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SERVICING MANUAL

JF SERIES MODELS

www.promelectroavtomat.ru

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Summary of Contents for JF Series

Page 1: ...SERVICING MANUAL JF SERIES MODELS www promelectroavtomat ru...

Page 2: ...DLE DROP 11 HEIGET OF FEED DOG 12 CLEARANCE BETWEEN NEEDLE AND HOOK NO 1 13 CLEARANCE BETWEEN NEEDLE AND HOOK NO 2 14 NEEDLE BAR HEIGHT 15 HOOK TIMING 16 FEED BALANCE ON STRETCH STITCH 17 BUTTOHOLE FE...

Page 3: ...DLE PROPERLY CHANGE THE NEEDLE RETREAD USE THE RECOMMENDED SEWING NEEDLE AND THREAD USE A 11 BLUE TIP NEEDLE SEE MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT SEE MECHANICAL ADJUSTMENT HOOK TIMING SEE MECHA...

Page 4: ...HE NEEDLE PLATE P 7 4 BREAKNG BOBBIN THREAD 1 INCORRECTLY THREADED BOBBIN CASE 2 TOO MUCH THREAD IS AROUND IN THE BOBBIN 3 LINT IS STUCK INSIDE THE BOBBIN HOLDER 4 THREAD QUALITY IS TOO LOW 5 THREAD I...

Page 5: ...LOOSE 5 NOT ENOUGH OIL SEE MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK NO 2 ELIMINATE THE LOOSENESS SEE MECHANICAL ADJUSTMENT MOTOR BELT TENSION ELIMINATE THE LOOSENESS OIL ALL MOVEING PA...

Page 6: ...HE BELT COVER BY REMOVING THE BELT COVER RIB FROM THE FRONT COVER TO ATTACH 2 MOUNT THE BELT COVER RIB TO THE FRONT COVER AND THEN MOUNT THE BELT COVER BY THE SET SCREW BASE COVER TO REMOVE 1 REMOVE T...

Page 7: ...ECTOR DIALS IS AS FOLLOWS MODEL JF1022 3 DIALS MODEL JF1004 1 DIAL JF1018 MODEL JF1018S JF1014 2 DIALS JF1012 3 LOOSEN SET SCREWS C D E F G AND THEN REMOVE THE FRONT COVER BY REMOVING SET SCREW H I AN...

Page 8: ...C D E F AND G 4 PULL UP THE 2 SPOOL PINS I AND J AND LOWER THE PRESSER FOOT LIFTER K 5 WHILE PUSHING THE REAR COVER L NEAR THE NOTCHES L AND M PULL UPPER PART OF THE REAR COVER SEE X BELLOW 6 PULL LO...

Page 9: ...MAKE SURE THE FOOT SHOULD BE LOWERED IF THE TENSION IS OUT OF THE STANARD RANGE ADJUST IT AS FOLLOWS TO ADJUST 1 REMOVE THE FRONT COVER UNIT SEE PAGE 5 2 TURN THE ADJUSTING NUT C IN THE DIRECTION OF D...

Page 10: ...SION SHOULD BE 45g 55g WHEN PULLING THE THREAD IN THE DIRECTON OF B IF THE TENSION IS OUT THE RANGE ADJUST IT AS FOLLOWS TO ADJUST 1 TURN THE ADJUSTING SCREW C IN THE DIRECTION OF D WHEN THE BOBBIN TH...

Page 11: ...PRESSER FOOT AND LOOSE PRESSER BAR BRACKET SCREW AND ADJUST THE HEIGHT 6 0mm 4 CHECK IF THE PRESSER FOOT IS PARALLEL TO THE OPEINIGS FOR THE FEED DOG ON THE NEEDLE PLATE IF NOT ADJUST IT 5 TIGHTEN THE...

Page 12: ...ZIGZAG WIDTH AND REMOVE THE FRONT COVER SEE PAGE 5 2 LOOSEN TWO SET SCREWS 3 ADJUST THE NEEDLE SWING BY TURNING THE BALANCE WHEEL WHILE PRESSING THE WORM SO AS NOT TO ROTATE IT UNTIL THE NEEDLE SWING...

Page 13: ...UAL IF NOT MAKE AN ADJUSTMENT AS FOLLOWS TO ADJUST 1 REMOVE THE FACE PLATE SEE PAGE 4 2 SET THE PATTERN SELECTOR DIAL AT MAXIMUM IGZAG WIDTH 3 LOOSEN THE SET SCREW 4 TURN THE ECCENTRIC PIN TO ASJUST T...

Page 14: ...T 1 SET THE STITCH LENGTH DIL AT 4 PATTERN SELECTOR AIAL AT ANY POSITION 2 LOWER THE PRESSER FOOT AND TURN THE BALANCE WHEEL UNTIL THE FEED DOG COMES TO ITS HIGHEST POINT 3 LOOSEN THE SET SCREW A 4 TU...

Page 15: ...TO ARROWS TO GET CLEARANCE BETWEEN 0 mm TO 0 15 mm WHEN CLEARANCE IS TOO WIDE MOVE THE NEEDLE BAR SUPPORTER TO DIRECTION B WHEN CLEARANCE IS TOO NARROW MOVE THE NEEDLE BAR SUPPORTER TO DIRECTION C NO...

Page 16: ...RACE IN THE RANGE OF 0 mm 0 15 mm 4 SET THE PATTERN SELECTOR DIAL AT C TURN THE BALANCE WHEEL TO CHECK IF THE CLEARANCE BETWEEN THE NEEDLE AND INNER EDGES OF THE SHUTTLE RACE SPRING AT THE LEFT AND R...

Page 17: ...MODEL JF1004 SET THE PATTERN SELECTOR DIAL AT FOR MODEL JF1022 AD JF1018 SET THE PATTERN SELECTOR DIAL AT A SET THE WIDTH SELECTOR DIAL AT 0 3 REMOVE THE SHUTTLE RACE RING 4 TURN THE BALANCE WHEEL TOW...

Page 18: ...NCE WHEEL TOWARD YOU UNTIL THE TIP OF SHUTTLE HOOK MEETS THE LEFT SIDE OF NEEDLE 6 LOOSEN THW LOWER SAHAFT CRANK ARM SET SCREW 2 PCS 7 WHILE HOLDING THE SHUTTLE HOOK NUT TO TURN TURN THE BARANCE WHEEL...

Page 19: ...STRETCH STITCH PATTERNS MAKE AN ADJUSTMENT AS FOLLOWS TO ADJUST 1 REMOVE THE CAP 2 SET THE PATTERN SELECTOR DIAL AT A AND THE STITCH LENGTH DIAL AT SS FOR MODELS JF1022 AND JF1018 SET THE PATTERN SELE...

Page 20: ...THE LEFT SIDE ROW FORWARD FEEDING IS CONSIDERED ACCEPTABLE TO ADJUST 1 CONFIRM THE STITCHES BY SEWING BUTTONHOLES AND REMOVE THE CAP 2 TURN THE ADJUSTING ACREW IN THE DIRECTION OF C IN CASE OF A RIGHT...

Page 21: ...OF JF1018S 2 REMOVE THE FRONT COVER SEE PAGE 5 3 PLACE A PIECE OF PAPER UNDER THE FOOT AND TURN THE BALANCE WHEEL IF THE PAPER IS FED FORWARD TURN THE ADJUSTING SCREW IN THE DIRECTION OF C IF THE PAPE...

Page 22: ...CAM STRAIGHT CAM AND ALSO PUT THE CAM FOLLOWER REPEASING ARM TO THE PATTERN SELECTOR CAM 4 LOOSEN THE SET SCREW 5 MOVE ADJUSTING PLATE INT THE DIRECTON OF ARROW UNTIL TOUCH THE THE RELEASING ARM AND T...

Page 23: ...N THE BALANCE WHEEL TO PUT THE CAM FOLLOWER ONTO THE TOP CONVEX OF THE ZIGZAG CAM ZZ CAM AND SET THE ZZ ADJUSTING ARM TO TOUCH THE ZZ ADJUSTING CAM THEN SET THE CAM FOLLOWER RELEASING ARM TO LIGHTLY T...

Page 24: ...4 LOOSEN THE SET SCREW 5 PUSH THE CONVEX PART OF THE CAM FOLLOWER RELEASING ARM IN THE DIRECTION OF ARROW UNTIL THE CAM FOLLOWER RELEASING ARM TOUCHES TO POSITION A OF THE PATTERN SELECT CAM AND THEN...

Page 25: ...EN THE SET SCREW 5 PUSH THE CONVEX PART OF THE CAM FOLLOWER RELEASING ARM IN THE DIRECTION OF ARROW UNTIL THE CAM FOLLOWER RELEASING ARM TOUCHES TO POSITION A OF THE PATTERN SELECT CAM AND THEN TIGHTE...

Page 26: ...E OBTAINED THEN CHECK AND ADJUST IN THE FOLLOWING PROCEDURE TO ADJUST 1 REMOVE THE FACE PLATE SEE PAGE 4 2 TURN THE ADJUSTING SCREW IN THE DIRECTION OF A IF THE BUTTONHOLE STITCH LENGTH IS LONGER THAN...

Page 27: ...AY CAUSE JUMPING OF THE BELT TEETH ON THE MOTOR PULLEY 2 THE CORRECT MOTOR BELT TENSION IS THAT THE DEFLECTION OF MOTOR BELT IS ABOUT 7 mm 0 28 9 mm 0 36 WHEN PUSHING THE MOTOR BELT BY FINGER AT ABOUT...

Page 28: ...G FOR 220 240V FOR 110 120V BLUE CORD BROWN CORD BLUE CORD FROM MOTOR FROM LAMP SOCKET BROWN CORD LAMP CORD WITH THE RIDGE FROM LAMP SOCKET FROM MOTOR MOTOR CORD WITH THE RIDGE 26 www promelectroavtom...

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