7
MECHANICAL ADJUSTMENT
TOP TENSION
TO CHECK:
THE STANDARD UPPER THREAD TENSION SHOULD BE 75 - 90g WHEN PULLING THE
THREAD (COTTON THREAD #50) IN THE DIRECTION OF (B) WITH SETTING THE TENSION
DIAL AT “4”. (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 FACE COVER AND FRONT COVER. (SEE PAGE 4, 5.)
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 AND FACE COVER.
(C)
(E)
(D)
(B)
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