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C. How to adjust the opening capacity of the thread guide disk
ⓐ Unfasten the thread release adjusting plate screw.
ⓑ Open the thread guide disk by operating the trimming devices.
ⓒ Adjust the opening capacity to 0.6~0.8mm for normal material and 0.8~1mm for heavy material.
To increase the opening capacity, widen the angle between the thread release plate and narrow
the angle to reduce the opening capacity.
ⓓ Tighten the screw after the adjustment.
[ Fig. 38 ]
Widen
Narrow
Floating Amount
Screw
Upper Shaft
To Thread Tension
Adjusting Ass’y
To Tension Release Link
Thread Tension Adjusting Plate
→
→
9) Adjusting the parts of wiper
A. Adjusting method of kinematic type wiper(SPS/D(C)-B1202-01, 02)
ⓐ Unfasten the wiper base plate bolt ②.
ⓑ When the thread wiper and the needle center are in a straight line, adjust the thread wiper base③
up and down that the interval between the needle① and the thread wiper can be 2.5mm, then
tighten the clamp②.
ⓒ Unfasten the wiper rod bolt ④.
ⓓ Adjust the thread connecting rod⑤ up and down that the thread wiper under sewing standby can
have the interval of 15~17mm from the needle center, then tighten the thread wiper rod clamp④.
ⓔ The thread wiper spring attached on the thread wiper base has the function to hold upper thread
after thread trimming, and its proper tension is about 20~30g. (A little stronger than the tension of
lower thread in the bobbin case)
[ Fig. 39 ]
[ Fig. 40 ]
③
②
Needle ①
2.5mm
④
⑤
⑥
15~17mm
If the disk is not opened appropriately, the amount of remaining thread may be not enough or
not regular, and the disk may not be closed completely.
Caution
If the wiper is not placed in the right position, the wiper may collide with the presser foot
or needle during the operation, and the wiper may not move properly.
Caution
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