904 HEIDENHAIN Technical Manual MANUALplus 620
Acceleration
feedforward control
for analog axes
MP_accForwardFactor allows you to influence acceleration feedforward
control for analog axes.
The following error (servo lag) should be as small as possible during the
acceleration phase. The MP_accForwardFactor parameter directly affects
the following error.
The best method for ascertaining the appropriate value for the parameter is by
carefully approaching the ideal value. Proceed as follows:
Enter 0.005 as the preliminary starting value in the parameter
MP_accForwardFactor.
Press the axis-direction key and record the following error with the
integrated oscilloscope.
Ascertain the correct setting by carefully increasing the preliminary starting
value; i.e. use the value 0.01 for the next measurement.
Determine the value just before an undershoot forms with the measured
following error.
MP_accForwardFactor not adjusted
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