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Adjustment Procedure
Results of Improper Adjustment
❶
Knife driving cam
❷
Feed cam
❸
Lower looper cam
❹
Upper looper cam
❺
Needle driving cam
○
Screw No. 1 is tightened in the at section of the main shaft
(the gure below).
❻
Positioning collar
❼
Marker on the handwheel
○
The marker is aligned with the marker on the side face of the
cover at the upper dead point of the needle.
If the marker on the handwheel
cannot be aligned with the marker
on the cover:
Deviation by 180º: The hand-
wheel is installed in the wrong
manner. Remove the handwheel
and re-install it with turned by
180º.
Deviation by approximately
120º: The screw No. 1 of needle
driving cam
❺
is incorrectly posi-
tioned.
Screw No. 1
❺
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