Main Axes/Geometry Axes - Siemens SINUMERIK 840Di sl Programming Manual

Fundamental Geometrical Principles
1.4 Axes
1.4.1

Main axes/Geometry axes

The main axes define a right-angled, right-handed coordinate system. Tool movements are
programmed in this coordinate system.
In NC technology, the main axes are called geometry axes. This term is also used in this
Programming Guide.
The "Switchable geometry axes" function (see Advanced) can be used to alter the geometry
axes grouping configured by machine data. Here any geometry axis can be replaced by a
channel axis defined as a synchronous special axis.
Axis identifier
For turning machines:
Geometry axes X and Z are used, and sometimes Y.
For milling machines:
Geometry axes X, Y and Z are used.
A maximum of three geometry axes are used for programming frames and the workpiece
geometry (contour).
The identifiers for geometry and channel axes may be the same, provided a reference is
possible.
Geometry axis and channel axis names can be the same in any channel so that the same
programs can be executed.
36
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals