
B-65280EN/05 FANUC AC SPINDLE MOTOR αi series 2.EXPLANATION OF OPERATION MODES
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2.3.8 Parameter Setting Procedure
(1) Command arbitrary gear ratio (CMR)
(a) For a configuration in which the sensor built into the motor is used for position
detection and the gear ratio between the spindle and motor is not 1:1, as
shown in sample system configuration 2 below, the command arbitrary gear
ratio (CMR) is used.
[Sample system configuration 1]
When the position detector is connected to the spindle at a ratio of 1:1,
the command arbitrary gear ratio (CMR) function is not used.
Spindle
position coder
connected to the s
indle at a ratio of 1:1
Motor
BZ
i
sensor
(directly connected to the spindle)
Spindle +
built-in motor
[Sample system configuration 2]
When the sensor built into the motor is used as the position detector in
a configuration in which the gear ratio between the spindle and motor
is not 1:1, the command arbitrary gear ratio (CMR) function is used.
Position
control
Arbitrary gear
ratio
(command)
Position feedback
Position
command
CNC
SPM
Spindle
Motor
NOTE
This system configuration also enables the detection
arbitrary gear ratio function (DMR function) to be
used.