1. Turn the pulley until the needle bar comes to the lower dead point.
2. Loosen the needle bar connection screw .
3. Based on the upper engraved marker line of the needle bar lower
dead point, tighten the needle bar connection screw .
4. The needle shall be positioned in the center of the throat plate
hole.
– 6 –
1. When the motor shaft is rotated, the needle bar rocking link
makes a rocking motion by the effect of the eccentric cam .
2. Turn the power OFF, rotate the motor shaft , and confirm that the
needle makes a uniform rocking motion in the oblong hole of the
throat plate .
3. If the needle motion is not uniform, insert a tool from the hole on the
top surface of machine arm and loosen the needle bar rocking arm
setscrew for adjustments.
4. In the case of eccentricity to the left, confirm whether the sensor slit
is located in the edge position of the sensor .
5. In the case of deflection, loosen the sensor slit setscrew or the
sensor setscrew for adjustments.
* For fine adjustments, use of the sensor setscrew is adequate.
6. After the power is ON, the needle comes in the center of the
throat plate hole.
To make sure, examine [(11) Needle and Hook Timing Adjustments
and (12) Needle and Hook Clearance Adjustments] (Hook
Adjustment).
Adjustment Procedures Results of Improper Adjustment
Adjustment Procedures Results of Improper Adjustment
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