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Chapter 10 Adjustment
4.Adjustment of Timing Between Needle and Rotary Hook
1.Turn the power switch on.
2.Check that the machine pulley is at the stop position (at 100˚ of the scale). If not, turn the pulley until it comes to the stop position.
3.While the machine is at the stop position, press the JOG switch ( ) while holding down the STOP switch. "AJST" is indicated on the display.
STOP
140°
150
200
Rotary hook's point
4.Pressing the START switch. "STEP" is indicated. The rotary hook in each machine head rotates to the currently set timing position and the rotary hook can be adjusted.
5.Turn the machine pulley manually until the relationship between the needle point and
the rotary hook's point can be easily checked (at around 140° of the scale).
6.Press the STEP BACK/FWD switch to move the rotary hook for each head to adjustment.
•STEP BACK
For rotating the rotary hook little by little in the clockwise direction
•STEP FWD
For rotating the rotary hook little by little in the counterclockwise direction
Make this adjustment for each machine head so that the needle and the rotary hook's point can fit with each other.
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