Siemens SINUMERIK 840D Function Manual page 642

H1: Manual traversing
17.3 Parameter assignment (general)
Note
When a transformation is active, MD32300 $MA_MAX_AX_ACCEL determines the maximum
possible axis-specific acceleration.
Maximum jerk when manually traversing geometry axes
The maximum jerk when manually traversing geometry axes in the SOFT acceleration mode
(acceleration with jerk limitation) can be specified for each channel via the machine data:
MD21168 $MC_JOG_JERK_GEO [<geometry axis>]
With <geometry axis> = 0, 1, 2
Note
MD21168 $MC_JOG_JERK_GEO acts only when the axis-specific jerk limitation in JOG mode
has been enabled for the base machine axes:
MD32420 $MA_JOG_AND_POS_JERK_ENABLE [<axis>] == TRUE
With MD21168 = 0, instead of the channel-specific jerk limitation, the axis-specific limit value
from MD32430 $MA_JOG_AND_POS_MAX_JERK is effective.
Maximum jerk when manually traversing orientation axes
The maximum jerk when manually traversing orientation axes can be specified for each
channel via the machine data:
MD21158 $MC_JOG_JERK_ORI [<orientation axis>]
For MD21158 to take effect, the channel-specific jerk limitation for the manual traversing of
orientation axes must be enabled via the following machine data:
MD21159 $MC_JOG_JERK_ORI_ENABLE == TRUE
See also
Manual traversing of geometry axes/orientation axes (Page 668)
Manual traversing of the spindle (Page 667)
642
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA