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Adjustment Procedure
Results of Improper Adjustment
1. The front and rear positions of the inner hook presser
❶
can be
adjusted by means of the setscrew
❷
.
[Standard adjusting value]
Fasten the needle entry section by means of the setscrew
❷
so
that it is located closer to the shoulder section toward the front side
from the center of the convex section of the inner hook presser
❶
.
(Caution)
When adjusting the hook shaft position, make sure of
the plunger movement without fail (the bobbing mo-
tion).
○ If the convex section of the inner
hook presser
❶
has any flaw, this
can be a cause of thread breakage
or uneven sewing.
In such a case, the damaged part
shall be replaced with a new one.
○ If the inner hook presser
❶
is
positioned inadequately, an extra
tension is exerted when the thread
comes out of the convex section.
This can be a cause of shrinkage
errors.
