Siemens Sinumerik 840D sl Programming Manual page 302

Path action
12.2 Continuous-path mode (G64, G641, G642, G643, G644, G645, ADIS, ADISPOS)
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 G643.
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 G645, the smoothing motion is defined so that the acceleration of all axes involved
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 G642.
302
Meaning
Specification of maximum axial deviations with:
MD33100 $MA_COMPRESS_POS_TOL
Specification of maximum rounding clearance by programming:
ADIS=... or 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 G644, neither the tolerance nor the rounding distance are monitored.
Each axis traverses around a corner with the maximum possible dynamic response.
With SOFT, both the maximum acceleration and the maximum jerk of each axis is maintained.
With the BRISK command, the jerk is not limited; instead, each axis travels at the maximum
possible acceleration.
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals