Siemens SINUMERIK 840D sl Function Manual page 229

Note
Corner limit angle and compressor function COMPCAD
The corner limit angle for COMPCAD set via the setting data SD42470
$SC_CRIT_SPLINE_ANGLE is only used as an approximate measure for corner detection.
By evaluating the plausibility, the compressor can also identify flatter block transitions as
corners and larger angles as outliers.
Recommended settings
The following machine data has an effect on the compressor functions. We recommend setting
the following values:
Number
MD18360
MD20490
MD28520
MD28530
MD28540
MD28060
MD28070
MD32310
Programming
Syntax
COMPON
COMPCURV
COMPCAD
COMPOF
Meaning
COMPON:
COMPCURV:
COMPCAD:
COMPOF :
See also
Tolerance and compression of G0 blocks (Page 235)
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Identifier
$MN_MM_EXT_PROG_BUFFER_SIZE
$MC_IGNORE_OVL_FACTOR_FOR_ADIS
$MC_MM_MAX_AXISPOLY_PER_BLOCK
$MC_MM_PATH_VELO_SEGMENTS
$MC_MM_ARCLENGTH_SEGMENTS
$MC_MM_IPO_BUFFER_SIZE
$MC_MM_NUM_BLOCKS_IN_PREP
$MA_MAX_ACCEL_OVL_FACTOR
Activating the compressor function COMPON
Effective: Modal
Activating the compressor function COMPCURV
Effective: Modal
Activating the compressor function COMPCAD
Effective: Modal
Deactivating the currently active compressor function.
B1: Continuous-path mode, Exact stop, Look Ahead
4.5 Compressor functions
Recommended
value
100
1
3
5
10
100
60
<Value for G64
operation>
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