Rockwell Automation 5370-CBPK Color CVIM BLISTER-PAK Option - Manual (Page 52)

Chapter 6
Adjusting Blister Windows
6–10
Figure 6.9
Examples: Longest Axis of the Bounding Box Around Objects in Various Orientations
A B C D
Longest axis
Longest axis
Similarly, with a 5% X–axis tolerance setting, the position of object B could
change on the X axis a distance equal to 5% of the length of the longest axis
of its bounding box, which, in this case, lies along the Y axis.
During cursor adjustment, the outlines of the objects will be displayed.
Objects that are “out of position” (for one or both current cursor settings)
will be shown in red, while those that are within both position tolerance
settings will be shown in green.
Area Tolerance
The function of the area tolerance feature is to accommodate the small
variations that may normally occur in the area of objects as a result of
shadows, reflections, or minor imperfections. The
Area Tol menu item
enables you to control how much area variation will be allowed in your own
application.
The system calculates an area tolerance value during auto setup. This value
will never be be less than the minimum area tolerance value that you entered
on the
Configure menu. With the manual area tolerance adjustment,
however, you may set any value you choose, even one that is smaller than the
minimum area tolerance value.
When you pick the Area Tol menu item, an Area Tol slide bar appears with
two cursors, one each for positive and negative area adjustments. When you
move one of the cursors up or down, the corresponding area tolerance value
in the adjacent field changes accordingly over a range of 0% to 100% (the
default tolerance is 10% for the positive and negative adjustments).
As an example, suppose you select a plus (+) area tolerance of 20%. This
setting requires the system to accept individual objects whose area is up to
20% greater that the expected area.
During cursor adjustment, the outlines of the objects will be displayed.
Objects that are too large or too small (for the current cursor settings) will be
shown in red, while those that are within both area tolerance settings will be
shown in green.