7
Adjusting Tensions
To check the bobbin tension, insert a bobbin wound
with medium weight thread into the bobbin case. Remove the
hook from the machine. Snap the bobbin case onto the hook.
Hold the hook and bobbin case by the bobbin thread and jerk
the thread once or twice. The bobbin and hook should move
down a bit. If the hook does not stop moving down the tension is
too loose. If the hook does not move the tension is too tight.
If the tension is too tight, turn the screw counterclockwise ¼
turn at a time and retest. If the tension is too loose, turn the
screw clockwise ¼ turn at a time and retest.
Continue to loosen or tighten the tension screw until the hook
only moves down about ½” when you jerk the thread.
It is rare that you have to adjust your bobbin tension. Mainly if
the tension spring was bent or for specialty sewing.
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