–
27
–
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.)
Roller holding cam
Setscrew
❽
Nut
❻
Link arm
fixing plate
❹
Moving knife
roller arm
❺
Looper link arm
0.5 spacer
❼
Link arm support
plate
Link arm support
plate pin
❶
Thread trimmer
auxiliary cam
❸
Moving knife
roller arm
Moving knife arm
ⓐ
❷
Thread trimmer
solenoid link A
Summary of Contents for TL Series
Page 31: ......
