HEIDENHAIN ND 1300 VED and Crosshair Systems - Manual (Page 74)

54 QC-300 Series User’s Guide
Using video probes
Four video probes are available for creating reference levels, skews and datums and for measuring regular
geometric features including points, lines, arcs, circles, slots, rectangles, distances and angles. Probes
include:
• Crosshair Standard crosshair of two lines crossed at 90 degrees. Single points can be
acquired manually or automatically.
• Offset crosshair Crosshair of two lines with a regular pattern 3 pixel square wave offsets,
crossed at 90 degrees. Single points can be acquired manually or automatically.
• Single edge Standard crosshair with a small circle at the center for positioning the edge
detector. Single points can be acquired manually or automatically.
• Multiple edge Standard crosshair with 2 small concentric circles at the center for positioning
the edge detector. Multiple points can be acquired for certain feature types
automatically.
Firing a video probe generates one or more orthogonal scan lines, which acquire points as the scans cross
an edge bounded by light and dark areas of the screen image. The use of these four probes is very straight-
forward, as shown below.
Selecting a probe
To select a new probe:
1 Select a new probe type by
touching any part of the current
probe on the Video window. The
four probe choices will be shown
on the probe pop-up screen.
Crosshair Offset crosshair Single edge Multiple edge