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(1) Loosen the setscrew (NO.3) of the upper thread tension regulator (NO.2) by a hexagonal
wrench.
(2) Adjust the position of the upper thread tension regulator (NO.2)..
(3) Tighten the setscrew (NO.3).
7-17. Adjustment of the synchronizer
[NOTE] (a) When the sewing is finished, the arm timing mark
mark
the running. This is the normal condition.
(b) If theses timing mark
adjust the timing mark matching.
Hold the sewing machine pulley (No.1) by hand and insert the angle adjuster (No.2) into the
hole
C
then, turn the angle adjuster (No.2).If turn the angle adjuster (No.2) to the
clockwise, the pulley timing mark
pulley timing mark
box.
A
B
B
are matched with each other then, the sewing machine is stopped
A
and
B
goes up and if turn it to the counter clockwise, the
B
comes down. The angle adjuster (No.2) is enclosed in the accessory
B
get out of the matching more than 3mm,
－31－
A
and the pulley timing
1
C
2
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