December 2001 Axis Error Compensation 6 – 37
Cause within the
control loop
If axis movement is measured with a linear encoder, the TNC can compensate
the play between the motor and the table. At the same time, the reversal
spikes during circular movements are compensated: machine parameters
MP711 to MP716 for “Compensation of reversal spikes” are not necessary.
Compensation:
7
77
7 In MP750, enter the reversal error in mm.
7
77
7 In MP752, enter the time in which the distance to be compensated should
be traversed.
MP750.0-8 Backlash in axes 1 to 9
Input: -1.0000 to +1.0000 [mm] or [°]
MP752.0-8 Compensation time for backlash in axes 1 to 9
Input: 0 to 1000 [ms]
Example:
MP750: 0.03 mm
MP752: 15 ms
For every change in direction, a nominal speed command signal is output for
15 ms, which corresponds to a feed rate of 120 mm/min:
Note
Available as of NC software 280 470-08 and 280 472-01!
0.03 mm
15 ms
------------------------
120 mm/min
=
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