29
Mechanical Adjustment
MODEL: AirThread 2000D
To adjust the clearance between the needle and the upper looper
When the upper looper meets the right needle or the left needle, each clearance should be -0.05 to +0.05 mm.
To check:
1. Turn the handwheel toward you until the upper looper
moves to the right from the leftmost position, the
needle bar goes down from the highest position and
the rear bulge of the upper looper intersects the left
needle and right needle.
2. Check if the clearance between the rear bulge of the
upper looper and the left needle or the right needle is
-0.05 to 0.05 mm.
NOTE:
Adjust after adjusting the timing of the needle and the
lower looper, the position of the tip of the upper looper
and the leftmost position of the upper looper, the timing of
the upper looper and the lower looper and the clearance
between the upper looper and the lower looper, and the
clearance between the needle and the upper looper (Refer
to pages 24 to 29.)
1. Open the looper cover.
2. Turn the handwheel toward you until the upper lower
moves to the right from the leftmost positon, the
needle bar moves upward from the lowest point and
the rear bulge of the upper looper intersects the left
needle or the right needle.
3. Loosen the setscrew and adjust the clearance
between the needle and the rear bulge of the upper
looper by moving the upper looper to the front or the
rear.
NOTE:
Do not move the upper looper to the right or the left.
Otherwise, the timing will be wrong.
4. Partially tighten the setscrew and check the position
of the tip of the upper looper, and the clearance of the
upper looper and the lower looper (Refer to pages 25
and 28).
5. Tighten the setscrew.
6. Close the looper cover.
Upper looper
Lower looper
Setscrew
Rear bulge of the upper looper
Needle
