Siemens SINUMERIK 840D sl Function Manual

Also see for SINUMERIK 840D sl: Manual Function manual Function manual Function manual Function manual

Positioning Axes (P2)Own channel, positioning axis or concurrent positioning axisExtended FunctionsFunction Manual, 03/2009, 6FC5397-1BP10-4BA0 791● The last block with a programmed end-of-motion criterion that was processed in thesearch run serves as a container for setting all axes.● Group 1 (modal movement commands) of the G functions G0, G1, G2, ...) does not applyto positioning axes.References:Programming Manual Fundamentals.ApplicationsThe following are typical applications for positioning axes:● Single-axis loaders● multi-axis loaders without interpolation (PTP → point-to-point traversing)● Workpiece feed and transportOther applications are also possible:● With G0 workpiece delivery and workpiece transport can travel to their end pointsindependently of one another.● On machines with several machining processes in sequence: significant reduction inindividual machining steps due to block change in the braking ramp of the single-axisinterpolation.NotePositioning axes are not suitable for multi-axis loaders that require interpolation betweenthe axes (path interpolator).11.2.3 Concurrent positioning axisConcurrent positioning axes are positioning axes with the following properties:● Activation from the PLC need not take place at block limits, but can be implemented atany time in any operating mode (even when a part program is already being processed inthe channel).● Program command WAITP is required to move a concurrent positioning axis from the partprogram immediately after power ON.● The part program continues to run uninhibited, even if the concurrent positioning axis hasnot reached the position defined by the PLC.● An automatic axis change is possible, depending on the setting in the machine dataMD30552 $MA_AUTO_GET_TYPE.● With programming commands:– GET() or WAITP() becomes a concurrent positioning axis of thechannel axis again.– "RELEASE (axis)" or WAITP() is a channel axis that becomes aconcurrent axis under PLC control.