– 12 –
15. Timing between upper and lower looper
[Checking items]
1
Lower looper
2
Upper looper
* Check that the clearance between the projecting part of lower
looper
1
and the blade point of upper looper
2
is 0.5 ± 0.2
mm
A
when the upper looper
2
goes up and the blade point
of upper looper
2
meets the top end of lower looper
1
.
* Check that the front-to-back clearance between the blade point
of upper looper
2
and the lower looper
1
is 0.1 to 0.3 mm
B
.
[How to perform adjustment]
○ Loosen the setscrews
E
of the upper looper cam
D
.
○ Rotate the upper looper cam
D
to perform adjustment
A
.
○ Tighten the setscrews
E
.
○ Loosen the setscrew
C
of the upper looper
2
.
○ Move the upper looper
2
front or back to perform adjustment
B
.
○ Tighten the setscrew
C
.
E
E
D
C
2
2
1
1
0.5 ± 0.2 mm
A
A
Rear view
F
Arrow view F
Rear view
2
1
G
2
1
Arrow view G
0.1 to 0.3 mm
B
