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MECHANICAL ADJUSTMENT

MOTOR BELT TENSION

TO CHECK:

1. If the motor belt tension is too tight or too loose, it can cause a belt noise: If the tension is too tight, it can cause
  the machine to run slowly and the motor to overload; if the tension is too loose; it can cause the belt to jump.
2. The correct motor belt tension is when the deflection of motor belt is about 7 to 9 mm.
  (when pushing the motor belt by finger with a 300 grams-force load.)

ADJUSTMENT PROCEDURE:

1. Remove the rear cover (see page 6).
2. Loosen the setscrews.
3. Move the motor up or down to adjust the deflection about 7 to 9 mm.
4. Tighten the setscrews.

300 gf load

Deflection 7 to 9 mm

Setscrew

Setscrew

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Содержание 43

Страница 1: ...SERVICE MANUAL PARTS LIST MODEL Magenta 43 First Edition 08 July 2020...

Страница 2: ...NEEDLE DROP 11 CLEARANCE BETWEEN NEEDLE AND SHUTTLE RACE ADJUSTMENT METHOD NO 1 12 CLEARANCE BETWEEN NEEDLE AND SHUTTLE RACE ADJUSTMENT METHOD NO 2 13 FEED DOG HEIGHT 14 NEEDLE BAR HEIGHT 15 NEEDLE TI...

Страница 3: ...bar See mechanical adjustment P 15 height Needle bar height 7 Inappropriate needle to hook See mechanical adjustment P 16 timing Needle timing to shuttle 8 Inappropriate needle to See mechanical adjus...

Страница 4: ...Too much thread is around on Adjust the position of stopper the bobbin 3 Lint is stuck inside the hook Clean the hook race race 4 Thread quality is too low Change to a high quality sewing thread 5 Th...

Страница 5: ...ent P 21 Motor belt tension 4 Upper shaft gear is loose Eliminate the looseness 5 Not enough oil Oil all moving parts 7 Deformation of 1 Inappropriate zigzag See mechanical adjustment P 10 pattern syn...

Страница 6: ...4 A TO REMOVE 1 Remove the face cover by removing the setscrew A TO ATTACH 2 Follow the above procedure in reverse SERVICE ACCESS 1 FACE COVER...

Страница 7: ...1 Remove the face cover see page 4 2 Remove the dials 3 Loosen the setscrew A B and C and then remove the front cover by removing the setscrews D E F G H I and J Note Unhook the tab K from the rear co...

Страница 8: ...ver and front cover see pages 4 to 5 2 Loosen the setscrews A B and C and remove setscrews D E and F 3 Pull up the spool pins Remove the machine socket Remove the rear cover clearing the presser foot...

Страница 9: ...sion dial at 3 make sure the foot should be lowered If the tension is out of the standard range adjust it as follows ADJUSTMENT PROCEDURE 1 Remove the front cover see page 5 2 Turn the adjusting screw...

Страница 10: ...bobbin thread tension should be 32 to 38 grams force when pulling the thread in the direction of B If the tension is out of the range adjust it as follows ADJUSTMENT PROCEDURE 1 Turn the adjusting sc...

Страница 11: ...the face plate set plate 2 Raise the presser foot lever and loosen the hexagonal socket screw C on the presser bar holder Adjust the distance between the presser foot D and the needle plate E to 6 0 m...

Страница 12: ...ctor dial with the maximum zigzag width and remove the front cover see page 5 2 Loosen the hexagonal socket screws 2 pcs 3 Adjust the needle swing by turning the handwheel while holding the worm so as...

Страница 13: ...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 the maximum...

Страница 14: ...move the needle bar supporter to direction A If clearance is too narrow move the needle bar supporter to direction B 4 Tighten the hexagonal socket screw NOTE After this adjustment check that the cle...

Страница 15: ...tween the needle and the shuttle race in the range of 0 05 to 0 10 mm 5 Set the pattern select dial at turn the handwheel to check if the clearance between the needle and inner edges of the shuttle ra...

Страница 16: ...the needle plate should be 0 75 to 0 90 mm If it is not in the range adjust as follows ADJUSTMENT PROCEDURE 1 Open the shuttle cover 2 Lower the presser foot and turn the handwheel toward you until th...

Страница 17: ...the handwheel toward you until the tip of the shuttle hook meets the left side of the needle 6 Loosen the hexagonal socket screw 7 The distance between the top of the needle eye and the tip of the sh...

Страница 18: ...p of the shuttle hook meets the left side of the needle 6 Loosen the hexagonal socket screws 2 pcs 7 While holding the shuttle hook so it doesn t turn turn the handwheel toward you until the needle co...

Страница 19: ...ch density The range of 9 to 12 stitches in the right side row backward feeding against 10 stitches in the left side row forward feeding is considered acceptable ADJUSTMENT PROCEDURE 1 Check the stitc...

Страница 20: ...d backward feeding during stretch stitch patterns make an adjustment as follows ADJUSTMENT PROCEDURE 1 Remove the cap 2 Set the pattern selector dial at and the stitch length dial at S S 3 Turn the st...

Страница 21: ...g with the automatic buttonhole foot Adjusted as follows ADJUSTMENT PROCEDURE 1 Attach the buttonhole foot R 2 Pull down the BH lever Turn the adjusting screw D until the BH lever knob slightly touche...

Страница 22: ...rn selector cam 4 Loosen the setscrew 5 Push the convex part of the cam follower releasing arm in the direction of arrow until the cam follower releasing arm touches position A of the pattern select c...

Страница 23: ...e tension is too loose it can cause the belt to jump 2 The correct motor belt tension is when the deflection of motor belt is about 7 to 9 mm when pushing the motor belt by finger with a 300 grams for...

Страница 24: ...cover WIRING 1 Remove the rear cover see page 6 2 Remove the setscrews A B and machine socket cover 3 Follow the above procedure in reverse Motor cord Cord from printed circuit board C LED Motor cord...

Страница 25: ...23 PARTS LIST...

Страница 26: ...24 MODEL Magenta 43 PARTS LIST 1 2 3 4 7 7 5 6 8 9 10 11 12 9 14 15 16 13 37 37 36 35 34 33 28 29 30 31 32 17 16 12 13 26 27 12 20 19 23 22 21 13 12 13 25 24 18 12 Page 10 No 12...

Страница 27: ...r unit Rear cover Spool pin hole Spool pin no hole Spool pin spring Setscrew 3x10 B Spool pin spring base Spring Setscrew 4x6 Nut 4 3 7 Bed cover plate Setscrew TP 4x6 Setscrew 4x8 Setscrew 4x12 B Set...

Страница 28: ...26 MODEL Magenta 43 PARTS LIST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 27 27 36 38 37 39 16 34 33 26 35 29 30 31 32 17 18 21 19 23 22 24 16 20 28 26 25...

Страница 29: ...Setscrew 4x6 Washer 4 Bolt 4x8 Presser bar Presser bar spring Presser bar bracket Hexagonal socket screw 4x8 Presser foot lifter Snap ring E 5 Tension release lever Snap ring CS 5 BH regulating lever...

Страница 30: ...28 MODEL Magenta 43 PARTS LIST 27 28 26 23 21 24 25 1 4 7 6 22 3 2 5 8 14 15 9 10 11 12 13 16 21 20 17 18 19...

Страница 31: ...x8 Needle threader plate unit Setscrew 3x5 Needle threader set plate Hexagonal socket screw 3x4 Needle bar supporter pin Spring washer Snap ring E 4 Needle Hexagonal socket screw 5x5 Needle bar suppor...

Страница 32: ...30 MODEL Magenta 43 PARTS LIST 10 1 8 7 8 6 6 5 3 4 2 9 14 15 15 13 16 17 18 19 20 21 22 12 11 30 23 24 25 26 29 28 27...

Страница 33: ...ring E 8 Handwheel unit Handwheel Balance weight Setscrew 3x10 B Clutch spring Setscrew 4x8 Clutch cap Crank rod unit Feed cam Crank rod Crank cam Crank cam plate Setscrew 3x12 B Hexagonal socket scre...

Страница 34: ...32 MODEL Magenta 43 PARTS LIST 13 6 19 17 18 22 21 24 20 6 23 14 15 16 30 31 32 2 33 34 35 28 27 25 26 29 2 12 2 7 9 8 11 10 3 5 6 1 2 6 4...

Страница 35: ...Setscrew Adjustable lock nut 4 Feed regulating rod Reverse link Setscrew SS rod Setscrew 5x8 Feed regulator spring R button R button spring R button shaft Snap ring CS 4 Setscrew 5x10 Zigzag mechanis...

Страница 36: ...34 MODEL Magenta 43 PARTS LIST 1 2 3 4 4 6 5 10 8 13 7 4 9 8 14 15 12 11 16 8 8 17 18 19...

Страница 37: ...04 000172602 735061101 639036003 822070003 735236006 639037004 000001609 735610101 532096007 647515006 102261000 Needle plate Setscrew Lower shaft gear unit Hexagonal socket screw 5x5 WP Washer Bushin...

Страница 38: ...36 MODEL Magenta 43 PARTS LIST 1 2 6 5 4 10 11 12 3 7 8 6 9 10 11 12 24 25 23 26 27 6 13 21 22 15 16 14 17 19 18 20 6...

Страница 39: ...ng arm unit Feed lifting arm Feed lifting pin Feed lifting roller Feed lifting spring Feed lifting shaft Drop feed selecting plate Setscrew 4x12 Feed lifting shaft holder Setscrew 4x6 Feed rod Feed ro...

Страница 40: ...38 MODEL Magenta 43 PARTS LIST 1 2 3 4 5 6 7 8 9 18 11 12 13 14 15 17 16 14 10 8...

Страница 41: ...11029008 508143005 508515105 000103509 000101404 000115504 000053008 650166008 Machine sokcet whole unit Motor assembly unit including bracket Motor with pully Machine socket unit Insulating paper Pri...

Страница 42: ...40 MODEL Magenta 43 PARTS LIST 1 2 3 4 5 6 7 8 9 10 11 12...

Страница 43: ...6870198 647803004 102261000 647808009 639804000 740801004 611406002 737801015 620404008 045501005 306801648 741811000 Accessory set Screwdriver Bobbin Seam ripper Needle set unit Automatic buttonhole...

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