44
When the trimming device is in motion, the moving mes
① moves to the left and the fixed mes body④ moves to
the furthest left of the moving mes return spring.
When the distance between the tip of the clamp spring②
and the feed dog on the right side is 0~0.5mm, fasten the
screw⑦ to attach the fixed mes stopper(L)⑤ to a part of
the fixed mes body⑥.
The moving mes① returns from the furthest left along
with the needle thread and the looper thread.
Then it is overlapped with the fixed mes③. The meses
cut the needle thread and the looper thread.
Until the threads are cut off completely, the clamp spring
② should be 0~0.5mm away from the feed dog. This
position determines the length of the remaining thread
after sewing is finished.
· To make the remaining thread shorter, locate the
clamp spring on the left side.
· To make the remaining thread longer, locate the
clamp spring on the right side.
When the plunger of the cylinder is on the left side,
adjust the distance between the blade⑩ of the fixed mes
body⑧ and the fixed mes stopper(small)⑪ at
1.5~2.0mm. (If the trimming device doesn’t operate)
Loosen the screw⑨ for adjustment.
(7) Adjustment of Remaining Thread After Sewing Is Finished
[ Figure 82 ]
[ Figure 83 ]
0~0.5mm
1.5~
2.0mm
④
⑤
⑦
⑪
⑨
⑩
⑧
①
③
②
⑥
The clamp spring holds the looper thread after it cuts the
looper thread. Loosen the screw⑫ for pressure
adjustment.
· To increase pressure, turn the screw clockwise.
· To reduce pressure, turn the screw counter-clockwise.
Maintain pressure at the smallest level as long as the
clamp spring can hold the looper thread.
(8) Adjustment of Clamp Spring Pressure
[ Figure 84 ]
②
⑫
[ Warning ]
Before adjustments, always turn off the motor switch and check to make sure that the motor is in stop mode.
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