ID 70420

Characteristic filter frequency greater than half the sampling rate.

Description

According to Shannon's sampling theorem, the maximum cut-off frequency is (½*TA= cycle time of the NC controller). The cut-off frequency of the PT2 filter is calculated from the time constant to obtain fg = 1 / (2 * PI * P-AXIS-00438).

Response

Class

7

The filter is deactivated.

Solution

Class

6

Possible solutions:

  • Increase time constant P-AXIS-00438 of PT2 filter
  • Reduce the cycle time of the numerical control

Parameter

%1:

Logical axis number [-]

Logical axis number P-AXIS-00016 of concerned axis

%2:

Current value [-]

Number of concerned filter

%3:

Current value [-]

Type of filter (see axis filter FCT-A7)

%4:

Error value [Hz]

Actual cut-off frequency of the filter

%5:

Current value[-]

Sampler frequency of the NC (1 / TA)

Error type

-