Siemens sinumerik 802d sl Operation And Programming Manual page 29
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The origin of this coordinate system is the machine zero.
All axes are at zero position here. This point only represents a reference point defined by the
machine manufacturer. It need not be approachable.
The traversing range of the machine axes can lie in the negative range.
Workpiece coordinate system (WCS)
The coordinate system described in the beginning (see Fig. 1-16) is also used to describe
the geometry of a workpiece in the workpiece program.
The workpiece zero can be freely selected by the programmer. The programmer need not
to know the real motion relations on the machine, i.e. he need not to know whether the work-
piece or the tool moves. Furthermore, it can be different from axis to axis. The directions are
always defined such if the workpiece would be resting and the tool would move.
W
Fig. 1-18
Relative coordinate system
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.
SINUMERIK 802D sl Operation and Programming Nibbling (BP-N), 06/2006 Edition
6FC5 398-3CP10-0BA0
Y
X
W – workpiece zero
Workpiece coordinate system
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Introduction
1.7
Coordinate systems
1-29
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