HEIDENHAIN ND 1300 OED and Crosshair Systems User Manual

Page 80

QC-300 Series User’s Guide

Probing specific feature types

While the probing process is essentially the same for all feature types, the minimum number of points

required and the geometric placement of these points are different. The unique requirements for probing

each feature type are described in the remainder of this section.

Probing points
A minimum of one probed point is required to measure a point.

Multiple points can be probed if the feature location is indistinct

and it is considered a benefit to use the geometric average of many

probed locations.

When a single point is probed, Measure Magic will correctly recog-

nize a point and assign the correct feature. However, when multiple

points are probed, it is possible that the wrong feature type will be

assigned. If the wrong feature type is assigned, it can easily be

changed by selecting the correct feature from a menu of alternatives in the DRO window.

Measurement results are shown in the Feature list, View window and DRO window. The feature graphic in

the View window shows the feature and the points used to define it. Errors are shown as whiskers connect-

ing the probed points to the feature. The maximum errors are shown in red and are used in the calculation

of form. The DRO window shows the number of points used, the form and the coordinate location of the

feature. When only one point is probed, the form error is zero. When more than one point is probed, the

form error is the sum of the two greatest opposing error magnitudes.

A single point is probed to measure

a point

Touch the feature type...

to display the menu of alternative

types

Probed points are shown in the

View window