Interpolation Filter Time

It is the filter time constant for the fine interpolation filter in seconds. This MC does not directly influence the position regulation but the fine interpolation, with the help of which new position nominal values are calculated in the fine interpolation grid (MK CFG Fine Interpolation Divider). The fine interpolation filter is a 2nd order filter, with which the calculated position nominal values can be smoothed, in order to achieve a more gentle movement characteristic for certain axes. This MC also affects axes with digital interfaces.

The fine interpolation filter causes a time delay in the output of the position nominal values, which is approx. twice as large as the filter time constant. Therefore, the same time constants should always be entered for axes which are jointly affected by a path interpolation.

The default value for this MC is set to 0 and should only be increased if an axis tends to oscillate in the case of discontinuity of the path; e.g. at transitions between one circle radius and another. This is usually the case for axes with a large reverse play and for toothed racks. Reasonable values are in the range 0 to 0.2s. The larger the set value, the larger the path deviation caused by the filter.