Smoothing Of The Orientation Characteristic; Function; Commissioning - Siemens SINUMERIK 840DE sl Function Manual

F2: Multi-axis transformations
3.9 Orientation
Further information
Function Manual Basic Functions; Continuous-path mode, exact stop, LookAhead >
Compressor functions
3.9.4

Smoothing of the orientation characteristic

3.9.4.1

Function

With many of the NC programs for 5-axis machining created with CAD/CAM systems it
happens that although the contour characteristic is sufficiently smooth in accordance with the
underlying geometry the orientation characteristic contains fluctuations it to one extent or the
other. These fluctuations in orientation result in very unsmooth running of the orientation axes
with permanent acceleration and braking. The compensating motion that the linear axes then
have to carry out requires that they also have to be continually accelerated and braked. Due to
this unnecessary acceleration, the possible path velocity is significantly limited and
consequently the machining time unnecessarily lengthened.
The "Smoothing the orientation characteristic" function can be used to smooth oscillations
affecting orientation over several blocks. The aim is to achieve a smooth characteristic for both
the orientation and the contour.
Preconditions
The following preconditions apply when using the function:
● The function is only available in systems with 5/6-axis transformation.
● It can only be used in conjunction with the COMPCAD compressor function.
3.9.4.2

Commissioning

Parameterization
Number of blocks
Smoothing of the orientation characteristic is carried out by means of an adjustable number of
blocks:
MD28590 $MC_MM_ORISON_BLOCKS = <value>
For most applications, 10 blocks should be sufficient. The minimum value that should be
entered is 4.
Note
If smoothing of the orientation characteristic is activated without sufficient block memory having
been configured for it (MD28590 < 4), an alarm message will be output and the function cannot
be executed.
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Function Manual, 06/2019, A5E47435470B AA
Transformations