Supplementary Conditions - Siemens SINUMERIK 840D sl Function Manual

B2: Acceleration
5.2 Functions
5.2.20.2

Supplementary conditions

Path override / overlaid motion
With path override / overlaid motion (e.g. DRF), the JOG-specific maximum values for
acceleration and jerk (MD32301 $MA_JOG_MAX_ACCEL and MD32436
$MA_JOG_MAX_JERK) are not effective. Instead, the values for positioning axis motions are
effective:
● Acceleration:
– MD32300 $MA_MAX_AX_ACCEL [0] (maximum axial acceleration for path motions in
● Jerk
– MD32430 $MA_JOG_AND_POS_MAX_JERK (maximum axial jerk for positioning axis
– MD32431 $MA_MAX_AX_JERK [0] (maximum axial jerk for path motions in the dynamic
See also Section "Jerk limitation with single-axis interpolation (SOFTA) (axis-specific)
(Page 262)".
Note
Only the dynamic response mode DYNNORM is always effective for JOG mode.
Behavior for manual traversing of geometry axes with active rotation
When manually traversing geometry axes in the SOFT acceleration mode (acceleration with
jerk limitation), the value from MD32436 $MA_JOG_MAX_JERK or MD32430
$MA_JOG_AND_POS_MAX_JERK is also used with active rotation or active orientable
toolholder.
Part program instruction SOFTA/BRISKA/DRIVEA
The part program instruction SOFTA(<Axis1>,<Axis2>, ... ) is also effective in JOG
mode, i.e. the maximum axial jerk from MD32436 $MA_JOG_MAX_JERK is effective for the
specified axes when traversing in JOG mode (exactly as when setting MD32420
$MA_JOG_AND_POS_JERK_ENABLE [<axis>] == TRUE).
Note
On the other hand the SOFT part program instruction has no effect on the JOG mode.
284
the dynamic response mode DYNNORM)
See also Section "Acceleration without jerk limitation (BRISK/BRISKA) (channel/axis-
specific) (Page 245)".
motions)
or (with G75/751):
response mode DYNNORM)
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions