HEIDENHAIN ND 1300 VED and Crosshair Systems User Manual

Page 56

QC-300 Series User’s Guide

Creating 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 Cartesian or polar sys-

tems. 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 more often

possible when the part is precisely aligned in the stage.

To probe a datum zero point:

1 Touch the Point Measure 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 Quickie slide was probed. The point will be added

to the Features list in blue.

2 Select the DRO window, and

while the point feature is selected

touch the X and Y axis Zero but-

tons to zero the values and estab-

lish a datum zero at the probed

point.