－35－
7-20-2. Adjustment of Y stepping motor position
(1) Remove the motor cover.
(2) Loosen 4 setscrews of the Y-stepping motor adapter (NO.2).
(3) Press the Y-motor adapter (NO.2) to arrow direction lightly.
(4) Fasten setscrews (NO.4) securely, and put the motor cover to original position.
[NOTE] After adjustment, please make sure that there is no gap in the gear mechanism.
[NOTE] Please grease gear periodically for reduction of noise or abrasion.
7-21. 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 10 mm 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 nut (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
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