Fundamental Geometrical Principles
1.2 Position of zero points
Fundamentals
1-10 Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
1.2 Position of zero points
The various origins (zero points) and reference positions are defined on the NC machine.
They are reference points
• for the machine to approach and
• for programming the workpiece dimensions.
The diagrams show the zero points and reference points for drilling/milling machines and
turning machines.
Milling:
::
0
<
;
Turning:
=
;
5
%
:
$
0
Reference points
They are:
M Machine zero
A Blocking point. Can coincide with the workpiece zero point (only turning
machines).
W Workpiece zero = Program zero
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