HEIDENHAIN ND 1300 OED and Crosshair Systems - Manual (Page 50)

32 QC-300 Series User’s Guide
Create a datum zero point
Creating the datum zero point is the final step in establishing a valid Cartesian or polar coordinate system
for subsequent measurements. The datum zero point will be used as the origin of the measurement system.
The datum zero point can be positioned in any location that satisfies the measurement requirements of the
user and can be created by probing a point or by constructing a point from parent features.
Probing a datum zero point
The datum zero point can sometimes be created directly by probing a point. Simple probing is often pos-
sible when the part is precisely aligned in the stage.
To probe a datum zero point:
1 Touch the measure point icon. Probe the desired point for the datum zero, and then press the Finish
key. In this example, the lower left corner of the QC Quicky slide is probed. The point will be added to
the Feature list.
2 While the point feature is
selected, touch the X and Y axis
Zero buttons to zero the values
and establish a datum zero at the
probed point. The point will then
be shown in blue in the feature
list.