HEIDENHAIN QUADRA-CHEK 3000 Operating Instructions Manual page 197

Measurement | Capturing measuring points
The product provides the Crosshair VED tool as well as active VED measuring
tools such as Single edge or Circle.
When capturing measuring points with the Crosshair tool, the operator specifies
the measuring point by manually positioning the measuring tool in the live image.
Active VED measuring tools allow an objective acquisition of measuring points
because the product detects a light-to-dark transition within a defined search range
of the measuring tools by evaluating the contrast. The measuring point acquisition
is initiated by the operator or automatically by the product, depending on the
configuration.
Circle VED measuring tool with captured measuring points
Based on the position of the VED measuring tool in the live image and the axis
positions, the product acquires the coordinates for the measuring point. The
product determines the feature from the captured measuring points according
to the selected geometry. The new feature is shown in the feature list of the
Inspector. The number of measuring points that need to be captured for a feature
depend on the configuration of the selected geometry.
Further information:
The procedure for capturing measuring points with a sensor is basically
the same for all geometries and is thus described below by way of an
example geometry.
HEIDENHAIN | QUADRA-CHEK 3000 | Operating Instructions | 6/2016
"Overview of geometry types", page 191
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