SunStar KM-857J Series User Manual page 30

High speed post bed, 1-needle needle feed lock stitch machine with thread trimmer for reinforcement stitch of jean
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(3) Adjusting movable knife and fixed blade(See figure 45)
A) Adjusting the position of movable knife and hook
a) As in picture
screw ③ to adjust the movable knife so that the
edge of the movable knife ① sits at the very center
of the hook's ② V-shaped groove. Tightly fasten
after sideway adjustment.
b) Adjust the distance between the movable knife ①
and the upper side of the hook ② to be 0.5mm.
※To adjust, unfasten the clamp screw ⑤ of the
hood shaft gear and the clamp screw④ of the
movable knife shaft collar. Vertically adjust the
movable knife shaft ⑥, and then tightly fasten the
clamp screws ④⑤.
B) Adjusting movable and fixed knife (See figure 46)
a) Like in figure 46, manually operate the movable knife ① and then slowly reposition it in its original place. Now,
just like in the figure, place the fixed knife so that the fixed knife ③ edge ④ touches 3mm before the movable
knife's trimming point ②.
b) Match the upper side of the fixed blade ③ and movable knife ①. Fully adhere the upper
the fixed blade edge with the outer side of the movable knife edge.
c) Under this condition, tightly fasten the fixed blade clamp screw⑤. Be careful so that the fixed blade does not
move.
d) Once the adjustment is complete, operate manual trimming once again to check the crossing of the movable and
fixed knives crossing.
30
unfasten the movable knife fixing
※ The crossing between movable
knife and fixed blade.
Matching upper side
[Figure 45]
and lower
parts of
(Good)
(Bad)
(Bad)
[Figure 46]

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