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4. Position and protruding amount of looper
(Left/right position and moving amount)
4-1. Adjustment of left/right position of looper
○ Adjust with looper mas. asm.
❷
so that center of inner hook is aligned with center of lopper
❶
.
4-2. Adjustment of moving amount of looper
○ When thread trimmer solenoid is ON, top end of
looper comes in contact with bobbin case.
○ Adjust clearance between convex
❸
of looper
and
❹
looper cam to 1±0.2 mm. Loosen looper
link
❺
setscrew to adjust clearance.
4-3. Installing position of looper stopper plate
○ Adjust installing position of stopper so that clear-
ance between looper and looper installing base
is 0.5 to 1.0 mm, and tighten stopper plate with
setscrew.
5. Position of nut of wire setscrew
(Adjustment of thread tension disk open/close)
○ Lower presser foot.
○ Move thread trimmer solenoid link A with thread trimmer auxiliary cam,
❶
Thread tension disk has to open at
the time when roller rides on thread trimmer auxiliary cam. (Disk rise of 0.5 to 0.7 mm at scale 3.5)
○ Perform adjustment with
❷
nut on left-hand side after loosening
❸
nut on right-hand side.
○ Perform xing with nut located outside.
Nut of setscrew (Wrench 9 mm)
❶
Thread tension disk
0.5 to 1.0 mm
Looper
Looper installing bace
Rubber stopper
1±0.2 mm
❷
❸
❶
Looper and inner hook
❹
Looper cam (Position where it
comes in contact with looper)
❷
Looper mas. asm.
❸
Looper (Convex
that looper cam
pushes out)
❺
Looper link setscrew
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