Adjusting Presser Foot Pressure; Adjusting Stitch Length - SunStar KM-640UBL-7 User Manual

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▶ After disassembling and adjusting a safety device, always place it back to the original position
▶ Use both hands when pushing the machine backward or returning it to the original position.
▶ When adjusting the machine with the switch on, be sure to pay extreme caution.
▶ Only trained engineers must perform troubleshooting or inspection of the machine.
▶ For electrical repair or inspection, consult with qualified technicians or agent.

10) Adjusting presser foot pressure

As shown in Figure 28, the pressure of the upper feed
presser foot becomes stronger when you turn the pressure
adjustment screw① clockwise, and becomes weaker in case
of turning it counterclockwise.
After the adjustment, be sure to tight the fixing nut②.
The auxiliary presser foot is same to the upper feed presser
foot: the pressure increases when you turn the pressure
adjustment screw③ clockwise, and becomes weaker in case
of turning it counter clockwise.
After the adjustment, be sure to tight the fixing nut④.
In case of fine adjustment, use the auxiliary pressure
adjustment screw⑤.

11) Adjusting stitch length

As shown in Figure 29, the number marked in the stitch
control dial① means the stitch width in mm. Adjust it in
sideways and fix it to your desired number of stitch width.
and check whether it functions as intended.
Due to the weight of the machine, your hand can get stuck in the machine if you should slip.
Caution
weaker
stronger
weaker
stronger
[Figure 28]
[Figure 29]
19

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Km-640bl-7Km-640ublKm-640bl

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