HEIDENHAIN iTNC 530 HSCI Technical Manual page 869

July 2013
If PDT feedforward or the increase of the current controller factors is
1
activated, you must keep in mind that the noise in the current increases when
the bandwidth is increased. You have to find a compromise between the
increase of the current controller bandwidth and

the development of noise in the drive.

To adjust the increased current controller factors, proceed as follows:
To activate the function, enter MP2450 = 1 for the corresponding parameter

of the axis.
Readjust the current controller with TNCopt (Bode diagram function; see

TNCopt User's Manual).
Note
If you activate the PDT
MP2440, it is not necessary to readjust the current controller. The PDT
feedforward does not have a noticeable effect on the current control loop
but rather only on the superimposed speed control loop. For axes with
rigidly connected mechanics, you attain higher controller factors in the
speed control loop if the PDT
MP2440.x Cutoff frequency of the feedforward current controller
Input: 0.1 to 5000.0 [Hz]
0: Feedforward control not active
MP2450.x Dead-time compensation
Input: 0: Not active
1: Active
6.8 The control loop
feedforward by entering a value in parameter
1
feedforward is activated.
1
1
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