3 Directions of Movement, Dimensioning 05.91
3.4 Reference points
3.4 Reference points
The zeros and various reference points are defined on all numerically controlled machine tools.
The machine zero M is the design zero of the machine coordinate system.
The workpiece zero W is the zero defined for programming the workpiece dimensions. It can
be freely selected by the programmer. The relationship to machine zero is defined by the zero
offset.
The machine reference point R is a point defined by the machine manufacturer which is
approached when the control is powered up and which synchronizes the system.
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The reference dimension is defined in the
machine data.
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P is the reference point for setting the tool.
Example: Turning machine (machining in front of the centre of rotation)
ZMR
ZMW
XFP
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W
F R
+Z
P
M
+X
ZFP XMR
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3–6 © Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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