Machining Free Form Surfaces Using Advanced Surface - Siemens SINUMERIK 828D Commissioning Manual

4.3

Machining free form surfaces using Advanced Surface

Machining with Advanced Surface
When executing CAM programs in the high-speed cutting (HSC) range, the control has to
process high feedrates with the shortest NC blocks. The result should be a good surface quality
of the workpiece with high precision in the µm range at extremely high machining feedrates of
> 10 m/min.
Using CYCLE832, the NC program is very precisely harmonized across the various machining
strategies:
● When roughing, using smoothing of the contour, the emphasis is on speed.
● When finishing, the emphasis is on accuracy.
In both cases, specifying a tolerance ensures that the machining contour is maintained in order
to achieve the desired surface quality.
Checking the settings for Advanced Surface
After installation of the 828D Toolbox, several check programs of the MDC3AXV ... .SPF type
are contained in the \Examples\AS_checkprograms directory.
The readme.txt file also contains further information in order to test the recommended machine
data settings for Advanced Surface with the programs. When the program is started, a
MDADVS.SPF file will be created in the SPF.DIR directory in which the test results are output
as a list.
Example:
(extract from the complete file)
Machine Data setting different to required Advanced Surface Setting
Machine Data setting different to recommended Advanced Surface
Setting
N20470 $MC_CPREC_WITH_FFW=1, recommended: 3
N20485 $MC_COMPRESS_SMOOTH_FACTOR[2]=0, recommended: 0.0001
N20485 $MC_COMPRESS_SMOOTH_FACTOR[3]=0, recommended: 0.0001
N20485 $MC_COMPRESS_SMOOTH_FACTOR[4]=0, recommended: 0.0001
N20486 $MC_COMPRESS_SPLINE_DEGREE[2]=3, recommended: 5
N20486 $MC_COMPRESS_SPLINE_DEGREE[3]=3, recommended: 5
N20486 $MC_COMPRESS_SPLINE_DEGREE[4]=3, recommended: 5
N20487 $MC_COMPRESS_SMOOTH_FACTOR_2[2]=0, recommended: 0.5
N20487 $MC_COMPRESS_SMOOTH_FACTOR_2[3]=0, recommended: 0.5
N20487 $MC_COMPRESS_SMOOTH_FACTOR_2[4]=0, recommended: 0.5
CNC commissioning
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
4.3 Machining free form surfaces using Advanced Surface
Parameterizing machine data
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