35
13) 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 variation 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.
[ Fig. 50 ]
Hand Pulley Shaft
Upper Shaft
Roller
Hand Pulley
Bushing
12) 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 adjut 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.
[ Fig. 49 ]
[ Caution ]
Be careful not to touch with any other metals except
take-up lever spring. If it does, detection may be failed.
Thread Take-up
Spring
Thread
Detecting
Plate
Screw
11) 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 counterclock-
wise. 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 facet of the thread tension
control device shaft clockwise. And to make the spring
lax, turn it counterclockwise.
[ Fig. 48 ]
①
②
Thread Take-up
Spring
Summary of Contents for SPS/A-1811 SERIES
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