HEIDENHAIN iTNC 530 (340 49x-04) Touch Probe Cycles - Manual (Page 168)

168 4 Touch Probe Cycles for Automatic Kinematic Measurement
4.1 Kinematic Measur
ement with TS
T
ouc
h Pr
obes (Option KinematicsOpt)
Backlash
Backlash is a small amount of play between the rotary or angle
encoder and the table that occurs when the traverse direction is
reversed. If the rotary axes have backlash outside of the control loop
it can result in significant error during tilting. The cycle automatically
activated the internal backlash compensation in digital rotary axes
without separate position measurement input.
In the Check mode, the TNC runs the measurement series for each
axis to be able to reach the measuring positions from both directions.
The TNC documents the arithmetic mean of absolute values of the
measured rotary axis backlash.
For reasons of accuracy, if the measuring circle radius is
< 100 mm, the TNC does not calculate the backlash. The
larger the measuring circle radius, the more accurately the
TNC can determine the backlash.