To Adjust The Clearance Between The Needle And The Upper Looper - Janome FOUR-DBL Service Manual

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