11-4
11-3) ADJUSTING UPPER THREAD HOLDER
①
Adjusting Sensor Adjustment Rings
Make the following adjustments if you find errors in the wiper return system.
ⓐ
Open the cover of the wiper motor. Of the two sensor adjustment rings, align the center of the sensor screw in
the rear ring with the #1 carve point on the fixed block on the cam shaft. Align the center of the sensor screw
in the front ring with the #2 carve point on the fixed block on the shaft.
ⓑ
Adjust so the wiper return sensor is 1-1.2mm from the upper head of the sensor screw. Make sure to check if
the wiper return sensor turns on.
②
If the wiper does not move well, unscrew the driver link and adjust the wiper lever up and down. Unfasten the
bracket screw so there is lesser overload from upper thread holder bracket. Adjust and fasten the bracket back at
the point where the wiper moves well.
③
After adjustment, run the color change to check if the wiper functions well at each needle bar.
Driver link
Bracket screw
Upper thread holder bracket
[Fig.11-7]
[Fig.11-8]
Wiper return sensor
Sensor screw (rear)
Sensor screw (front)
#2 carve point
Fixed block on the cam shaft
Sensor adjustment ring
#1 carve point