Nominal Position Value Filter; Single And Double Filters; Hsc Filter And Advanced Hsc Filter - HEIDENHAIN iTNC 530 HSCI Technical Manual

Nominal position
value filter
July 2013
To attain a high machining velocity, the workpiece contour can be adapted to
the machine dynamics by means of a nominal position value filter.
4 low-pass filters are available for limiting the bandwidth of the dynamics of
nominal position and speed values.
Single filter

Double filter

HSC filters

• With Cycle 32 – mode 0 (HSC finishing filter)
• With Cycle 32 – mode 1 (HSC roughing filter)
Advanced HSC filters

• With Cycle 32 – mode 0 (HSC finishing filter)
• With Cycle 32 – mode 1 (HSC roughing filter)

Single and double filters

Single and double filters are classic low-pass filters that always smooth a
contour towards the inside at changes in direction. They can be used when a
very high surface quality is required, or when a high machining speed is
required and larger tolerances are permitted.
Compared to the double filter, the single filter permits a higher machining
speed with a surface quality that is almost always comparable.
Depending on the cycle time, tolerance and axis-jerk limit values, the control
automatically increases the filter frequency actually used (previously: filter
order).

HSC filter and advanced HSC filter

The speed advantage of both HSC filters is especially large for circular
contours. However, you must consider slight overshoots at corners and
curvature transitions that are within the given tolerances (MP1202.x or Cycle
32). In general it is recommended that the advanced HSC filter be applied first.
It has a more even effect on the speed and any possible overshoots.
6.8 The control loop
821