Axis-Error Compensation; Backlash Compensation; Cause Outside Of The Control Loop - HEIDENHAIN iTNC 530 HSCI Technical Manual

6.4 Axis-error compensation

6.4.1 Backlash compensation

Cause outside of
the control loop
July 2013
The iTNC can compensate the following mechanical axis errors:
Backlash

Linear axis errors

Nonlinear axis errors

Thermal expansion

Reversal spikes during circular movements

Friction, stick-slip

Torsion compensation

Per axis you can activate either the linear or the nonlinear axis error
compensation. All other types of compensation are nonexclusive.
During a reversal in axis direction, there is often a little play between the rotary
encoder and table. This play is referred to as backlash.
Positive backlash: The rotary encoder reading is ahead of the table. The table
traverse is too short.
Negative backlash: The rotary encoder reading is behind the table. The table
traverse is too long.
6.4 Axis-error compensation
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