16
3) Adjustment of needle and looper timing
- As in the figure, use the pulley to adjust the distance
between the bottom of the needle bar and the needle plate
face to be 12.8mm.
[Fig. 17]
- Adjust the distance between the retainer and the hooked needle to be 0.3∼0.5mm, the distance between the needle and the
looper to be 0.1∼0.2mm, and the distance between the looper groove and the bottom of the retainer to be 0.5mm.
[Fig. 18] [Fig. 19]
- Lift the needle bar by 1∼0.8mm from the lowest position
of the needle bar and align the tip of the looper with the
needle.
[Fig. 20]
4)
Lubrication Adjustment of Thread Take-Up Lever
As in Fig. 21, oil flow is at its maximum when the mark②
on the head of the oil flow control pin① and the center of
the hole③ on the thread take-up lever crank shaft is directly
aligned. In contrast, oil flow decreases when the mark is
turned closer to the corner⑤ of the link cam washer④.
Furthermore, if the mark passes the corner of the link cam
washer, oil will not flow at all.
[Fig. 21]
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