Siemens SINUMERIK 828D Programming Manual page 348

Path action
11.2 Continuous-path mode (G64, G641, G642, G643, G644, G645, ADIS, ADISPOS)
Smoothing with contour and orientation tolerance with G642/G643
MD20480 $MC_SMOOTHING_MODE can be used to configure rounding with
so that instead of the axis-specific tolerances, a contour tolerance and an orientation
tolerance can be applied.
The contour tolerance and orientation tolerance are set in the channel-specific setting data:
SD42465 $SC_SMOOTH_CONTUR_TOL (maximum contour deviation)
SD42466 $SC_SMOOTH_ORI_TOL (maximum angular deviation of the tool orientation)
The setting data can be programmed in the NC program; this means that it can be specified
differently for each block transition. Very different specifications for the contour tolerance and
the tolerance of the tool orientation can only take effect with
Note
Expansion to include contour and orientation tolerance is only supported on systems
featuring the "Polynomial interpolation" option.
Note
An orientation transformation must be active for smoothing within the orientation tolerance.
Corner rounding with greatest possible dynamic response in G644
Smoothing with maximum possible dynamic response is configured in the thousands place
with MD20480 $MC_SMOOTHING_MODE.
Value
0
1
2
3
Smoothing of tangential block transitions with G645
With
remains smooth (no jumps) and the parameterized maximum deviations from the original
contour (MD33120 $MA_PATH_TRANS_POS_TOL) are not exceeded.
In the case of angular non-tangential block transitions, the smoothing behavior is the same
as with
348
Meaning
Specification of maximum axial deviations with:
MD33100 $MA_COMPRESS_POS_TOL
Specification of maximum rounding clearance by programming:
or
ADIS=... ADISPOS=...
Specification of the maximum possible frequencies of each axis occurring in the rounding
area with:
MD32440 $MA_LOOKAH_FREQUENCY
The rounding area is defined such that no frequencies in excess of the specified maximum
can occur while the rounding motion is in progress.
When rounding with
Each axis traverses around a corner with the maximum possible dynamic response.
With , both the maximum acceleration and the maximum jerk of each axis is
SOFT
maintained.
With the command, the jerk is not limited; instead, each axis travels at the maximum
BRISK
possible acceleration.
, the smoothing movement is defined so that the acceleration of all axes involved
G645
.
G642
, neither the tolerance nor the rounding distance are monitored.
G644
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
G642
.
G643
Fundamentals
and
G643