Siemens SINUMERIK 840D Function Manual page 640

H1: Manual traversing
17.3 Parameter assignment (general)
Rapid traverse override
If the traversing keys/handwheel are also actuated together with the rapid traverse override
key, the movement will be made with the configured rapid traverse velocity:
● Machine axes
– MD32010 $MA_JOG_VELO_RAPID (rapid traverse in jog mode)
– MD32040 $MA_JOG_REV_VELO_RAPID (revolutional feedrate for JOG with rapid
● Geometry axes
– MD21160 $MC_JOG_VELO_RAPID_GEO (conventional rapid traverse for geometry
● Orientation axes
– MD21150 $MC_JOG_VELO_RAPID_ORI (conventional rapid traverse for orientation
Feedrate override
The velocity applied for manual traversing can also be influenced using the axis-specific
feedrate override switch provided that the following NC/PLC interface signal is set:
DB31, ... DBX1.7 (axis-specific feedrate override active)
Percentages are assigned to the individual feedrate override switch positions via machine data.
For a switch position of 0 % the axis is not traversed, provided that 0 is entered in the associated
machine data.
The interface signal DB31, ... DBX1.7 (axis-specific feedrate override active) has no meaning
for switch position 0 %.
Instead of being set by the feedrate override switch position (gray code), the percentage value
(0 % to 200 %) can optionally be set directly by the PLC. Again, the selection is made via
machine data.
Further information
V1: Feedrates (Page 125)
Spindle override
The velocity during manual traversing of the spindle can be influenced by the spindle override
switch.
Further information
S1: Spindles (Page 733)
Acceleration and jerk
The axis-specific acceleration and jerk limitation values also take effect in JOG mode.
It is also possible to limit acceleration and jerk channel-specifically for manual traversing of
geometry and orientation axes. This enables better handling of the kinematics that generate
Cartesian motions entirely via rotary axes (robots).
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traverse override)
axes)
axes)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA