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Service Manual
SEC.19
Adjustment of CAM sensor
Zigzag timing of needle is controlled by sensor cam and sensor located on main shaft.
Adjustment:
1. Loosen two screws (1& 2) on collar (A) fixing sensor cam.
2. Raise needle to its highest position.
3. Turn collar (A) with fixing sensor cam in either direction until needle start to move left
or right when needle goes up 9 to 10mm from surface on needle plate.
4. If there is no problem, tighten two screws (1 & 2) securely.
B
A
1 & 2
Original issue
May 2014
Page 43／64
Model
XL-420
| 43
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