JUKI TL series Service Manual page 29

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 per-
fectly align with ❶ thread trimmer auxiliary cam.
○ Rotate sewing machine by hand up to flat section
of ❶ thread trimmer auxiliary cam (place where
it moves to extreme right-hand side). At this time,
❷ thread trimmer solenoid link A moves to right-
hand side.
○ Looper link arm works and presses moving knife
roller arm since ❷ thread trimmer solenoid link A
moves.
Turn handwheel and confirm time when link sup-
port plate pin rides on flat portion of roller holding
cam.
○ Confirm that thread trimmer contactor shaft
caulked in ❸ moving knife roller arm enters
groove in thread trimmer cam.
○ Press thread trimmer contactor shaft ⓐ section
of ❷ moving knife roller arm to make it come in
contact with moving knife arm asm.
○ Insert a clearance gauge of 0.5 mm to contact
part of ❹ moving knife roller arm asm. and ❺
looper link arm asm. and press ❺ looper link arm
asm. to ❹ moving knife roller arm asm.
○ In aforementioned state, make ❻ link arm fixing
plate come in contact with ❼ link arm support
plate pin, and fix it with setscrew.
○ Adjustment of position of ❽ nut of wire setscrew
(Refer to item 5 of adjustment of thread tension
disk open/close, p.27.)
○ After adjustment of position of looper, tighten
looper link setscrew. (Refer to item 4, p.27.)
❶ Thread trimmer
auxiliary cam
Moving knife arm
❺ Looper link arm
0.5 spacer
❹ Moving knife
roller arm
Roller holding cam
27
– –
❷ Thread trimmer
solenoid link A
❸ Moving knife
roller arm
ⓐ
❽ Nut
❼ Link arm support
plate
Setscrew
❻ Link arm
fixing plate
Link arm support
plate pin