Overview

Task

Filters are used to influence the signal profile.

Depending on the required effect, the filters can be defined as low-pass, high-pass, band-pass or band-stop and all-pass filters. Depending on the filter type, the following is possible:

• Smooth signal curve
• Limit bandwidth
• Suppress noise
• Select frequency bands
• Attenuate frequency bands
• Compensate dead times

The filters are also used to reduce resonance phenomena.

The filters act on the values for the absolute position setpoint that were calculated by path interpolation.

Characteristics

Filters can be classified according to their characteristic transmission behaviour and their purpose. Filter types with different characteristics can be used for control. A distinction is made between standard and HSC filters. Filter prototypes 1-4 are standard filter types and filter prototype 5 describes HSC filters.

The parameter-definable filters are effective with:

• Linear axes
• Rotary axes without modulo calculation, i.e. those that have a limited motion range (see P-AXIS-00015)
• Rotary axes with modulo handling, i.e. rotating endlessly
• Spindles (as of CNC Version V3.00). Only standard filters are available for spindles;HSC filters cannot be used.

Parametrisation and programming

Filter settings are configured and adapted in the axis lists. Standard filters are also activated in the axis lists. HSC filters are only preconfigured in the axis lists; they are activated by an NC command.