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3-6 Adjustment of thread trimmer clutch plate collar
™ After assembling 1 thread trimmer solenoid link A, perform adjustment of eccentricity with 2 thread trimmer
clutch plate collar (adjustment of clearance between roller holding cam and link arm support plate) and adjust
clearance to 1 to 3 mm.
3-7 Confirmation of working and positioning of link arm fixing plate (Timing of thread trimmer
auxiliary cam, thread trimmer cam and thread trimmer holding cam)
™ Set thread trimmer solenoid asm. to ON state, and make pin at top end of thread trimmer auxiliary link perfectly
align with 1 thread trimmer auxiliary cam.
™ Rotate sewing machine by hand up to flat section
of 1 thread trimmer auxiliary cam (place where it
moves to extreme right-hand side). At this time, 2
thread trimmer solenoid link A moves to right-hand
side.
™ Looper link arm works and presses moving knife
roller arm since 2 thread trimmer solenoid link A
moves.
Turn handwheel and confirm time when link support
plate pin rides on flat portion of roller holding cam.
™ Confirm that thread trimmer contactor shaft caulked
in 3 moving knife roller arm enters groove in thread
trimmer cam.
™ Press thread trimmer contactor shaft a section of
2 moving knife roller arm to make it come in contact
with moving knife arm asm.
2 Thread trimmer clutch plate collar
Link arm support plate
1 Thread trimmer solenoid link A
Roller holding cam
1 to 3 mm
1 Thread trimmer auxiliary cam
3 Moving knife
roller arm
Moving knife arm
a
2 Thread trimmer
solenoid link A
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