
4. SERVO FUNCTION DETAILS B-65150E/04
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<5> Make adjustments on the POA1 observer parameter.
Run the servo motor at a rapid traverse rate (abut 1000 rpm)
linearly back and forth, and observe the motor velocity and
estimated disturbance value.
The waveforms observed before adjustment has either of the
trends shown below:
Make adjustments on the POA1 parameter so that neither an
overshoot nor an undershoot will not be observed on the estimated
disturbance value at acceleration/deceleration. After adjustment,
the waveforms shown below should be obtained.
(A clear waveform like the one shown below may not be obtained
in some machines. In such machines, find the POA1 value that
can minimize the overshoot and undershoot by watching the
estimated disturbance waveform at acceleration/deceleration.)
1859
−
Observer parameter (POA1)
2047 1047
Insufficient POA1 value
At acceleration: Undershoot on estimated
disturbance value
At deceleration: Overshoot on
estimated
disturbance
value
Excessive POA1 value
At acceleration: Overshoot on estimated
disturbance value
At deceleration: Undershoot on
value
Proper POA1
Motor velocity
Estimated
disturbance
value
Motor velocity
Estimated disturbance value