Siemens SINUMERIK 808D ADVANCED Operating Instructions Manual page 134

Machine data
2.3 Channel-specific machine data
4xx:
constant, if possible, as long as the dynamic response of the axes permits
this. Differing from the default setting, with this setting, the smoothing
blocks are also interpolated as a path.
Possible values for the thousands digit (configuration of G644):
0xxx:
When smoothing with G644, the maximum deviations of each axis specified in MD
COMPRESS_POS_TOL are adhered to. If the dynamic response of the axis allows,
the specified tolerance might not be fully utilized.
1xxx:
When smoothing with G644, the smoothing distance is specified.
2xxx:
When smoothing with G644, the maximum frequency at which the smoothing move-
ment of each axis occurs is limited. The maximum frequency is specified in
MD32440 $MA_LOOKAH_FREQUENCY.
3xxx:
When smoothing with G644, neither the toleran ce nor the smoothing distance is
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 are observed. With BRISK, the jerk is not limited; instead,
each axis traverses with the maximum possible acceleration.
4xxx:
When smoothing with G644, the maximum deviations of each axis specified in MD
COMPRESS_POS_TOL are adhered to. In contrast to the value 0xxx, the specified
tolerance is fully utilized where possible. The axis then does not reach its
maximum possible dynamic response.
5xxx:
When smoothing with G644, the smoothing distance is specified (ADIS or ADIS-
POS). In contrast to the value 1xxx, the specifie d smoothing distance is also
fully utilized where possible. The axes involved then might not reach their
maximum dynamic response.
Possible values for the ten-thousands digit (configuration of G644) or G645):
0xxxx:
The velocity profiles of the axes in the smoothing range are defined without
jerk limitiation when BRISK is active, and with jerk limitation when SOFT is
active.
1xxxx:
The velocity profiles of the axes in the smoothing range are always defined
with jerk limitation no matter whether BRISK or SOFT is active.
2xxxx: When smoothing tangential block transitions with G645, "counter
motion" may occur when moving along the contour. This can be avoided if cir-
cles are involved. If this function is activated, the circles involved are
reduced by the set tolerance. As a consequence, the smoothed contour runs on
the inner side of the tolerance band and "counter motion" is avoided.
The values of the units, tens, hundreds and thousands digits are added.
Corresponds with:
MD33100 $MA_COMPRESS_POS_TOL,
SD42465 $SC_SMOOTH_CONTUR_TOL,
SD42466 $SC_SMOOTH_ORI_TOL
134
The "effective" path velocity in a smoothing block will remain
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Parameter Manual