Siemens SINUMERIK 840D sl Function Manual page 670

P2: Positioning axes
11.4 Positioning axis dynamic response
Rapid traverse override
Rapid traverse override applies only to path axes. Positioning axes have no rapid traverse
interpolation (only axial linear interpolation G01) and therefore no rapid traverse override.
Revolutional feedrate
In JOG mode the behavior of the axis/spindle also depends on the setting of SD41100
JOG_REV_IS_ACTIVE (revolutional feedrate when JOG active).
● If this setting data is active, an axis/spindle is always moved with revolutional feedrate
MD32050 $MA_JOG_REV_VELO (revolutional feedrate with JOG) or MD32040
$MA_JOG_REV_VELO_RAPID (revolutional feedrate with JOG with rapid traverse overlay)
as a function of the master spindle.
● If the setting data is not active, the behavior of the axis/spindle depends on SD43300
$SA_ASSIG_FEED_PER_REV_SOURCE (revolutional feedrate for positioning axes/
spindles)
● If the setting data is not active, the behavior of a geometry axis on which a frame with
rotation is effective depends on the channel-specific setting data SD42600
$SC_JOG_FEED_PER_REV_SOURCE. (In the operating mode JOG, revolutional feedrate
for geometry axes on which a frame with rotation is effective.)
Maximum axial acceleration
With positioning axis motions, one of the two following maximum values is effective depending
on the set positioning axis dynamic response mode:
● MD32300 $MA_MAX_AX_ACCEL [0] (maximum axial acceleration for path motions in the
dynamic response mode DYNNORM)
● MD32300 $MA_MAX_AX_ACCEL [1] (maximum axial acceleration for path motions in the
dynamic response mode DYNPOS)
The positioning axis dynamic response mode is set in the NC-specific machine data:
MD18960 $MN_POS_DYN_MODE = <mode>
<mode>
Maximum axial jerk
When traversing positioning axes with active jerk limitation, the value from one of the following
machine data takes effect as maximum axial jerk:
● MD32430 $MA_JOG_AND_POS_MAX_JERK (maximum axial jerk for positioning axis
motions)
● MD32431 $MA_MAX_AX_JERK [0] (maximum axial jerk for path motions in the dynamic
response mode DYNNORM)
● MD32431 $MA_MAX_AX_JERK [1] (maximum axial jerk for path motions in the dynamic
response mode DYNPOS)
670
Meaning
0 Effective maximum axial acceleration: MD32300 $MA_MAX_AX_ACCEL[ 0 ]
1 Effective maximum axial acceleration: MD32300 $MA_MAX_AX_ACCEL[ 1 ]
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions