[ Fig. 38 ]
■ Adjusting Upper Thread Feeding Wire
After unfasten the fixing screw①, adjust remainder of
upper thread by moving upper thread feeding wire②.
In order to make the remainder short, move to arrow
A direction and to make the remainder long, move to
arrow B direction.
[ Note ]
If tension of auxiliary thread tension adjusting device
stud③ is too strong, it becomes difficult to adjust
remainder of upper thread.
Adjust auxiliary thread tension adjusting device stud③ as
weak as possible that thread adjusting device dish④
rotates gently.
※ At this time, upper thread tension changes and so
adjust upper thread tension.
[ Fig. 39 ]
30
③
④
①
AB
②
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