Siemens SINUMERIK 840D Function Manual page 190

P2: Positioning axes
6.2 Own channel, positioning axis or concurrent positioning axis
● Dedicated feedrate override for each positioning axis
● Dedicated programmable feedrate
● Dedicated "axis-specific delete distance-to-go" interface signal
Dependencies
Positioning axes are dependent in the following respects:
● A shared part program
● Starting of positioning axes only at block boundaries in the part program
● With rapid traverse movement G0 path axes traverse as positioning axes in one of two
different modes
● No rapid traverse override
● The following interface signals act on the entire channel and therefore on positioning axes:
– DB21, ... DBX7.1 (NC start)
– DB21, ... DBX7.3 (NC stop)
– DB21, ... DBX7.7 (reset)
– DB21, ... DBX6.1 (read-in disable)
● Alarms specific to program and channel also deactivate positioning axes.
● Program control (dry run feed, program test, DRF, ... etc.) also act on positioning axes
● Block search and single block also act on positioning axes.
● The last block with a programmed end-of-motion criterion that was processed in the search
run serves as a container for setting all axes.
● Group 1 (modal movement commands) of the G commands (i.e. G0, G1, G2, ...) does not
apply to positioning axes.
Further information
Programming Manual NC Programming
Applications
The following are typical applications for positioning axes:
● Single-axis loaders
● Multi-axis loaders without interpolation (PTP → point-to-point traversing)
● Workpiece feed and transport
190
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA