
2.EXPLANATION OF OPERATION MODES FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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NOTE
When the maximum speed on Cs contouring control
(in terms of motor shaft) is higher than the base
speed of the spindle motor, set a value less than
100 in this parameter according to the following
expression:
Spindle motor base speed
Maximum speed in Cs contouring control
(in terms of motor shaft)
Motor voltage (%)=100×
In this case, also set bit 4 of No. 4016 to 1 as the
setting of control characteristics on Cs contouring
control.
15i 16i 30i
3092 4092 4092
The reduction rate of position loop gain in returning to the reference position
on Cs contouring mode
Unit of data : 1%
Valid data range : 0 to 100
Standard setting : 100
This parameter specifies a rate of change in the position gain used for
reference position return on Cs contouring control mode.
NOTE
An overshoot can occur at reference position return
time for a cause such as an excessively high
reference position return speed and an excessively
large spindle inertia. In this case, an overshoot can
be avoided by setting a small value in this
parameter.
15i 16i 30i
3094 4094 4094
The constant of the torque disturbance compensating (Acceleration feedback
gain)
Unit of data :
Valid data range : 0 to 32767
Standard setting : 0
This parameter specifies the constant for compensating for a
disturbance torque on Cs contouring control mode.
NOTE
By setting this parameter, stability in cutting can be
improved.
In this parameter, set a value from 500 to 2000.
Do not set a value exceeding 4000.