HEIDENHAIN iTNC 530 (340 49x-05) Cycle programming - Manual (Page 459)

HEIDENHAIN iTNC 530 459
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8
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TICS (Cy
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451, DIN/ISO: G451; option)
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
activates internal backlash compensation of 1 degree 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 <
1 mm, the TNC does not calculate the backlash. The larger
the measuring circle radius, the more accurately the TNC
can determine the backlash (See also “Log function” on
page 464).