HEIDENHAIN ND 1300 VED and Crosshair Systems - Manual (Page 114)

94 QC-300 Series User’s Guide
Probing angles
Four probed points are required to measure an angle. The four points must be probed in a prescribed
pattern on the two lines that form an angle. There is no practical limit to the number of points that can be
probed, and in general accuracy is increased by probing more points.
As shown here, the correct pattern of points probed for an angle is:
• A minimum of two points well distributed along the reference side, followed by
• A minimum of two points well distributed along the opposite side of the included angle
• The same number of points must be probed on each of the two sides
The View window shows the fea-
ture and the points used to define
it. The DRO window shows the
number of points probed, the co-
ordinate location of the angle and
the angle orientation to the skew
axis.
The included angle is shown as
the default measurement result, however, the angle type can easily be changed by selecting the desired
angle type from a menu of alternatives in the DRO window.
Probe the first two points on the reference side... and then probe two points on the other side of the
included angle
Included angle 360 - angle 180 - angle 180 + angle