MECHANICAL ADJUSTMENT
BOBBIN THREAD TENSION
CORRECT SETTING
SET THE BOBBIN IN THE BOBBIN CASE AND PASS THE THREAD (COTTON #50) THROUGH THE
TENSION SPRING.
THE BOBBIN THREAD TENSION SHOULD BE 45G - 55G WHEN PULLING THE THREAD IN THE
DIRECTON OF B.
IF THE TENSION IS OUT THE RANGE, ADJUST IT AS FOLLOWS:
TO ADJUST
1. TURN THE ADJUSTING SCREW C IN THE DIRECTION OF D WHEN THE BOBBIN THREAD
TENSION IS TOO TIGHT.
2. TURN THE ADJUSTING SCREW C IN THE DIRECTION OF E WHEN THE BOBBIN THREAD
TENSION IS TOO LOOSE.
COTTON THREAD #50
E
D
C
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