−16 −
Adjustment Procedures Results of Improper Adjustment
1. Turn the alternate vertical movement dial to adjust the scale
“1” to the convex of the top cover.
2. Loosen setscrew ① in the alternate vertical movement dial
and remove the alternate vertical movement dial.
At this time, be careful since there are a pin and a spring in
the hole in section A.
3. Loosen setscrews ② for installing the alternate vertical
movement amount detecting switch and adjust the distance
from the inner diameter of the bush to the end face of the
switch main body to 8 ± 0.1 mm, and tighten the setscrews.
4. Adjust the scale “1” on the alternate vertical movement dial
to the convex of the top cover, place the pin and the spring in
the hole in section A, attach the alternate vertical movement
dial, and tighten the setscrew.
(Caution) When the position of the alternate vertical amount
detecting switch is changed, make sure that the
relation between the alternate vertical movement
dial and the sewing speed is proper.
• Sewing speed may not change
even when the alternate vertical
movement dial is turned.
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