Siemens SINUMERIK 840D

5
04.00 Special Motion Commands
5.3 Com
p
ressor COMPON/COMPCURV
5
840 D
NCU 571
840 D
NCU 572
NCU 573
FM-NC 840Di

Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
5-161
With G code COMPON block transitions are only
constant in speed, while acceleration of the
participating axes can be in jumps at block
transitions. This can increase oscillation on the
machine.
In addition, in SW 4.4 and higher:
With G code COMPCURV, the block transitions are
with constant acceleration. This ensures smooth
velocity and acceleration of all axes at block
transitions.
Programming
COMPON/COMPCURV
Activate compressor
COMPOF
Deactivate compressor
Machine manufacturer
Three machine data are provided for the compressor
function:
•
$MC_COMPRESS_BLOCK_PATH_LIMIT
A maximum path length is set. All the
blocks along this path are suitable for
compression.
Larger blocks are not compressed.
•
$MA_COMPRESS_POS_TOL
A tolerance can be set for each axis. The
generated spline curve does not deviate by more
than this value from the programmed end points.
The higher these values are set, the more blocks
can be compressed.
•
$MC_COMPRESS_VELO_TOL
The maximum permissible path feed deviation
with active compressor can be preset in
conjunction with FLIN and FCUB.