HEIDENHAIN IK 5494-2D - Manual (Page 163)

5
Measuring
141
The skew line feature will be added to
the Features template and shown in the
Part View window.
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. The datum zero point 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 Select the crosshair probe if necessary by clicking the Probe/Crosshair menu item.
2 Click the Datum/Zero
menu item. A descrip-
tion of the datum zero
measurement process will
be displayed in a prompt
window.
3 Create the datum zero point by probing the de-
sired point, and then click OK in the prompt win-
dow.
The intersection of X and Y axes is probed with the
crosshair probe to perform a Datum zero
Creating a Measurement Reference