
2.EXPLANATION OF OPERATION MODES FANUC AC SPINDLE MOTOR βi series B-65280EN/05
- 374 -
(3) When the external one-rotation signal (proximity switch) is used
Spindle motor with built-in M
i
sensor
(or MZ
i
sensor)
Spindle
JYA3
SVPM
(TYPE A)
JA7A
JA7B
JYA2
CNC
1st s
indle
2nd s
indle
JYA3
SVPM
(TYPE A)
JA7B
JYA2
Spindle
Spindle motor with built-in M
i
sensor
(or MZ
i
sensor)
Gear or timing belt
External one-rotation
signal switch (proximity
switch)
Gear or timing belt
External one-rotation
signal switch (proximity
switch)
NOTE
1 When using the external one-rotation signal
(proximity switch), use the detection arbitrary gear
ratio function (DMR function).
2 When using the detection arbitrary gear ratio
function (DMR function), set the following:
- Parameters (No. 4171 to No. 4174) for the
numerator/denominator of an arbitrary gear ratio
between the motor sensor and spindle
3 Set the type of the external one-rotation signal
(proximity switch) (bits 3 and 2 of No. 4004).
4 For stable detection of the one-rotation signal, detect
the one-rotation signal by performing spindle
orientation before entering spindle synchronous
control mode.
For orientation based on the external one-rotation
signal, see Section 2.2, "POSITION CODER
METHOD ORIENTATION", in Part I.