Siemens SINUMERIK 802D sl Programming And Operating Manual page 18

Description
1.5 Coordinate systems
Workpiece coordinate system (WCS)
To describe the geometry of a workpiece in the workpiece program, a right-handed, right-
angled coordinate system is also used.
The workpiece zero can be freely selected by the programmer in the Y axis. In the Z axis, it
lies in the turning center.
Figure 1-5
Relative coordinate system (REL)
In addition to the machine and workpiece coordinate systems, the control system provides a
relative coordinate system. This coordinate system is used for setting reference points that
can be freely selected and have no influence on the active workpiece coordinate system. All
axis movements are displayed relative to these reference points.
Note
The actual value in the associated coordinate system can be activated and displayed in the
"Position" operating area using the "MKS/WKS REL" vertical softkey.
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Workpiece Coordinate System
Programming and Operating Manual, 11/2012, 6FC5398-5CP10-3BA0
Surface grinding