
14. MEASUREMENT
B–63503EN–1/01
704
The measuring reference point may be an imaginary point (imaginary
zero point), as shown in the figure below. The difference between the
imaginary zero point and the measuring tool nose tip position at the
mechanical reference point is settable as the tool offset value of the
measuring tool, by setting the distances from the imaginary zero point to
the respective contact faces as parameters.
+X
(0 , 0)
Z t
Zm
Zp Xp
Xm OFSx
OFS
Z
Xt
+Z
Measuring tool nose
position at the
mechanical
reference position
Machine
zero point
Measuring reference position
(Imaginary zero point)
When the imaginary zero position is set as the measuring reference position
The workpiece coordinate system shift amount for the Z-axis is settable
as follows: Bring the tool to touch the workpiece end face. Subtract the
tool geometry offset value of the tool (the value shifted in the coordinate
system by the tool geometry offset) from the machine coordinate value
(the distance from the measuring tool nose tip position at the mechanical
reference position (machine zero point) to the workpiece end face).The
result is set as the workpiece coordinate system shift value.
(Z axis workpiece coordinate system shift amount to be set
(EXOFSz) )
= (Z axis tool geometry offset value of the corresponding tool
(OFSz)) – (Z axis machine coordinate value(Zt))
Using the above methods, the workpiece coordinate system is set with
the workpiece end face (the contact point of the sensor) specified as
the programmed zero point of the workpiece coordinate system of the
Z-axis.
Example 2
D Setting the workpiece
coordinate system shift
amount