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9) Adjustment of Thread Release Shaft
Adjust the thread release shaft to ensure when the
presser foot ascends, the thread tension discs are
released and to ensure when the presser foot descends,
the thread tension discs are tightened.
A. Loosen the adjusting screw ①.
B. Spin the thread release shaft ② to make the thread
tension discs start loosening when the presser foot is
4mm above the needle plate.
C. When the adjustment is complete, tightly fasten the
adjusting screw ①.
10)
Adjustment of Lower Thread Take-up Timing
When the looper starts moving backward, make
adjustment to let the lower thread take-up ① contact the
thread ② and 7mm away from the lower thread take-up
base ③.
A. Insert the screwdriver into the adjustment hole on the
lower thread take-up base and loosen the two
adjusting screws④.
B. Lift the lower thread take-up ① from the lower
thread take-up base by 7mm.
C. Tightly fasten the two screws ④ after adjustment.
②
①
8)
Adjustment of Upper Thread Adjusting Cam
The maximum tolerance between the upper thread
tension adjuster ② and the upper thread tension plate ③
is 0.5~0.7mm (2-needle) or 0.8~1.0mm (3-needle).
Loosen the adjusting screw ① and move the upper
tension adjuster ② in and out to set the maximum
tolerance between the adjuster ② and the upper thread
tension plate ③ to be 0.5~0.7mm (2-needle) or
0.8~1.0mm (3-needle).
※ If tolerance between the upper thread adjuster ② and
the upper thread tension plate ③ is reduced, the
tension gets higher.
①
②
③
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