SERVICING MANUAL 419S/423S

Transcription

1 SERVICING MANUAL S/423S

2 TROUBLESHOOTING PROBLEM CAUSE REMEDY REFERENCE 1. SKIPPING 1. NEEDLE IS NOT INSERTED INSERT THE NEEDLE PROPERLY. STITCHES PROPERLY. 2. NEEDLE IS BENT OR WORN. CHANGE THE NEEDLE. 3. INCORRECTLY THREADED RETHREAD. 4. NEEDLE OR THREAD ARE USE THE RECOMMENDED INAPPROPRIATE FOR SEWING NEEDLE AND THREAD. FABRIC BEING SEWN. 5. SEWING ON STRETCH USE A #11 BLUE TIP NEEDLE. FABRIC 6. INAPPROPRIATE NEEDLE SEE MECHANICAL P. 15 BAR HEIGHT ADJUSTMENT NEEDLE BAR HEIGHT. 7. INAPPROPRIATE NEEDLE SEE MECHANICAL P. 16 TO HOOK TIMING ADJUSTMENT NEEDLE TIMING TO SHUTTLE. 8. INAPPROPRIATE NEEDLE SEE MECHANICAL P. 12, 13 TO HOOK CLEARANCE ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK. 2. FABRIC NOT 1. INCORRECT FEED DOG SEE MECHANICAL P. 14 MOVING HEIGHT ADJUSTMENT FEED DOG HEIGHT. 2. THREAD ON BOTTOM SIDE MAKE SURE TO BRING OF FABRIC IS JAMMED UP. BOTH NEEDLE AND BOBBIN THREAD UNDER THE FOOT WHEN STARTING SEWING. 3. FEED DOG TEETH ARE CHANGE THE FEED DOG. WORN. 1

3 PROBLEM CAUSE REMEDY REFERENCE 3. BREAKING 1. INITIAL SEWING SPEED IS START WITH MEDIUM SPEED. UPPER THREAD TOO FAST. 2. THREAD PATH IS USE THE PROPER THREAD INCORRECT. PATH. 3. NEEDLE IS BENT OR DULL. REPLACE WITH A NEW NEEDLE. 4. UPPER THREAD TENSION IS ADJUST UPPER THREAD P. 7 TOO STRONG. TENSION CORRECTLY. 5. NEEDLE SIZE IS USE APPROPRIATE NEEDLE INAPPROPRIATE FOR AND THREAD FOR FABRIC FABRIC. IN USE. 6. NEEDLE EYE IS WORN. CHANGE THE NEEDLE. 7. NEEDLE HOLE IN NEEDLE REPAIR THE HOLE OR PLATE IS WORN OR BURRED. REPLACE THE NEEDLE PLATE. 4. BREAKING 1. INCORRECTLY THREADED THREAD BOBBIN CASE BOBBIN BOBBIN CASE. CORRECTLY. THREAD 2. TOO MUCH THREAD IS ADJUST THE POSITION OF WOUND ON THE BOBBIN. STOPPER. 3. LINT IS STUCK INSIDE THE CLEAN THE HOOK RACE. HOOK RACE. 4. THREAD QUALITY IS CHANGE TO A HIGH QUALITY TOO LOW. SEWING THREAD. 5. THREAD IS JAMMING CLEAR OUT THE JAMMING AROUND THE BOBBIN. THREAD. 6. BOBBIN THREAD TENSION IS ADJUST BOBBIN THREAD P. 8 TOO STRONG. TENSION CORRECTLY. 5. NEEDLE 1. NEEDLE IS HITTING THE SEE MECHANICAL P. 11 BREAKS NEEDLE PLATE. ADJUSTMENT NEEDLE DROP. 2. NEEDLE IS BENT OR WORN. CHANGE THE NEEDLE. 3. NEEDLE IS HITTING THE SEE MECHANICAL P. 12, 13 HOOK RACE. ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK. 4. THE FABRIC MOVES WHILE SEE MECHANICAL P. 10 THE NEEDLE IS PIERCING ADJUSTMENT NEEDLE SWING. IT, OR THE NEEDLE ZIGZAGS WHILE IN FABRIC. 5. FABRIC IS BEING PULLED TOO GUIDE THE FABRIC GENTLY STRONGLY WHILE SEWING. WHILE SEWING. 2

4 PROBLEM CAUSE REMEDY REFERENCE 6. NOISY 1. BACKLASH BETWEEN SEE MECHANICAL P. 13 OPERATION SHUTTLE HOOK GEAR AND ADJUSTMENT CLEARANCE LOWER SHAFT GEAR IS TOO BETWEEN NEEDLE AND HOOK GREAT. (NO. 2). 2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS. LOOSE. 3. INAPPROPRIATE BELT SEE MECHANICAL P. 24 TENSION. ADJUSTMENT MOTOR BELT TENSION. 4. UPPER SHAFT WORM IS LOOSE. ELIMINATE THE LOOSENESS. 5. NOT ENOUGH OIL. OIL ALL MOVING PARTS. 7. DEFORMATION 1. INAPPROPRIATE ZIGZAG SEE MECHANICAL P. 10 OF PATTERN SYNCHRONIZATION. ADJUSTMENT NEEDLE SWING. 2. INAPPROPRIATE SEE MECHANICAL P. 20 DISENGAGEMENT OF CAM ADJUSTMENT FOLLOWER. DISENGAGEMENT OF CAM FOLLOWER. 3. UPPER THREAD TENSION ADJUST UPPER THREAD P. 7 IS TOO STRONG. TENSION CORRECTLY. 4. INAPPROPRIATE FEED SEE MECHANICAL P. 18 BALANCE ADJUSTMENT "FEED BALANCE ON STRETCH STITCH." 3

5 CONTENTS TROUBLESHOOTING SERVICE ACCESS FACE COVER / TOP COVER... 4 BELT COVER... 5 BASE... 5 FRONT COVER... 6 MECHANICAL ADJUSTMENT TOP TENSION... 7 BOBBIN TENSION... 8 PRESSER BAR HEIGHT AND ALIGNMENT... 9 NEEDLE SWING NEEDLE DROP CLEARANCE BETWEEN NEEDLE AND HOOK (NO. 1) CLEARANCE BETWEEN NEEDLE AND HOOK (NO. 2) FEED DOG HEIGHT NEEDLE BAR HEIGHT NEEDLE TIMING TO SHUTTLE BUTTONHOLE FEED BALANCE FEED BALANCE ON STRETCH STITCH BARTACK FEED OF BUTTONHOLE DISENGAGEMENT OF CAM FOLLOWER NEEDLE SWING IN STRAIGHT STITCH SEWING BUTTONHOLE LENGTH MOTOR BELT TENSION WIRING... 24

6 SERVICE ACCESS FACE COVER (A) (B) FACE COVER (TO REMOVE) 1. REMOVE THE FACE COVER BY REMOVING THE CAP (A) AND SCREW (B). (TO ATTACH) 2. ATTACH THE FACE COVER WITH THE SCREW, AND THEN, REPLACE THE CAP. TOP COVER (D) TOP COVER (C) (TO REMOVE) 1. REMOVE THE FACE COVER. 2. LOOSEN THE SETSCREW (C) AND REME SETSCREWS (D). 3. REMOVE THE TOP COVER. (TO ATTACH) 4. FOLLOW THE ABOVE PROCEDURE IN REVERSE. 4

7 SERVICE ACCESS BELT COVER BELT COVER (A) BASE 1. REMOVE THE FACE COVER AND TOP COVER (SEE PAGE 4). 2. LOOSEN SCREW (A). 3. TAKE THE BELT COVER OUT. (TO ATTACH) 4. FOLLOW THE ABOVE PROCEDURE IN REVERSE. (B) (B) (B) BASE (TO REMOVE) 1. REMOVE THE FACE COVER, TOP COVER (SEE PAGE 4) AND BELT COVER. 2. REMOVE 6 SCREWS (B). 3. REMOVE THE BASE. (TO ATTACH) 4. FOLLOW THE ABOVE PROCEDURE IN REVERSE. 5

8 SERVICE ACCESS FRONT COVER (D) (C) (A) PATTERN SELECTOR DIAL FRONT COVER (B) (TO REMOVE) 1. REMOVE THE FACE COVER, TOP COVER, BELT COVER AND BASE (SEE PAGES 4-5). 2. REMOVE THE PATTERN SELECTOR DIAL. 3. LOOSEN SETSCREWS (A) AND (B), AND THEN, REMOVE THE FRONT COVER BY REMOVING SETSCREWS (C) AND (D). (TO ATTACH) 4. FOLLOW THE ABOVE PROCEDURE IN REVERSE. 6

9 MECHANICAL ADJUSTMENT TOP TENSION TO CHECK: THE STANDARD UPPER THREAD TENSION SHOULD BE g WHEN PULLING THE THREAD (COTTON THREAD #50) IN THE DIRECTION OF (A) WITH THE TENSION DIAL AT 3. (MAKE SURE THE FOOT IS LOWERED.) IF THE TENSION IS OUT OF THE STANDARD RANGE, ADJUST IT AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. REMOVE THE TOP COVER (SEE PAGE 4). 2. TURN THE ADJUSTING NUT (B) IN THE DIRECTION OF (C) WHEN THE UPPER THREAD TENSION IS TOO TIGHT. TURN THE ADJUSTING NUT (B) IN THE DIRECTION OF (D) WHEN THE UPPER THREAD TENSION IS TOO LOOSE. 3. ATTACH THE TOP COVER. (A) (B) (D) (C) 7

10 MECHANICAL ADJUSTMENT BOBBIN TENSION TO CHECK: SET THE BOBBIN IN THE BOBBIN CASE AND PASS THE THREAD (COTTON #50) THROUGH THE TENSION SPRING. THE BOBBIN THREAD TENSION SHOULD BE 45 55g WHEN PULLING THE THREAD IN THE DIRECTION OF (A). IF THE TENSION IS OUT OF THIS RANGE, ADJUST IT AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. IF THE BOBBIN THREAD TENSION IS TOO TIGHT, TURN THE ADJUSTING SCREW (B) IN THE DIRECTION OF (C). 2. IF THE BOBBIN THREAD TENSION IS TOO LOOSE, TURN THE ADJUSTING SCREW (B) IN THE DIRECTION OF (D) (A) COTTON THREAD #50 (D) (C) (B) 8

11 MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALIGNMENT TO CHECK: 1. RAISE THE PRESSER FOOT LEVER (A). 2. THE DISTANCE BETWEEN THE PRESSER FOOT (C) AND THE NEEDLE PLATE (D) SHOULD BE 6.0 MM (0.24"). ADJUSTMENT PROCEDURE: 1. REMOVE THE FACE COVER (SEE PAGE 4). 2. RAISE THE PRESSER FOOT LEVER AND LOOSEN THE SCREW (B) ON THE PRESSER BAR HOLDER. ADJUST THE DISTANCE BETWEEN THE ZIGZAG FOOT (C) AND THE NEEDLE PLATE (D) TO 6.0 MM (0.24"). 3. TIGHTEN THE SCREW (B) SECURELY. 4. ATTACH THE FACE COVER. NOTE: WHEN YOU TIGHTEN THE SCREW (B), MAKE SURE THAT BOTH SIDES OF THE PRESSER FOOT ARE PARALLEL TO THE FEED DOG SLOTS (E) ON THE NEEDLE PLATE. (A) (E) (B) ZIGZAG FOOT (C) (D) 6.0MM 9

12 MECHANICAL ADJUSTMENT NEEDLE SWING TO CHECK: WHEN SEWING THE ZIGZAG PATTERN (WITH MAXIMUM ZIGZAG WIDTH), IF THE NEEDLE BAR STARTS MOVING SIDEWAYS WHILE THE NEEDLE IS IN THE FABRIC, ADJUST THE NEEDLE SWING ACCORDING TO THE FOLLOWING PROCEDURE. ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL WITH MAXIMUM ZIGZAG WIDTH, AND REMOVE THE TOP COVER (SEE PAGE 4). 2. LOOSEN THE TWO SETSCREWS. 3. ADJUST THE NEEDLE SWING BY TURNING THE HANDWHEEL, WHILE HOLDING THE WORM SO AS NOT TO ROTATE IT, UNTIL THE NEEDLE SWING STARTS AT 2 3 MM ABOVE THE NEEDLE PLATE AFTER THE NEEDLE HAS COME OUT OF THE RIGHT SIDE OF THE NEEDLE PLATE HOLE. 4. TIGHTEN TWO SETSCREWS. 5. ATTACH THE TOP COVER. NOTE: AFTER ADJUSTING THE NEEDLE SWING, CHECK THAT THE UPPER SHAFT WORM AND GEAR ROTATE SMOOTHLY WITHOUT ANY BACKLASH BETWEEN THEM. UPPER SHAFT WORM GEAR SETSCREW (2 PCS.) 2 3MM 10

13 MECHANICAL ADJUSTMENT NEEDLE DROP TO CHECK: WHEN THE NEEDLE SWINGS IN MAXIMUM ZIGZAG WIDTH, THE DISTANCE BETWEEN BOTH ENDS OF THE NEEDLE HOLE ON THE NEEDLE PLATE AND THE NEEDLE DROP POSITIONS SHOULD BE EQUAL. IF NOT, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. REMOVE THE FACE COVER (SEE PAGE 4). 2. SET THE PATTERN SELECTOR DIAL AT MAXIMUM ZIGZAG WIDTH. 3. LOOSEN THE SETSCREW. 4. TURN THE ECCENTRIC PIN TO ADJUST THE NEEDLE DROP. 5. TIGHTEN THE SETSCREW. 6. ATTACH THE FACE COVER. NOTE: CHECK THE HOOK TIMING AFTER THIS ADJUSTMENT. SETSCREW ECCENTRIC PIN BH LEVER BOTH CLEARANCE SHOULD BE EQUAL 11

14 MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD NO. 1) TO CHECK: THE CLEARANCE BETWEEN THE NEEDLE AND SHUTTLE RACE SHOULD BE 0.05 TO MM. IF NOT, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. REMOVE THE TOP COVER (SEE PAGE 4). 2. SET THE PATTERN SELECTOR DIAL AT ( ), STITCH WIDTH CONTROL AT ( 0 ). 3. LOOSEN SETSCREW (A), AND MOVE THE NEEDLE BAR SUPPORTER IN THE DIRECTION OF THE ARROWS TO GET A CLEARANCE BETWEEN 0.05 TO MM. * IF CLEARANCE IS TOO WIDE, MOVE THE NEEDLE BAR SUPPORTER TO DIRECTION (B). * IF CLEARANCE IS TOO NARROW, MOVE THE NEEDLE BAR SUPPORTER TO DIRECTION (C). NOTE: AFTER THIS ADJUSTMENT, CHECK IF THE CLEARANCE BETWEEN THE NEEDLE AND NEEDLE PLATE IS MORE THAN 0.15 MM AS SHOWN IN FIGURE (D). IF NOT, ADJUST THE CLEARANCE BETWEEN NEEDLE AND SHUTTLE RACE BY ADJUSTMENT METHOD (2), AFTER RE-ADJUSTMENT CHECK THE CLEARANCE BETWEEN NEEDLE AND NEEDLE PLATE AGAIN. 4. ATTACH THE TOP COVER. SETSCREW (A) DIRECTION (C) DIRECTION (B) NEEDLE BAR SUPPOTER 0.05 TO +0.10MM FIGURE (D) CLEARANCE BETWEEN NEEDLE AND NEEDLE PLATE IS MORE THAN 0.15MM. 12

15 MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD NO.2) TO CHECK: USE THIS ADJUSTMENT METHOD NO. 2 WHEN METHOD NO.1 CANNOT BE USED. THE CLEARANCE BETWEEN THE NEEDLE AND SHUTTLE RACE SHOULD BE 0.05 TO MM. ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL AT ( ), STITCH WIDTH CONTROL AT ( 0 ). 2. REMOVE THE BASE (SEE PAGE 5) AND SHUTTLE RACE RING. 3. LOOSEN THE SCREW (A) ON THE LOWER SHAFT BUSHING AND SHIFT THE GEAR ABOUT 0.5 MM TO THE RIGHT TO DISENGAGE GEARS. THEN, TIGHTEN THE SCREW TEMPORARILY. 4. LOWER THE NEEDLE AND LOOSEN THE TWO SHUTTLE RACE SETSCREWS (B). PULL UP OR PUSH DOWN THE SHUTTLE RACE TO ADJUST THE CLEARANCE BETWEEN THE NEEDLE AND THE SHUTTLE RACE IN THE RANGE OF 0.05 TO MM. 5. SET THE PATTERN SELECTOR DIAL AT( ), STITCH WIDTH CONTROL AT ( 5 ). TURN THE HANDWHEEL TO CHECK IF THE CLEARANCE BETWEEN THE NEEDLE AND INNER EDGES OF THE SHUTTLE RACE SPRING AT THE LEFT AND RIGHT NEEDLE DROPS ARE EQUAL. IF NOT, ADJUST BY TURNING THE SHUTTLE RACE UNIT. 6. TIGHTEN THE TWO SHUTTLE RACE SETSCREWS (B). 7. LOOSEN THE SET SCREW ON THE LOWER SHAFT BUSHING AND SHIFT THE GEAR BACK TO THE ORIGINAL POSITION WHILE ADJUSTING THE BACKLASH. 8. TIGHTEN SCREW (A) FIRMLY. 9. ATTACH THE SHUTTLE RACE RING AND BASE. NOTE: THE ROTARY PLAY OF SHUTTLE DRIVER SHOULD BE LESS THAN 0.3 MM AND THE LOWER SHAFT SHOULD TURN SMOOTHLY. AFTER THE ADJUSTMENT, CHECK THE HOOK TIMING TO MM CLEARANCE SHOULD BE EQUAL SHUTTLE RACE SETSCREW B (2 PCS.) SETSCREW (A) LOWER SHAFT BUSHING (FRONT) NEEDLE SHUTTLE RACE SPRING 13

16 MECHANICAL ADJUSTMENT FEED DOG HEIGHT TO CHECK: 1. LOWER THE PRESSER FOOT. 2. TURN THE HANDWHEEL TOWARD YOU TO BRING THE FEED DOG TO ITS HEIGHEST POSITION. THE HEIGHT OF THE FEED DOG FROM THE NEEDLE PLATE SHOULD BE 0.75 TO 0.90 MM. IF IT IS NOT IN THE RANGE, ADJUST AS FOLLOWS. ADJUSTMENT PROCEDURE: 1. REMOVE THE BASE (SEE PAGE 5). 2. LOWER THE PRESSER FOOT AND TURN THE HANDWHEEL TOWARD YOU UNTIL THE FEED DOG COMES TO ITS HIGHEST POINT. 3. LOOSEN THE SCREW (A). 4. TURN THE FEED LIFTING PIN TO ADJUST THE HEIGHT OF FEED DOG ( MM). 5. TIGHTEN THE SCREW (A). 6. TURN THE HANDWHEEL TOWARD YOU TO RECHECK THE HEIGHT OF FEED DOG. 7. ATTACH THE BASE. NEEDLE PLATE 0.75 TO 0.90MM (A) FEED LIFTING PIN 14

17 MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT TO CHECK: WHEN THE TIP OF SHUTTLE HOOK MEETS THE LEFT SIDE OF THE NEEDLE IN ASCENDING TRAVEL OF THE NEEDLE FROM ITS LEFT AND LOWEST POSITION, THE DISTANCE BETWEEN THE TOP OF THE NEEDLE EYE AND THE TIP OF THE SHUTTLE HOOK SHOULD BE IN THE RANGE OF MM. ADJUSTMENT PROCEDURE: 1. REMOVE THE FACE COVER (SEE PAGE 4). 2. SET THE PATTERN SELECTOR DIAL AT ( ), STITCH WIDTH CONTROL AT ( 0 ). 3. OPEN THE BED COVER PLATE. 4. REMOVE THE SHUTTLE RACE RING. 5. TURN THE HANDWHEEL TOWARD YOU UNTIL THE TIP OF THE SHUTTLE HOOK MEETS THE LEFT SIDE OF THE NEEDLE. 6. LOOSEN THE NEEDLE BAR CONNECTING STUD SCREW (A). 7. ADJUST THE HEIGHT OF THE NEEDLE BAR BY MOVING THE NEEDLE BAR UPWARD OR DOWNWARD WITHOUT TURNING IT. 8. TIGHTEN THE SCREW (A). 9. ATTACH THE SHUTTLE RACE RING. 10. ATTACH THE FACE COVER. TIP OF SHUTTLE HOOK MEETS LEFT SIDE OF NEEDLE SETSCREW (A) 2.9 TO 3.5MM NEEDLE BAR 15

18 MECHANICAL ADJUSTMENT NEEDLE TIMING TO SHUTTLE TO CHECK: THE HEIGHT OF THE NEEDLE POINT FROM ITS LOWEST POINT SHOULD BE IN THE RANGE OF MM WHEN THE TIP OF THE SHUTTLE HOOK MEETS THE LEFT SIDE OF THE NEEDLE AT THE LEFT NEEDLE POSITION IN ASCENDING TRAVEL. ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL AT ( ), STITCH WIDTH CONTROL AT "0". 2. REMOVE THE BASE (SEE PAGE 5). 3. OPEN THE BED COVER PLATE. 4. REMOVE THE SHUTTLE RACE RING. 5. TURN THE HANDWHEEL TOWARD YOU UNTIL THE TIP OF THE SHUTTLE HOOK MEETS THE LEFT SIDE OF THE NEEDLE. 6. LOOSEN THE LOWER SHAFT CRANK ARM SCREWS (A). 7. WHILE HOLDING THE SHUTTLE HOOK SO IT DOESN'T TURN, TURN THE HANDWHEEL TOWARD YOU UNTIL THE NEEDLE COMES TO ITS LOWEST POSITION. THEN, FURTHER TURN THE HANDWHEEL TO RAISE THE NEEDLE ABOUT 1.7 MM FROM ITS LOWEST POSITION. 8. TIGHTEN THE SCREWS (A). 9. TURN THE HANDWHEEL TOWARD YOU TO CHECK IF THE HEIGHT IS IN THE RANGE OF MM. IF IT IS NOT IN THIS RANGE, REPEAT THE ABOVE PROCEDURE. 10. ATTACH THE SHUTTLE RACE RING. 11. ATTACH THE BASE. LOWER SHAFT CRANK ARM LOWER SHAFT 1.45 TO 1.95MM LOWEST POSITION SETSCREW (A) (2 PCS.) 16

19 MECHANICAL ADJUSTMENT BUTTONHOLE FEED BALANCE TO CHECK: WHEN SEWING A BUTTONHOLE, THE STITCHES ON EACH SIDE OF THE BUTTONHOLE SHOULD BE OF THE SAME STITCH DENSITY. A RANGE OF 9 12 STITCHES IN THE BACKWARD FEEDING (RIGHT SIDE ROW) AGAINST 10 STITCHES IN THE FORWARD FEEDING (LEFT SIDE ROW) IS CONSIDERED ACCEPTABLE. ADJUSTMENT PROCEDURE: 1. CHECK FEED BALANCE BY SEWING BUTTONHOLES. 2. REMOVE THE TOP COVER (SEE PAGE 4). 3. TURN THE ADJUSTING SCREW IN THE DIRECTION OF (C) IN THE CASE OF (A) (RIGHT STITCHES ARE SPARSE), OR IN THE DIRECTION OF (D) IN CASE OF (B) (LEFT STITCHES ARE SPARSE). 4. ATTACH THE TOP COVER. (D) (C) (A) (B) ADJUSTING SCREW FORWARD FEEDING BACKWARD FEEDING 17

20 MECHANICAL ADJUSTMENT FEED BALANCE ON STRETCH STITCH TO CHECK: IF THE STRETCH STITCH PATTERNS ARE DISTORTED WHEN SETTING THE STITCH LENGTH CONTROL AT "S.S." (THERE IS A DIFFERENCE BETWEEN FORWARD FEEDING AND BACKWARD FEEDING, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. REMOVE THE TOP COVER (SEE PAGE 4). 2. SET THE PATTERN SELECTOR DIAL AT ( ), AND THE STITCH LENGTH CONTROL AT "S.S." 3. TURN THE STRETCH STITCH ADJUSTING SCREW IN THE DIRECTION OF (C) WHEN A > B, OR IN THE DIRECTION OF (D) WHEN A < B. 4. ATTACH THE TOP COVER. (C) (D) A A B A A B A A B STRECH STITCH ADJUSTING SCREW A B A B A B 18

21 MECHANICAL ADJUSTMENT BARTACK FEED OF BUTTONHOLE TO CHECK: IF THE MATERIAL IS FED FORWARD OR BACKWARD WHEN SEWING THE BARTACK ON A BUTTONHOLE, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL AT ( ), AND THE STITCH LENGTH CONTROL AT ( 4 ). 2. REMOVE THE TOP COVER (SEE PAGE 4). 3. PLACE A PIECE OF PAPER UNDER THE FOOT AND TURN THE HANDWHEEL. IF THE PAPER IS FED FORWARD, TURN THE ADJUSTING SCREW IN THE DIRECTION OF (C). IF THE PAPER IS FED BACKWARD, TURN THE ADJUSTING SCREW IN THE DIRECTION OF (D). 4. ATTACH THE TOP COVER. (FOR MODEL 415) (D) (C) ADJUSTING SCREW FORWARD FEEDING BACKWARD FEEDING (FOR MODEL 419S/423S) (D) (C) ADJUSTING SCREW FORWARD FEEDING BACKWARD FEEDING 19

22 MECHANICAL ADJUSTMENT DISENGAGEMENT OF CAM FOLLOWER TO CHECK: IF THE CLEARANCE BETWEEN THE CAM FOLLOWER AND THE TOP CONVEX OF THE ZIGZAG CAM IS NOT ENOUGH, THE PATTERN SELECTOR DIAL IS BLOCKED OR WILL NOT SELECT THE CORRECT PATTERN. ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL AT ( ) AND THE STITCH WIDTH CONTROL AT ( 5 ). (THE STITCH LENGTH CONTROL AT ANY POSITION.) 2. REMOVE THE FRONT COVER (SEE PAGE 6). 3. PUT THE CAM FOLLOWER TO THE ZIGZAG CAM (STRAIGHT CAM), AND PUT THE CAM FOLLOWER RELEASING ARM TO THE PATTERN SELECT CAM. 4. LOOSEN THE SCREW. 5. PUSH THE ADJUSTING PLATE IN THE DIRECTION OF ARROW UNTIL IT TOUCHES THE RELEASING ARM AND TIGHTEN SET SCREW. NOTE: AFTER THIS ADJUSTMENT, CHECK THAT THE CLEARANCE BETWEEN THE ZIGZAG CAM AND THE CAM FOLLOWER IS ABOUT 0.3MM WHEN SETTING THE CAM FOLLOWER RELEASING ARM ONTO POSITION (A) OF PATTERN SELECT CAM. 6. MOUNT THE FRONT COVER. NOTE: CHECK THE NEEDLE MOVEMENT FOR STRAIGHT STITCH. CAM FOLLOWER CAM FOLLOWER RELEASING ARM ZIGZAG CAM PATTERN SELECT CAM SCREW POSITION (A) ADJUSTING PLATE 20

23 MECHANICAL ADJUSTMENT NEEDLE IN STRAIGHT STICH SEWING TO CHECK: IF THE NEEDLE SWINGS WHEN RUNNING THE MACHINE WITH ZIGZAG STITCH ( ) AT WIDTH "0", CORRECT IT AS FOLLOWS: AT THE STRAIGHT STITCH SEWING, ADJUST IT AS FOLLOWS: 1. SET THE PATTERN SELECTOR DIAL AT ( ) AND STITCH WIDTH CONTROL AT (0). 2. REMOVE THE FRONT COVER UNIT (SEE PAGE 6). 3. LOOSEN THE SETSCREW. 4. TURN THE HANDWHEEL TOWARD YOU TO RAISE THE CAM FOLLOWER ON THE CONVEX OF THE ZIGZAG CAM AND BUTT THE RELEASING ARM AGAINST THE ZIGZAG WIDTH ADJUSTING CAM. 5. IN THIS CONDITION, ADJUST THE ZIGZAG WIDTH LINK SO THAT THERE IS NO PLAY IN BOTH CAM FOLLOWER AND RELEASING ARM, AND THEN TIGHTEN THE SETSCREW. * AFTER THE ADJUSTMENT, CHECK THE FOLLOWINGS: MAKE SURE THE NEEDLE DOES NOT SWING AT STRAIGHT STITCH SEWING. WHEN THE NEEDLE SWINGS IN MAXIMUM ZIGZAG WIDTH, THE DISTANCE BETWEEN BOTH ENDS OF THE NEEDLE HOLE ON THENEEDLE PLATE AND THE NEEDLE DROP POSITION SHOUKD BE EQUAL AND NOT LESS THAN 0.2MM. 6. ATTACH THE FRONT COVER. ZIGZAG WIDTH ADJUSTING LINK SETSCREW ZIGZAG WIDTH ADJUSTING ARM CAM FOLLOWER RELEASING ARM ZIGZAG WIDTH ADJUSTING CAM ZIGZAG CAM ZIGZAG WIDTH ADJUSTING CAM RELEASING ARM BOTH CLEARANCE SHOULD BE EQUAL 21

24 MECHANICAL ADJUSTMENT (FOR MODEL 419S/423S) BUTTONHOLE LENGTH TO CHECK: BUTTONHOLE SHOULD BE ABOUT 3 MM LONGER THAN THE LENGTH SET BY R FOOT. IF THE BUTTONHOLE LENGTH IS OUT OF STANDARD RANGE, CHECK AND ADJUST AS FOLLOWS. ADJUSTMENT PROCEDURE: 1. REMOVE THE FACE COVER (SEE PAGE 4). 2. TURN THE ADJUSTING SCREW IN THE DIRECTION OF (A) IF THE BUTTONHOLE STITCH LENGTH IS LONGER THAN THE STANDARD, OR IN THE DIRECTION OF (B) IF THE BUTTONHOLE STITCH LENTH IS SHORTER THAN THE STANDARD. 3 ATTACH THE FACE COVER. STANDARD ABOUT 3MM ADJUSTING SCREW (A) (B) BUTTONHOLE LEVER 22

25 MECHANICAL ADJUSTMENT MOTOR BELT TENSION TO CHECK: 1. IMPROPER BELT TENSION MAY CAUSE NOISE, OVERLOAD OF MOTOR, SLOW RUNNING OR MOTOR BELT JUMPING. 2. THE BELT DEFLECTION SHOULD BE 7MM 9MM WHEN PRESSING THE MIDDLE OF THE MOTOR BELT WITH APPROXIMATELY 300 GRAMS OF PRESSURE. ADJUSTMENT PROCEDURE: 1. REMOVE THE BELT COVER (SEE PAGE 5). 2. LOOSEN THE SCREWS (A) AND (B). 3. MOVE THE MOTOR UP OR DOWN TO ADJUST THE DEFLECTION ABOUT 7MM 9MM. 4. TIGHTEN THE SCREWS (A) AND (B). 5. ATTACH THE BELT COVER. 300 GRAMS LOAD (A) DEFLECTION 7 9MM (B) 23

26 WIRING (FOR V) FROM MOTOR FROM LAMP SOCKET (FOR V) FROM LAMP SOCKET FROM MOTOR 24

27 PARTS LIST MODEL (423S, 419S)

28 PARTS LIST

29 PARTS LIST KEY PART NO. NO. DESCRIPTION TOP COVER UNIT TOP COVER THREAD GUIDE PLATE UNIT ADJUSTABLE NUT BOBBIN WINDER STOPPER SETSCREW 4X PLAIN WASHER NUT CARRYING HANDLE HANDLE FIXING PLATE PIN HANDLE FIXING PLATE TAPPING SCREW 3X12B SPOOL PIN SPOOL PIN SPOOL PIN SPRING SETSCREW 3X CUSHION SETSCREW 4X SETSCREW 4X TP SCREW 4X BOBBIN WINDER UNIT BOBBIN WINDER ARM UNIT BOBBIN WINDER PLATE SNAP RING E CRUCH ARM SNAP RING E BOBBIN WINDER SPRING (1) BOBBIN WINDER SPRING (2) SETSCREW 4X FACE PLATE UNIT (U.K. & CANADA) FACE PLATE UNIT (U.S.A., AUSTRALIA & CONTINENTAL EUROPE) FACE PLATE THREAD CUTTER UNIT STICKER SETSCREW 4X CAP EXTENSION TABLE UNIT BASE COVER UNIT (AUSTRALIA, U.K. & CONTINENTAL EUROPE) BASE COVER UNIT (U.S.A.) BASE COVER UNIT (CANADA) BASE DROP LEVER SNAP RING CS BED LID LID SPRING SETSCREW 4X LEVEL ADJUSTING SCREW NUT BED RUBBER BASE CAUTION STICKER (U.S.A.) CAUTION STICKER (CANADA) LAMP STICKER (U.S.A. & AUSTRALIA) BED LID UNIT (U.S.A.) BED LID UNIT (CANADA) 2

30 PARTS LIST (120V)

31 KEY PARTS NO. NO. DESCRIPTION PARTS LIST FRONT BRACKET UNIT (AUSTRALIA, U.K. & CONTINENTAL EUROPE) FRONT BRACKET UNIT (U.S.A. & CANADA) FRONT BRACKET (AUSTRALIA, U.K. & CONTINENTAL EUROPE)) FRONT BRACKET (U.S.A. & CANADA) TENSION RELEASE LEVER SNAP RING CS SETSCREW 4X FACE PLATE BASE PLATE NEEDLE BAR SUPPORTER SPRING LAMP SOCKET UNIT (AUSTRALIA, U.K. & CONTINENTAL EUROPE)) LAMP SOCKET UNIT (U.S.A.) LAMP SOCKET UNIT (CANADA) LAMP BULB 240V (AUSTRALIA, U.K. & CONTINENTAL EUROPE)) LAMP BULB 120V (U.S.A. & CANADA) NYLON BELT PRESSER BAR PRESSER BAR SPRING PRESSER BAR BRACKET HEXAGONAL SOCKET SCREW 4X PRESSER REGULATOR SPRING PRESSER BAR BUSHING SETSCREW 4X PRESSER FOOT LIFTER PRESSER FOOT LIFTER PIN WASHER SETSCREW 4X FOOT HOLDER UNIT THUMB SCREW TENSION REGULATOR UNIT TOP COVER THREAD GUIDE SETSCREW 3X SETSCREW 4X SETSCREW 4X TENSION RELEASE ARM UNIT TENSION RELEASE ARM BASE TENSION RELEASE ARM TENSION RELEASE SPRING SNAP RING E ARM THREAD GUIDE FRONT BRACKET UNIT (AUSTRALIA, U.K. & CONTINENTAL EUROPE)) FRONT BRACKET UNIT (U.S.A. & CANADA) PRESSER ADJUSTING PLATE SNAP RING E BH LEVER BASE UNIT BH LEVER BASE BH ADJUSTING LEVER SNAP RING E SETSCREW 3X PRESSER DIAL UNIT PRESSER DIAL SNAP RING CS SETSCREW 4X BH LEVER UNIT BH LEVER UNIT BH LEVERSUPPORTER FRICTION SPRING SPRING PIN SCREW 4X ADJUSTING LOCK NUT BH LEVER BASE BH LEVER SPRING BH STEP UP ROD NYLON CRIP 4

32 PARTS LIST

33 PARTS LIST KEY PARTS NO. NO. DESCRIPTION NEEDLE BAR SUPPORTER UNIT NEEDLE BAR SUPPORTER NEEDLE BAR SUPPORTER PIN SPRING WASHER PLAIN WASHER SNAP RING E HEXAGONAL SOCKET SCREW 3X NEEDLE THREADER SHAFT UNIT NEEDLE THREADER SHAFT SPRING PIN NEEDLE THREADER PLATE WASHER GROOVED PIN NEEDLE THREADER SPRING NEEDLE THREADER GUIDE PLATE NEEDLE THREADER LEVER SUPP NEEDLE THREADER LEVER SETSCREW 3X NEEDLE THREADER REGULATOR UNIT NEEDLE THREADER REGULATOR NEEDLE THREADER BASE PLATE SETSCREW 2X HEXAGONAL SOCKET SCREW 3X NEEDLE BAR UNIT NEEDLE BAR CONNECTING STUD UNIT HEXAGONAL SOCKET SCREW 5X NEEDLE HA STOPPER WASHER BOLT ZIGZAG ROD WASHER ZIGZAG ROD ECCENTRIC PIN THREAD TAKE-UP LEVER UNIT THREAD TAKE-UP LEVER PIN SNAP RING E NEEDLE BAR CRANK PIN UNIT 6

34 PARTS LIST

35 PARTS LIST KEY PARTS NO. NO. DESCRIPTION UPPER SHAFT (UNIT) SCREW SCREW HEXAGONAL SOCKET SCREW 5X HEXAGONAL SOCKET SCREW HEXAGON SOCKET SCREW 4X FELT FELT UPPER SHAFT REAR BUSHING CRANK ROD UNIT CRANK ROD PIN SPRING PIN 3X CLUTCH RING CLUTCH SPRING BELT WHEEL SNAP RING E SPRING PIN 4X HANDWHEEL UNIT HANDWHEEL BALANCE WEIGHT TAPPING SCREW 3X10B TIMING BELT 8

36 PARTS LIST

37 PARTS LIST KEY PARTS NO. NO. DESCRIPTION ZIGZAG MECHANISM UNIT ZIGZAG MECHANISM UNIT (MODEL 419S) INDEX SPRING INDEX SPRING SETSCREW 3X SETSCREW 4X TP SCREW 4X SETSCREW 4X SETSCREW PATTERN SELECTOR DIAL FEED REGULATOR UNIT FEED REGULATOR ROD SETSCREW ADJUSTABLE NUT SNAP RING E REVERSE LEVER ROD FEED REGULATOR SPRING FEED REGULATOR BODY SPRING SETSCREW 5X SPRING SUSTAINER REVERSE LEVER UNIT REVERSE LEVER REVERSE LEVER SUPPORTER REVERSE LEVER SPRING SPRING WASHER SNAP RING CS FRONT COVER UNIT FRONT COVER UNIT (MODEL 419S) FRONT COVER FRONT COVER (MODEL 419S) WIDTH SLIDE BUTTON FEED SLIDE BUTTON SLIDE BUTTON PLATE TAPPING SCREW 3X TAPPING SCREW 3X FRONT PANEL FRAME FRONT PANEL FRAME (MODEL 419S) FRONT COVER SET PLATE 10

38 PARTS LIST

39 PARTS LIST KEY PARTS NO. NO. DESCRIPTION HOOK RACE UNIT HOOK RACE UNIT HOOK HEXAGONAL SOCKET SCREW 5X BOBBIN CASE UNIT BOBBIN HOOK DRIVER SHAFT BUSHING CAP CRANK ROD PIN HEXAGONAL SOCKET SCREW 5X5 WP LOWER SHAFT CRANK LOWER SHAFT LOWER SHAFT FRONT BUSHING LOWER SHAFT REAR BUSHING FELT FEED LIFTING CAM LOWER SHAFT GEAR NEEDLE PLATE FLAT SCREW GEAR BOX UPPER COVER SCREW 4X WASHER 12

40 PARTS LIST

41 PARTS LIST KEY PART NO. NO. DESCRIPTION FEED ROCK SHAFT UNIT FEED ROCK SHAFT FEED DOG BASE FEED DOG BASE SHAFT FEED DOG BASE SLIDING PLATE SETSCREW SNAP RING E HEXAGON SOCKET SCREW 4X FEED DOG SETSCREW FEED DOG BASE SPRING FEED ROCK SHAFT CRANK UNIT FEED ROCK SHAFT CRANK SETSCREW SETSCREW STRAIGHT PIN FEED LIFTING ARM SHAFT HOLDER HEXAGONAL SOCKET SCREW 5X FORK ROD UNIT FEED REGULATOR SLIDE BLOCK FEED ROCK SHAFT CONNECTING PIN SNAP RING E FEED LIFTING ARM UNIT FEED LIFTING ARM FEED LIFTING ARM SPRING DROP FEED SELECTING PLATE DROP FEED SELECTING SPRING SLIDING PLATE FLAT SCREW FEED LIFTING CRANK ROLLER SHAFT SCREW 4X SCREW 4X6 14

42 PARTS LIST

43 PARTS LIST KEY PARTS NO. NO. DESCRIPTION MACHINE SOCKET UNIT (AUSTRALIA, U.K. & CONTINENTAL EUROPE) MACHINE SOCKET UNIT (U.S.A. & CANADA) NUT MACHINE SOCKET COVER TAPPING SCREW 3X10B SETSCREW 4X MOTOR UNIT (AUSTRALIA & U.K.) MOTOR UNIT (U.S.A. & CANADA) MOTOR UNIT (CONTINENTAL EUROPE) TP SCREW 5X BELT COVER SETSCREW 4X CAP 16

44 PARTS LIST

45 PARTS LIST KEY PARTS NO. NO. DESCRIPTION ACCESSORY SET SCREW DRIVER OIL BOBBIN SEAM RIPPER/BUTTONHOLE OPENER NEEDLE SET AUTOMATIC BUTTONHOLE FOOT HEMMER FOOT ZIPPER FOOT HEM GUIDE FOOT CONTROL (AUSTRALIA) FOOT CONTROL (U.S.A. & CANADA) FOOT CONTROL (U.K.) FOOT CONTROL (NETHERLANDS) INSTRUCTION BOOK (ENGLISH) INSTRUCTION BOOK (DUTCH, FRENCH & GERMAN) INSTRUCTION BOOK (NORWEGIAN, SWEDISH & DANISH) INSTRUCTION BOOK (ITALIAN, FINNISH & SPANISH) COVER 18