Mazak VTC-160A, Maintenance Manual, Page: 73 / 96

5-19
5-10-3 Changing the Proximity Sensor
MC111-01217
Gap: 0.3 - 0.5 mm
(0.01 - 0.02 in.)
10 mm (0.39 in.)
Washer
Bracket
Washer
Dog
Nut B
Nut A
Proximity sensor
Fig. 5-13 Changing the Proximity Sensor
< Procedure >
(1) Remove nuts A and B by using the wrenches and then remove the sensor from the bracket.
(2) Set a new sensor in the bracket.
(3) Tighten nuts A and B temporarily.
(4) Measure the gap between the sensor front edge and the dog using the thickness gauge.
(5) Adjust the gap by turning the nuts.
Gap: 0.3 to 0.5 mm (0.01 to 0.02 in.)
Since the thread pitch of the sensor is 1 mm (0.039 in.), one turn of the nut moves the sensor 1
mm (0.039 in.)
(6) Tighten nuts A and B at the same torque.
(7) After adjusting the sensor, operate the related machine unit and make sure that the sensor
operates ON/OFF correctly by observing the LED in the sensor.
Note: Tightening torque varies according to the distance from the front end of the head. Tighten
the nuts within the allowable torque indicated for range A and range B.
MC111-01153
A B
10
Allowable tightening torque in range A:
120 kgf-cm (8.7 ft-lbs)
Allowable tightening torque in range B:
200 kgf-cm (14.5 ft-lbs)
LED
Unit: mm (in.)
(0.39)
Fig. 5-14 Proximity Sensor
Return to Library