Page
Chapter: 6
Section:
PROGRAMMING
5
REFERENCE SYSTEMS
6.3 REFERENCE SYSTEMS
6.3.1 REFERENCE POINTS
A CNC machine must have the following reference points established:
*
Machine Reference Zero or origin point of the machine. It is set by the machine
manufacturer as the origin of the coordinate system of the machine.
*
Part Zero or origin point for the part. It is the origin point set to program the
measurements of the part. It can be chosen freely by the programmer and its reference
to the machine reference zero is set by means of a zero offset.
*
Machine Reference Point. It is the physical location of the marker pulse or reference
pulse (Io) used as home to synchronize the whole machine coordinate system. The
axis moves to this point when being “homed” and the CNC assumes the reference
values set at machine parameters “P2, P42”.
M
Machine Reference Zero.
W
Part zero.
R
Machine reference point.
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