
B–62073E–1/042. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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Example 2 An arbitrary point on the machine is used as the measurement reference position.
Set the distance between the reference position and each sensing point of the touch sensor
in a parameter. The distance between the measurement reference position and the tip of the
tool to be measured when the tool is at the machine zero point can be set as the tool geometry
compensation. In this case, the measurement reference position along the X–axis should
generally be the center of the spindle (X = 0 in the workpiece coordinate system). The mea-
surement reference position along the Z–axis can be set as desired. However, the distance
from the reference position to the end of the workpiece should be measured in the following
way and set as the shift distance for the workpiece coordinate system. The distance between
the workpiece reference position and the tip of each tool when the tool is at the machine zero
point can thereby be set as the tool geometry compensation (for the Z–axis, also add the shift
distance for the workpiece coordinate system to obtain the actual distance from the work-
piece reference position).
+X
+Z
Xt
Xm
Xp
GOFSx
Zm
Zt
Zp
GOFSz
Position of the blade
tip of the tool to be
measured in machine
coordinate system
Zero point in machine
coordinate system
Workpiece