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Mechanical Adjustment
MODEL: AirThread 2000D
To adjust the pre-tension
Use a standard thread #50 to check the tension of the looper pre-tension.
Standard tension:
Lower looper pre-tension setting slider set to “STD.”: 1 gf or less.
Lower looper pre-tension setting slider set to “TIGHT”: 45-55 gf.
To check:
1. Open the looper cover and remove the belt cover.
2. Check the tension of the lower looper pre-tension with
the standard thread.
3. If the thread tension is not correct, adjust the tension
by inserting a screwdriver in the slit of the thread
tension shaft and turning it.
⇨ If the tension is too tight, turn the thread tension
shaft counterclockwise.
⇨ If the tension is too loose, turn the thread tension
shaft clockwise.
4. Check the thread tension again. Repeat the procedure
of step 3 until the thread tension becomes correct.
5. Attach the belt cover and close the looper cover.
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