SunStar KM-380BL, User Manual

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7) Adjusting presser foot pressure
KM-380BL/390BL
Turning the tension adjustment screw clockwise will make the
presser foot pressure stronger, and counter clockwise to make it
weaker. (Refer to Figure 16)
8) Adjusting forward and reverse stitch length
KM-380BL/390BL
a. The stitch length adjustment is finished when you coincide
the indication line of the pipe with your desired stitch
length on the gauge using the nut .
b. Turning the nut clockwise makes the stitch length smaller
and counter clockwise makes it bigger.
c. When the reverse stitch length is needed, pull downward the
lever . (Refer to Figure 17)
[Figure 16]
[Figure 17]
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 should slip.
▶
When adjusting the machine with the switch on, be sure to pay extreme caution to the safety.
▶
Only trained engineers must perform repair or inspection of the machine.
▶ For electrical repair or inspection, always consult with qualified technicians or agent.
b. Adjusting the thread take up spring tension
- As in Figure 15, loosen the shaft screw of the thread adjustment assembly, and insert the driver into the groove of the
thread tension control assembly shaft . Turn clockwise to make the spring tension of the thread take up stronger and
counter clockwise to make it weaker.
c. Adjusting operation timing of the thread take up spring
- As in Figure 15, loosen the stopper screw , and turn the thread take up spring gauge clockwise to make the operation
timing of the thread take up spring faster, and clockwise to make it slower.