JUKI MF-7900 Series Engineer's Manual page 23
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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Adjustment procedures
1.
Remove the top cover.
Loosen screw ❶ .
2.
Turn the eccentric cam ❷ . The direction of turning the eccen-
3.
tric cam and the relation between the eccentric cam and the
needle thread loop is shown in the following table.
•
Size of needle thread loop
A : Move forward
Loop becomes smaller. Loop becomes larger.
After the adjustment, fully tighten screw ❶ .
4.
* With the factory-adjusted value at the time of shipment, the
marker lines C are aligned.
B : Move backward
– 9 –
Results of Improper adjustment
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