Main Axes - Siemens SINUMERIK 840D sl Function Manual

K2: Axis Types, Coordinate Systems, Frames
10.2 Axes
Instructions POS and POSA are used to program positioning axes and define block change
criteria:
● POS
Block change takes place when the path axes and positioning axes have reached their
block end points.
● POSA
Block change takes place when the path axes have reached their end of block position.
Positioning axes continue to traverse beyond block limits to their block end point.
Concurrent positioning axes differ from positioning axes in that they:
● Only receive their block end points from the PLC
● Can be started at any time (not at block limits)
● Do not affect the execution of current part programs.
Application
Typical positioning axes are:
● Loaders for moving workpieces away from machine
● Tool magazine/turret
Reference
For further information, see Section "P3: Basic PLC program for SINUMERIK 840D sl
(Page 821)" and "S1: Spindles (Page 1199)".
References:
● Function Manual, Extended Functions; Positioning Axes (P2)
● Function Manual, Special Functions; Gantry Axes (G1)
● Function Manual, Special Functions; Axis Couplings and ESR (M3)
● Function Manual, Extended Functions; Oscillation (P5)
● Function Manual, Synchronized Actions
10.2.8

Main axes

Meaning
A main axis is an axis that is interpolated by the main run.
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions