Own Channel, Positioning Axis Or Concurrent Positioning Axis; Own Channel - Siemens SINUMERIK 840D sl 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).
● Autonomous singleaxis operations:
Single PLC axes, command axes started via static synchronized actions or asynchronous
reciprocating axes can be interpolated independently of the NCK.
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.
11.2

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 655)").
● programmed in the same part program as the machining operation (see Section
"Positioning axis (Page 656)").
● started exclusively by the PLC during machining (see Section "Concurrent positioning
axis (Page 659)").
11.2.1

Own channel

A channel represents a self-contained NC which, with the aid of a part program, can be used
to control the movement of axes, spindles and machine functions independently of other
channels.
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
11.2 Own channel, positioning axis or concurrent positioning axis
P2: Positioning axes
655