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1) Adjustment of the thread trimming cam position
1. Let the sewing machine fall down, loosen two stopper plate setscrews
A
, and remove the stopper plate
B
.
2. Assume the condition such that the thread trimming solenoid is
attracted by hand.
3. Loosen and adjust the thread trimming cam setscrew so that the
gap length becomes 2mm between the thread trimming cam and
the cam follower .
4. After adjustment, tighten two thread trimming cam setscrews .
(Caution) After adjustment, make confirmation according to [3.-
(11)-3) Standard timing for the thread trimming cam].
[Type I]
5. Fix the stopper plate
B
with the two stopper plate setscrew
A
.
[Type II]
5. Apply a slightly increased amount of appropriate grease (JUKI
Grease A) to Part
E
of the stopper plate
B
and Part
F
of the
stopper guide
D
.
6. Insert the stopper spring
C
and the stopper guide
D
in this order in
Part
E
of the stopper plate
B
.
7. Fix the stopper plate
B
with two stopper plate setscrews
A
.
2) Adjustment of the thread trimming link stopper screw
1. Turn the hand wheel and adjust the thread trimming roller to the
inlet section
G
of the thread trimming cam groove.
2. Loosen the thread trimming link stopper setscrew B .
3. Move the thread trimming link stopper setscrew A and adjust the
clearance to be uniform between the thread trimming roller and
the thread trimming cam groove on both inside and outside.
4. Tighten the thread trimming link stopper setscrew B .
In this case, make sure that the thread trimming link stopper setscrew
A does not move.
5. Try to move the cam follower to the right and left and confirm that
the thread trimming roller enters smoothly without touching the
thread trimming cam groove.
Adjustment Procedure Results of Improper Adjustment
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