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Installation manual
CNC 8055
CNC 8055i
7.
CONCEPTS
SOFT: V02.2X
Reference systems
7.6 Reference systems
A CNC machine needs the following origin and reference points defined :
Machine zero
Machine’s origin point. This is set by the manufacturer as the origin of the coordinate system of the
machine.
Part zero
Part origin point. This is the origin point that is set for programming the measurements of the part.
It can be freely selected by the programmer, and its machine reference zero can be set by the zero
offset.
Reference point
This is a point on the machine established by the manufacturer (physical location of the marker pulse
from the feedback device).
When the feedback system is semi-absolute (with distance-coded reference mark, Io), this point is
only used when leadscrew error compensation must be applied on the axis.
When the feedback is a normal incremental system (without distance-coded reference mark, Io),
besides using this point in the leadscrew error compensation, the system is synchronized at this
point instead of having to move the axis all the way to the Machine Reference Zero (home).
M Machine zero
WPart zero
R Machine reference point
XMW, YMW, ZMW, etc Coordinates of the part zero
XMR, YMR, ZMR, etc Coordinates of machine reference point
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