HEIDENHAIN TNC 430 PA/M - Axis Error Compensation; Backlash Compensation; Cause Outside of the Control Loop

6 – 36 HEIDENHAIN Technical Manual TNC 426, TNC 430
6.4 Axis Error Compensation
The TNC can compensate the following mechanical axis errors:
n Backlash
n Linear axis errors
n Nonlinear axis errors
n Thermal expansion
n Reversal spikes during circular movements
n Stiction
Per axis you can activate either the linear or the nonlinear axis error
compensation. All other types of compensation are nonexclusive.
6.4.1 Backlash Compensation
Cause outside of
the control loop
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.
Compensation:
7
77
7 In MP710, enter the value that the TNC should add to or subtract from the
encoder signal after a reversal in direction.
MP710.1-8 Backlash compensation for axes 1 to 9
Input: -1.0000 to +1.0000 [mm] or [°]