5
MECHANICAL ADJUSTMENT
NEEDLE THREAD TENSION
TO CHECK:
THE STANDARD UPPER THREAD TENSION SHOULD BE 65–95 g WHEN PULLING THE
THREAD (COTTON THREAD #50) IN THE DIRECTION OF (B) WITH SETTING THE TENSION
DIAL AT “3.” (MAKE SURE THE FOOT SHOULD BE LOWERED.)
IF THE TENSION IS OUT OF THE STANDARD RANGE, ADJUST IT AS FOLLOWS:
ADJUSTMENT PROCEDURE:
1.
REMOVE THE FRONT COVER UNIT (SEE PAGE 6).
2.
TURN THE ADJUSTING NUT (C) IN THE DIRECTION OF (D) WHEN THE UPPER THREAD
TENSION IS TOO TIGHT.
TURN THE ADJUSTING NUT (C) IN THE DIRECTION OF (E) WHEN THE UPPER THREAD
TENSION IS TOO LOOSE.
3. ATTACH THE FRONT COVER UNIT.
(B)
(C)
(E)
(D)
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