To Adjust The Clearance Between The Needles And The Upper Looper - Janome 990D Service Manual

TO ADJUST THE CLEARANCE BETWEEN THE NEEDLES AND THE UPPER
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.
Needle #14
(Fig. 1)
Clearance
Upper looper
Upper looper
LOOPER
(Fig. 2)
23
Setscrew A
Upper looper
driving shaft
990D