32
C. Adjustment of the movable and fixed knife
a) Adjustment of the movable knife-edge and hook stopper
ⓐ When a movable knife① passes the front side of the hook stopper②, limit the clearance to be within 0.7~0.8 mm range as the
picture③ shows. The upper surface of the movable knife-edge④ should be set up 0.35~0.45mm below the lower side of hook
stopper⑤.
ⓑ Clearance adjustment of the movable knife-edge and hook stopper front side
※Loosen the needle plate and secure the hook stopper on the needle plate
※Unfasten the fixing screw⑥ of the movable knife shaft eccentric bushing⑦. Insert a thin driver or any adequate size pin into
the hole⑧ of the eccentric bushing⑦ and turn it to the left and right. The clearance will be adjusted as the position of the
movable knife shaft⑨ changes.
※After the clearance adjustment, retighten the bushing fixing screw⑥ firmly.
③
⑤
⑦
⑨
⑥
①
⑧
[ Fig. 55 ]
①
②
④
⑦
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