCE AT BOTH LEFT AND RIGHT NEEDLE DROP POSITION 8 ATTACH THE FACE COVER 9 ATTACH THE BOBBIN HOLDER B NEEDLE PLATE A AND...

Page 21: ...ON D WHEN THE PLAY AT THE TIP OF SHUTTLE HOOK IS TOO SMALL 6 TIGHTEN THE SETSCREW E 7 ATTACH THE FRONT COVER 8 INSERT THE BOBBIN HOLDER B AND ATTACH THE NEEDLE PLATE A MECHANICAL ADJUSTMENT BACKLASH BETWEEN LOWER SHAFT GEAR AND SHUTTLE HOOK GEAR NEEDLE PLATE SET SCREWS HOOK BOBBIN HOLDER B GROOVE SETSCREW E LOWER SHAFT BUSHING LOWER SHAFT GEAR SHUTTLE HOOK GEAR LOWER SHAFT BUSHING GROOVE POSITION ...

Page 22: ...TO THE BOTTOM OF THE SLOT ON ZIGZAG REGULATOR ARM B 3 TIGHTEN THE SETSCREW A SWING THE ZIGZAG WIDTH REGULATOR ARM B AS SHOWN BY THE ARROW TO CHECK IF THE NEEDLE BAR DOES NOT MOVE SIDEWISE IF THE NEEDLE BAR STIL MOVES LOOSEN THE SETSCREW A AND MOVE THE ZIGZAG WIDTH ADJUSTING PLATE D UNTIL THE NEEDLE BAR STOPS MOVING SIDEWISE WHEN SWINGING THE ZIGZAG WITH REGULATOR ARM 4 ATTACH THE FRONT COVER MECHA...

Page 23: ... ON THE NEEDLE PLATE TURN THE HANDWHEEL TOWARD YOU SLOWLY BY HAND AND CHECK THE MOVEMENT OF A PAPER 3 IF THE PAPER MOVES FORWARD REMOVE THE CAP AND TURN THE ADJUSTING SCREW IN DIRECTION A IF THE PAPER MOVES BACKWARD TURN THE ADJUSTING SCREW IN DIRECTION OF B MECHANICAL ADJUSTMENT ADJUSTING SCREW CAP A B www promelectroavtomat ru ...

Page 24: ... AGAINST 9 12 STITCHES OF LEFT SIDE BACKWARD ADJUSTMENT PROCEDURE 1 SEW A BUTTONHOLE AND CHECK THE STITCHES 2 PULL OUT THE PATTERN SELECTOR DIAL 3 IF THE RIGHT SIDE OF THE BUTTONHOLE IS TOO COARSE TURN THE ADJUSTING SCREW IN THE DIRECTION OF C IF THE LEFT SIDE OF THE BUTTONHOLE IS TOO COARSE TURN THE ADJUSTING SCREW IN THE DIRECTION OF D 4 INSERT THE PATTERN SELECTOR DIAL MECHANICAL ADJUSTMENT PAT...

Page 25: ... PATTERN SELECTOR DIAL 3 PLACE A PIECE OF FABRIC ON THE NEEDLE PLATE LOWER THE PRESSER FOOT AND SEW IF THE FABRIC MOVES FOREWARD TURN THE ADJUSTING SCREW IN DIRECTION OF A IF THE FABRIC MOVES BACKWARD TURN THE ADJUSTING SCREW IN DIRECTION OF B 4 AFTER THE ADJUSTMENT ATTACH THE PATTERN SELECTOR DIAL MECHANICAL ADJUSTMENT ZERO FEEDING ADJUSTING SCREW PATTERN SELECTOR DIAL A B www promelectroavtomat ...

Page 26: ... BH LEVER KNOB SLIGHTLY TOUCHES THE END OF THE STOPPER 3 IF THE BUTTONHOLE SEWING STEP 2 SWITCHES OVER TO STEP 3 BARTACK SEWING TOO SOON TURN THE ADJUSTING SCREW IN DIRECTION OF E IF THE BUTTONHOLE SEWING STEP 2 DOES NOT SWITCH OVER TO STEP 3 BARTACK SEWING TURN THE ADJUSTING SCREW IN DIRECTION OF F MECHANICAL ADJUSTMENT BARTACK IS SEWN TOO EARLY BARTACK IS NOT SEWN TOUCHING BH FOOT R BH LEVER ADJ...

Page 27: ...T OF THREADER PLATE 3 IF THE FOOK D IS TOUCHING THE RIGHT OR LEFT SIDE OF NEEDLE EYE LOOSEN THE SETSCREW E AND SLIDE THE THREADER PLATE H SEE DRAWING2 4 IF THE HOOK D IS TOUCHING THE TOP OR BOTTOM SIDE OF NEEDLE EYE REMMOVE THE FACE COVER AND LOOSEN THE SETSCREW F AND ADJUST THE THREADER POSITION SET PLATE G MECHANICAL ADJUSTMENT THREADER KNOB HOOK D THREADER POSITION SET PLATE G SETSCREW F THREAD...

Page 28: ...MP OVER THE PULLEY 2 THE CORRECT MOTOR BELT TENSION IS ACHIEVED WHEN THE BELT PUSHES IN ABOUT 7 MM 0 28 9 MM 0 36 UNDER A PRESSURE OF ABOUT 300 GRAMS ADJUSTMENT PROCEDURE 1 REMOVE THE FRONT COVER SEE PAGE 7 2 LOOSEN SETSCREWS A 3 MOVE THE MOTOR UP OR DOWN TO ADJUST THE DEFLECTION TO ABOUT 7 MM 0 28 9 MM 0 36 4 TIGHTEN SETSCREWS A MECHANICAL ADJUSTMENT SETSCREWS A MOTOR DEFRECTION 7 9 MM 300g LOAD ...

Page 29: ...27 WIRING OF TERMINAL BLOCK RIDGE RIDGE FROM MOTOR FROM LAMP SOCKET www promelectroavtomat ru ...

Page 30: ...TILL CHECK FOR POSSIBLE LUBRICATION NEEDS WHENEVER SEEVICING MACHINES OIL USE GOOD QUALITY SEWING MACHINE OIL AT THE POINTS A B C D E F G H INDICATED BY THE BLACK ARROWS GREASE USE WHITE GREASE SUCH AS MOLYCOTE EM 40M AT THE POINTS I J K INDICATED BY THE WHITE ARROES A B C D E F G H I J K www promelectroavtomat ru ...

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