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35
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7-21-2. Adjustment of Y stepping motor position
(1) Remove the motor cover.
(2) Loosen four setscres of the Y-stepping motor adapter (NO.2).
(3) Press the Y-motor adapter (NO.2) to arrow direction lightly.
(4) Fasten the setscrews (NO.4) securely, and put the motor cover to original position.
NOTE After the adjustment, please make sure that there is no gap in the gear mechanism.
NOTE Please grease gear periodically for reduction of noise or abrasion.
7-22.
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).
2
1
4
1
2
3
5
10mm
