Own Channel, Positioning Axis Or Concurrent Positioning Axis - Siemens SINUMERIK 840D Function Manual

Motions and interpolations
Each channel has one path interpolator and at least one axis interpolator with the following
interpolation functions:
● for path interpolator:
Linear interpolation (G1), circular interpolation (G2 / G3), spline interpolation, etc.
● for axis interpolator:
If a positioning axis is programmed, an axis interpolator starts in the control (with linear
interpolation G1).
● End-of-motion criterion:
The programmed end position of a positioning axis has been reached when the end-of-
motion criterion FINEA, COARSA or IPOENDA is fulfilled.
● Path axes with rapid traverse movement:
Path axes can be traversed in linear or non-linear interpolation mode with rapid traverse
movement (G0).
Further information
Function Manual Basic Functions; Continuous-path mode, exact stop, LookAhead
● Autonomous singleaxis operations:
Single PLC axes, command axes started via static synchronized actions or asynchronous
reciprocating axes can be interpolated independently of the NC.
An axis/spindle interpolated by the main run then reacts independently of the NC program.
The channel response triggered by the program run is decoupled to transfer the control of
a certain axis / spindle to the PLC.
● Control by PLC:
All channel-specific signals normally act to the same extent on path and positioning axes.
Positioning axes can be controlled via additional, axis-specific signals.
PLC axes are traversed by the PLC via special function blocks in the basic program; their
movements can be asynchronous to all other axes. The travel motions are executed
separate from the path and synchronized actions.
6.2

Own channel, positioning axis or concurrent positioning axis

When axes are provided for auxiliary movements on a machine tool, the required properties will
decide whether the axis is to be:
● programmed in an internal part program (see Section "Own channel (Page 188)").
● programmed in the same part program as the machining operation (see Section
"Positioning axis (Page 188)").
● started exclusively by the PLC during machining (see Section "Concurrent positioning axis
(Page 191)").
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
6.2 Own channel, positioning axis or concurrent positioning axis
P2: Positioning axes
187