Siemens SINUMERIK 828D Function Manual page 167

Parameter assignment
Rounding behavior with G644 is configured via the thousands and tens of thousands places in the machine data:
MD20480 $MC_SMOOTHING_MODE (rounding behavior with G64x)
Value
Thousand's place:
0xxx: When rounding with G644, the maximum deviations for each axis specified by the
following machine data are respected:
MD33100 $MA_COMPRESS_POS_TOL
If the dynamics of the axis permit, then any specified tolerance is not utilized.
1xxx: Input the maximum rounding path by programming ADIS=... or ADISPOS=... (as for G641).
2xxx: Input the maximum possible frequencies of each axis in the rounding area using the
machine data:
MD32440 $MA_LOOKAH_FREQUENCY (smoothing frequency for Look Ahead)
The rounding area is defined so that no frequencies in excess of the specified maximum
can occur while the rounding motion is in progress.
3xxx: Any axis that has a velocity jump at a corner traverses around the corner with the
maximum possible dynamic response (maximum acceleration and maximum jerk).
SOFT:
If SOFT is active, the maximum acceleration and the maximum jerk of each axis is
maintained.
BRISK:
If BRISK is active, only the maximum acceleration and not the maximum jerk of each axis
is maintained.
With this setting, neither the maximum deviations nor the rounding distance are checked.
The resulting deviations or rounding distances are determined exclusively by the dynamic
limits of the respective axis and the current path velocity.
4xxx: As in case of 0xxx, the maximum deviations of each axis specified with the following
machine data are used:
MD33100 $MA_COMPRESS_POS_TOL
Contrary to 0xxx, the specified tolerance is also utilized, if possible. Therefore, the axis
does not attain its maximum possible dynamics.
5xxx: As in case of 1xxx, the maximum possible rounding path is specified through programming
of ADIS=... or ADISPOS= respectively.
Contrary to 1xxx, the specified rounding path is also utilized, if possible. Therefore, the
axes involved do not attain their maximum possible dynamics.
Ten thousands digit
0xxxx The velocity profiles of the axes in the rounding area are determined without jerk limiting
for BRISK and with jerk limiting for SOFT.
1xxxx The velocity profiles of the axes in the rounding area are always determined with jerk
limiting, regardless of whether BRISK or SOFT is active.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
B1: Continuous­path Mode, Exact Stop, LookAhead
Description
3.3 Continuous-path mode
167