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10. Position of balance weights and cams
1
Feed cam
2
Lower looper and upper knife combined cam
3
Upper looper cam
4
Needle bar driving cam
5
Main shaft
6
1st setscrew
7
1st setscrew
7 6
5 4321
11. Projecting amount of upper looper
[Checking items]
1
Upper looper
2
Needle
* Check that distance (projecting amount) from the center of nee-
dle
2
to the blade point of upper looper
1
is 4.0 ± 0.2 mm
A
when the upper looper
1
is in its leftmost position.
[How to perform adjustment]
○ Set the upper looper
1
in its leftmost position
B
.
○ Loosen the setscrew
C
of the upper looper arm.
○ Move the upper looper siding shaft
D
to perform adjustment.
○ Tighten the setscrew
C
of the upper looper arm.
D
C
B
2
1
A
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