HEIDENHAIN ND 1400 - Manual (Page 64)

50 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. Mul-
tiple points can be probed 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 recognize
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 se-
lecting the correct feature from a menu of alternatives in the DRO
screen.
NOTE
Points must be probed orthogonal to the contact surface for the system to correctly
apply probe tip compensation.
Measurement results are shown in the Feature list, View screen and DRO screen. The feature graphic in
the View screen 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 screen shows the feature type, feature position, form error, number of points used,
reference frame and the projection plane. When the minimum required points are probed, the form error
is zero. When more than the minimum are probed, the form error is the sum of the two greatest opposing
error magnitudes.
Points must be probed orthogonal
to the contact surface
Touch the feature type... to display the menu of alternative
types
Probed points are shown in the
View window