To Adjust The Clearance Of The Upper Looper And The Lower Looper - Janome AirThread 2000D Service Manual

To adjust the clearance of the upper looper and the lower looper

When the lower looper moves to the right from the leftmost position, the upper looper moves upward from the lowest
position, and the tip of the upper looper comes behind the rear surface of the lower looper as shown in the figure, the
standard distance between the tip of upper looper and the rear surface of the lower looper is 0 to 0.1 mm.
Lower looper
0 to 0.1mm
Lower looper
Lower looper
Mechanical Adjustment
Upper looper
Upper looper
Setscrew
Upper looper
28
To adjust:
NOTE:
Adjust adjusting the position of the tip of the upper
looper and timing of the upper looper and lower looper,
the timing of the needle and the lower looper, and the
clearance of the upper looper and the lower looper (Refer
to pages 25, 27 and 28).
1. Open the looper cover.
2. While pressing the upper knife release knob, turn it
clockwise by half a rotation to deactivate the upper
knife.
3. Turning the handwheel toward you so that the upper
looper intersects the lower looper.
4. Loosen the setscrew. Adjust the clearance between
the tip of the upper looper and the rear surface of the
lower 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.
5. Partially tighten the setscrew and check the position of
the tip of the upper looper and the clearance between
the needle and the upper looper (Refer to pages 25
and 29.)
6. Tighten the setscrew.
7. Close the looper cover.
8. While pressing the upper knife release knob, turn it
clockwise by half a rotation to activate the upper knife.
MODEL: AirThread 2000D