
5.FUNCTION DESCRIPTIONS FANUC AC SPINDLE MOTOR βi series B-65280EN/05
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[Sample system configuration 2]
Spindle motor with built-in MZ
i
sensor
Spindle
JYA2
SVPM
(TYPE A)
Directly connected or connected with a gear or timing
belt at a ratio of 1:1
(3) When the external one-rotation signal (proximity switch) is used
[Sample system configuration]
Spindle motor with built-in M
i
sensor
(or MZ
i
sensor)
Spindle
Gear or timing belt
External one-rotation
signal (proximity switch)
JYA3
JYA2
SVPM
(TYPE A)
NOTE
1 To detect the one-rotation signal securely, fix the
direction (bits 3 and 2 of parameter No. 4003) in
which the spindle rotates during spindle orientation
to one direction.
2 Specify the type (bits 3 and 2 of parameter No.
4004) of an external one-rotation signal (proximity
switch).
3 To detect the one-rotation signal securely, set the
spindle orientation speed (parameter No. 4038) to a
value between 50 and 100 min
-1
according to the
specification of the external one-rotation signal
(proximity switch).
4 A sequence for detecting the one-rotation signal is
started after the orientation speed has been
reached.
5 Specify the denominator/numerator parameters
(Nos. 4171 to 4174) of an arbitrary gear ratio
between the motor sensor and spindle.