
4.ADJUSTMENT FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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(6) Adjustment procedure
After completing the preparation for adjustment mentioned previously,
follow the steps below to adjust parameter settings in the MDI mode.
NOTE
Note that the αi series does not have the adjustment
function using the spindle check board.
<1> Rotation in the velocity control mode
Set all the amplitude ratio and phase difference compensation
parameters to 0, and rotate the spindle (motor) in the previously
mentioned direction and at speed N in the velocity control mode.
<2> Setting and adjusting the check board and oscilloscope
After disabling the averaging function of the oscilloscope, adjust
the settings regarding the shift amount and the presence/absence
of an offset for CH1, and the display setting of the oscilloscope
so that incremental data does not overflow the check board
output range (±5 V) and oscilloscope display range (see Fig.
4.3.1).
After completing the adjustment of the check board and
oscilloscope, enable the averaging function (See Fig. 4.3.2).
CH1:(313.4.0.1)
Feedback increment
0.5V/div
CH2:(231.8.0.0)
Feedback data
5V/div
Time range:5ms/div
Without averaging
Fig.4.3.1 Without averaging
CH1:(313.4.0.1)
Feedback increment
0.5V/div
CH2:(231.8.0.0)
Feedback data
5V/div
Time range:5ms/div
32 averaging times
1.05V
Fig. 4.3.2 When averaging is performed 32 times
* Sensor: 256 λ/rev, speed 18 min
-1
<3> Adjusting the phase difference compensation parameter
Set the parameter for amplitude ratio compensation (parameter
No. 4355 or 4357) to 0, and adjust the phase difference