Trial Run (Pedal Operation); Machine Stop Position Check - SunStar KM-1957-7 User Manual

4-7. Trial run (Pedal operation)

·Make sure not to touch or press down parts that are operating or moving during operation. Failure to follow
the safety rules may result in physical injuries or mechanical damages.
Notice
1. Press pedal lightly to the position of B to check if the
machine is operating low-speed sewing.
2. Press pedal to the position of C to check if the machine is
operating high-speed sewing.
3. Press pedal backward and forward. And then put the pedal at
neutral position of A to check if needle stops lower than the
upper surface of needle plate.(in case that needle down stop
is set)
4. When pressing pedal to the position of D(or pressing pedal
the position of to D and then replacing pedal to the position
of A), needle will stop higher than the upper surface of
needle plate after trimming.
4-8. Function of up/down stop button of needle bar (Auto
thread trimming type)
1) You can move the needle bar up and down by pressing a
Up/Down Stop Button of Needle Bar① when the
machine stops. If you press the button, the needle at the
bottom would move up. If you press the button two times
consecutively, the needle bar at the above would move
down.
2) Check the stop position of sewing machine
Check the stop position of the machine after operating a
needle up/down by pressing the button①. There can be
something wrong with the thread trimming function
when the stop position is incorrect. Then adjust the
position of upper stop sensor bracket assembled inside
the motor cover.
3) Remove the pulley and the motor cover, loosen the
fixation screw② of upper stop sensor bracket. Adjust the
upper stop sensor bracket③ to the arrow direction then
take the stop position of needle bar.
18
A
B
C
(Needle up)
①
③
②
D
[ Figure 18 ]
(Needle down)
[ Figure 19 ]