
2.EXPLANATION OF OPERATION MODES FANUC AC SPINDLE MOTOR αi series B-65280EN/05
- 54 -
(6) When the external one-rotation signal (proximity switch) is used
Spindle motor with built-in M
i
sensor
(or MZ
i
sensor)
Spindle
Gear or timing belt
External one-rotation
signal switch (proximity
switch)
NOTE
1 For stable detection of the one-rotation signal, fix the
rotation direction (bits 3 and 2 of No. 4003) for
orientation at one direction.
2 Set the type (bits 3 and 2 of No. 4004) of the
external one-rotation signal (proximity switch).
3 For stable detection of the one-rotation signal, set an
orientation speed (No. 4038) from 50 to 100 min
-1
according to the specification of the external
one-rotation signal (proximity switch).
4 The detection of the one-rotation signal starts after
the orientation speed is reached.
5 Set the parameters (No. 4171 to No. 4174) for the
numerator/denominator of an arbitrary gear ratio
between the motor sensor and spindle.
2.2.5 Stop Position Specification Method
Stop position
specification method
Description
Parameter-based
specification
Set the number of pulses (
±4095 pulses) from the
one-rotation signal to a stop position (360
° = 4096
pulses).
External setting for stop
position specification
Specify the number of pulses (0 to 4095 pulses)
from the one-rotation signal to a stop position with
a PMC signal (360° = 4096 pulses). The sum of
the number of pulses set in the parameter and the
number of pulses specified with a PMC signal
represents a final stop position.