JUKI MO-1000 Series Service Manual page 29

adjustment Procedure
Checking items:
1 Lower looper setscrew
2 Lower looper shaft
3 Lower looper
* Check that the distance from the center of the lower looper shaft 2 to
the lower blade point is 65.5 ± 0.15 mm (A).
How to perform adjustment:
○ Loosen the setscrew 1 of the lower looper 3 .
○ Move the lower looper 3 up or down to make adjustment.
○ Retighten the setscrew 1 .
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Results of Improper adjustment