SunStar KM-957 Series, User Manual, Page: 18 / 32

18
[Figure 27]
⑷
Adjusting the thread release stroke. (for automatic trimming type)
If the upper thread falls out from the needle hole after trimming, check whether the plate
①
opens while the trimming is
in action. For the adjustment of plate opening level, put the solenoid ② in action, and adjust by moving solenoid collar
③
back and forth to make the opening of the thread tension adjusting plate
①
0.8 mm. Also, when the thread release
solenoid is not in action, check whether the plates are closely adhered to each other.
(Caution)
※
If the plates do not open enough during trimming action
even when the assembling is correctly done, check
whether or not the upper thread length adjustment
volume, which is at the front of the control box, is low.
⑸
Adjusting the auxiliary thread tension control assembly
(automatic trimming type)
As in Figure 28, when the auxiliary thread tension
adjustment nut ① is turned clockwise, the length of the
thread after trimming gets short. The other way makes
the thread long. The appropriate length of the upper
thread on the needle after trimming is 35~45mm. (This
can also be done by using the remaining upper thread
length adjustment volume of the control box.)
[Figure 28]
Small
Big
Caution
▶
After disassembling and adjusting a safety device, always place it back to the original position
and check whether it functions as intended.
▶ Use both hands when pushing the machine backward or returning it to the original position.
Due to the weight of the machine, your hand can get stuck in the machine if you slip.
▶ When adjusting the machine with the switch on, be sure to be extremely cautions.
▶
Only trained engineers must perform troubleshooting or inspection of the machine.
▶
For electrical repair or inspection, consult with qualified technicians or agent.
About 0.8mm