
2.EXPLANATION OF OPERATION MODES FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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15i 16i 30i
3083 4083 4083
Motor voltage setting on velocity control mode
3136 4136 4136
Motor voltage setting on velocity control mode (for low-speed characteristics)
Unit of data : 1%
Valid data range : 0 to 100
Standard setting : Depends on the motor model.
This parameter sets the motor voltage under the no-load condition in
velocity control mode.
The motor voltage to be set depends the motor model, the most usual
setting is 30.
If an abrupt application of a heavy load in the no-load condition
lowers the motor speed, adjust this parameter to around 50 to 70 to
improve the torque response characteristic.
Note that, however, setting a large value causes heating and large
activation sound during no-load motor operation.
15i 16i 30i
3171 4171 4171
Denominator of an arbitrary gear ratio between the motor sensor and spindle
(HIGH) CTH1A=0
3172 4172 4172
Numerator of an arbitrary gear ratio between the motor sensor and spindle
(HIGH) CTH1A=0
3173 4173 4173
Denominator of an arbitrary gear ratio between the motor sensor and spindle
(LOW) CTH1A=1
3174 4174 4174
Numerator of an arbitrary gear ratio between the motor sensor and spindle
(LOW) CTH1A=1
Unit of data :
Valid data range : 0 to 32767
Standard setting value : 0
These parameters set conversion coefficients (numerator,
denominator) for using the detection arbitrary gear ratio function
(DMR function) by multiplying a motor sensor (Mi sensor) feedback
signal by a gear ratio to produce a spindle position feedback signal.
When the spindle rotates Q times while the motor shaft rotates P times
(there is no common divisor other than 1 for P and Q), the settings are:
No. 4171 (No. 4173 when CTH1A = 1) = P
No. 4172 (No. 4173 when CTH1A = 1) = Q
When 0 is set in any of these parameters, the setting of 1 is assumed.
NOTE
1 When performing feed per revolution with the
detection arbitrary gear ratio function (DMR
function), set an arbitrary gear ratio between the
motor sensor and spindle in this parameter.
2 Threading using the detection arbitrary gear ratio
function (DMR function) is not supported.