DIGIVEX Little Drive Servoamplifier
68
PVD 3530 GB 01/2005
There are three possibilities :
Non oscillating response
A response must be obtained without overshooting and oscillation. For example, increase gain
until oscillations gradually appear, then reduce it by 20 to 30%.
If the maximum value shown in the table is reached with P gain, without reducing the filtering
frequency, then:
Stop increasing P
Reduce the filtering frequency until the limit of oscillation
Filtering frequency setting
Oscillations may appear on the response obtained above (even when speed is increasing).
Response
with
pseudo-oscillation
This gives frequency resonance (probably mechanical origin) fr = 1/T, greater than 100 Hz.
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