Siemens SINUMERIK 802S Start-Up page 93

Note
If MD 32900 DYN_MATCH_ENABLE has been set to "1" for the drilling axis, it should also be
set to "1" for all interpolating axes. This increases the traversing accuracy along the contour.
However, the entries for these axes in MD 32910 DYN_MATCH_TIME [n] must be left at the
value "0".
Backlash compensation
Overview
The falsification of the axis travel due to mechanical backlash can be compensated (cf. Tech-
nical Manual "Description of Functions").
Function
The axis–specific actual value is corrected by the backlash compensation value (MD32450
BACKLASH) each time the traversing direction changes.
Activation
The backlash compensation is active in all operating modes only after referencing.
Note
Which step size is added to the backlash compensation value is determined by MD36500
ENC_CHANGE_TOL.
Leadscrew error compensation(LEC)
Overview
The compensation values are determined using the measured error characteristic and are
entered in the control system using special system variables during start-up. The compensa-
tion tables (cf. Technical Manual "Description of Functions") must be created in the form of NC
programs.
Function
With the leadscrew error compensation (LEC), the axis-specific actual position value is correc-
ted by the appropriate compensation value.
If the compensation values are too large, it is possible that alarm message are output (e.g.
contour monitoring, speed setpoint limitation).
SINUMERIK 802S
6FC5 597–2AA00–0BP2 (01.02)
Start-Up
4.7 Commissioning
4-93