NEC FD1165 - Removing the Replacing the Optical; Tachometer Sensor; Figure

c. Slide the sensor out of the base frame, being care-
ful not to damage the encoder (see Figure 4-10).
d. Remove the heat-shrinkable tubing from the sensor
connections and unsolder the wires.
Use the following procedure to replace the optical tachom-
eter sensor.
a. Reverse the removal procedure; do not tighten the
screw.
b. Slide the sensor into the channel in the base frame
until the gap between the spindle and the sensor is
• 008 to .040 inches (0 It 2 to 1.0 rom) (see Figure
4-10) •
c. Replace the collet assembly.
d. Tighten the screw.
OPTICAL
TACHOMETER
SENSOR·
SLIDE THE SENSOR IN THIS DIRECTION
BEFORE
REMOVING IT
I
I
APPROXIMATELY
0.2 in. (0.5 mm)
Figure 4-10 Removing and Replacing the Optical
Tachometer Sensor
4.4.7 Sensor Cable Assembly (LED Assembly and Index Sensor)
Removal and Replacement
The LED assembly and index sensors are replaced as a sensor
cable assembly.
Use the following procedure to replace the sensor cable
assembly.
a. Remove the lever plate by removing the four screws
that fasten it to the two lever hinges (see Figure
4-11.
4-11