Adjusting The Looper Thread Cam - JUKI MF-7900 Series Engineer's Manual
High-speed, cylinder-bed top and bottom coverstitch machine
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Also See for MF-7900 Series:
- Instruction manual (30 pages) ,
- Specification (8 pages) ,
- Quick start manual (2 pages)
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(17) Adjusting the looper thread cam
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Adjust so that thread comes off from the highest place of looper thread cam ❷ when needles come
1.
down and the top end of left needle ❸ aligns with the bottom surface of looper ❹ . Then tighten set-
screws ❶ in the looper thread cam ❷ to fix the looper thread cam ❷ .
2.
Adjusting the looper thread cam thread guide
3.
Preventing thread winding around the looper thread cam
Adjust the tightening amount of the screw so that the thread guide plate ❽ is able to return to its origi-
nal state by the spring force.
❾
Standard adjustment
Thread
❷
A
B
❻
❽
– 46 –
❸
❹
❶
A
B
❺
❼
❻
❼
❺
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