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12) Adjusting the Hand Pulley Device
A. Tighten the screw after putting the hand pulley
gear and the hand pulley shaft tip in accord.
B. Adjust the clearance of hand pulley gears
and and tighten the screws.
C. Move the bushing in the direction of the arrow
to reduce the backlash between gears and
when the roller is on the end of the pulley
bushing.
11) Adjusting the Upper Thread
Detecting Device
A. Unfasten the thread detecting plate screw with
the thread off the take-up spring and make the
take-up lever spring touch the detecting plate.
Then, tighten the screw.
B. Be sure to adjust the detecting plate so the
take-up lever spring and the detecting plate will
connect with each other even when the take-up
lever spring stroke changes.
[ Caution ]
Be careful not to touch with any other metals
except take-up lever spring. If it does, detection
may be failed.
10) Adjusting the Main Thread Control
Device
A. When the tension control nut ① of the thread
control device is turned clockwise, the upper
thread is tightened and becomes loose as the
nut is turned counterclockwise. Adjust the
tension according to the sewing conditions such
as material, thread, number of stitches etc.
B. To tighten the take-up lever spring, use a driver
to turn the groove ② on the edge face of the
thread tension control device shaft clockwise.
And to make the spring relax, turn it couner-
clockwise.
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