21
Mechanical Adjustment
MODEL: AirThread 2000D
To check:
1. Open the looper cover and the side cover.
2. While pressing the upper knife release knob, turn it
clockwise by half a rotation to deactivate the upper
knife.
3. Remove the left needle.
4. Attach an HAx1 SP #11 needle as the right needle.
5. Turn the handwheel toward you until the tip of the
lower looper comes from the left to the rear groove of
the right needle.
Check if the clearance between the rear groove of the
right needle and the tip of the lower looper is 0 to 0.05
mm when the needle and the lower looper intersect.
7. Attach an HAx1 SP #11 needle as the left needle.
8. Check if the clearance between the rear groove of the
left needle and the tip of the lower looper is 0 to 0.05
mm when the needle and the lower looper intersect.
If not, adjust as follows.
To adjust the clearance between the needle and the
lower looper
1. Open the looper cover (unit) and the side cover (unit).
2. While pressing the upper knife release knob, turn it
clockwise by half a rotation to deactivate the upper
knife.
3. Remove the presser foot (unit).
4. Remove the needle plate.
5. Remove the left needle.
6. Attach an HAx1 SP #11 needle as the right needle.
7. Turn the handwheel toward you until the tip of the
lower looper comes from the left to the rear groove of
the right needle.
8. Check if the clearance between the rear groove of the
right needle and the tip of the lower looper is 0 to 0.05
mm when the needle and the lower looper intersect.
NOTE:
If the needle guard (front) pushes the front surface of the
needle, temporarilly move the needle guard (front) to the
front.
9. Loosen the bolt slightly. Adjust the clearance by
moving the lower looper base. After adjustment,
tighten the bolt.
NOTE:
During adjustment, make sure that the lower looper base
does not turn or the handwheel does not rotate.
Otherwise, the timing of the needle and the lower looper
will be wrong.
10. Attach an HAx1 SP #11 needle as the left needle.
11. Turn the handwheel toward you until the tip of the
lower looper comes from the left to the rear groove of
the left needle.
The standard clearance between the groove of the needle (HAx1 SP #14) and the tip of the lower looper is 0 to 0.05
mm when the needle and the lower looper intersect.
Upper knife release knob
Upper knife
Bolt
Setscrew B
Needle bar gauge
Needle
guard (front)
Lower looper
Needle bar gauge
Setscrew A
Needle bar lower bushing
Thumbscrew
Groove
Needle
guard (rear)
0.05 - 0.25mm
0 - 0.05mm
To adjust the clearance of the needle and the lower looper; and the clearance
of the needle and the needle guard (front) (1)
Needle bar gauge
Needle bar
Bolt
