23
990D
Setscrew A
Upper looper
driving shaft
Upper looper
(Fig. 2)
Clearance
Upper looper
(Fig. 1)
Correct Setting:
When the upper looper meets with the needle, the clearance should be 0 to +0.1 mm at the needle
on the left side and -0.05 to +0.05 mm at the needle on the right side.
To adjust:
1. Turn the handwheel toward your with your hand to bring the needle just behind the upper looper
in downward travel.
2. Loosen the setscrew A, and adjust the clearance between the needle and upper looper.
3. Tighten the setscrew A.
4. Check the clearance between the loopers.
TO ADJUST THE CLEARANCE BETWEEN THE NEEDLES AND THE UPPER
LOOPER
Needle #14
