Replacement and Adjustment of Upper Shaft Sensor
During zigzag sewing, lateral movement of the needle should take place 7.4 to 9.8 mm above the
needle plate.
Adjustment procedure:
1. Remove the top cover (see page 15).
2. Select the zigzag stitch “ “ and turn the handwheel to check the lateral movement of the needle.
If the needle starts lateral movement higher than 9.8 mm: Loosen the setscrew (C) and turn the
upper shaft shielding plate in the direction of (A).
If the needle starts lateral movement lower than 7.4 mm: Loosen the setscrew (C) and turn the
upper shaft shielding plate in the direction of (B).
3. Attach the top cover.
To replace the upper shaft sensor:
1. Remove the front cover (see page 8).
2. Remove the board supporter (see page 23) and unplug the upper shaft sensor connector.
3. Remove the 2 setscrews (D) and remove the sensor mounting.
4. Remove the 2 setscrews (E) and remove the upper shaft sensor.
To attach:
5. Follow the above procedure in reverse.
7.4 to 9.8 mm
Setscrew (C)
(B)
(A)
Setscrew (E)
Upper shaft sensor
Sensor mounting
Setscrew (D)
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