Rockwell Automation 5370-CVIM2 Module - Manual (Page 231)

Chapter 6
Reference Tools
6–72
Example: Theta Operation
This section provides a simple example that illustrates a theta operation using
the “
Absolute ” method of operation. In this example, a build reference tool
is configured to provide only rotation compensation to a pair of gage tools.
Specifically, this example uses a window tool ( Tool 1 ), configured for the
Black Contours operation, to supply theta angle and centroid coordinate
values to a build reference tool ( Tool 2 ). Tool 2 then applies these values as
rotation compensation to each of two gage tools ( Tool 3 , Tool 4 ), whose
function is to measure the height and width of the object. For the purposes of
this example, the object is assumed to rotate in the image field.
Figure 6.60 shows how these four tools are arranged in the toolset edit panel.
Their order in the panel, from top to bottom, determines the order in which
they are processed.
Figure 6.60 Example: Relation Between Window, Build Reference, and Gage Tools in
Toolset Edit Panel
Figure 6.61 shows the window tool in this example positioned over a dark
rectangular object. The two gage tools are positioned vertically and
horizontally across the object.
Figure 6.61 Example: Setup of Window and Gage Tools
Inspected
object
Gage
Window
Build reference
tool name
Gage