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7-19-2 Adjustment of the Y timing belt tension
1) Loosen the bracket set screws (No.1).
2) Tighten the tension adjusting screw (No.2). The Y timing belt tension will be increased.
3) After the adjustment, tighten the bracket set screw (No.1) securely.
2)
1)
7-20 Adjustment of the V belt tension
NOTE
After operated the sewing machine for a long period, the V belt tension becomes loose. Adjust
the V belt tension periodically. The proper V belt tension is standing that it is bent about 10mm
with the hand pressure of 1.0kg as it shown on the figure.
1) Turn the power switch OFF.
2) Remove the V belt covers.
3) Loosen two nuts (No.2,3) on the motor position adjust bolt (No.1).
4) Fix the motor (No.5) position with putting the tension to the V belt by its weight and firstly, tighten the
upper nut (No.2) then secondly, tighten the lower nut (No.3).
4)
1)
2)
3)
5)
10mm
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