Rockwell Automation 5370-CVIM2 Module User Manual

Page 232

Chapter

Chapter 6

Reference Tools

6–73

The window tool, using the

Black Contours

operation, is further configured

to supply the X–axis and Y–axis coordinates of the object’s centroid, and
theta, which is the angle between the object’s major axis and the X–axis of
the image field. These values result from the

X Center

Y Center

, and

Theta

parameters selected in the

Target

panel, as shown in Figure 6.62, and

are the reference values that the build reference formula will “learn” and use
during operation.

Figure 6.62 Example: Selecting Contour Parameters for Use in Build Reference Tool

ЗЗЗЗЗЗЗЗ

ЗЗЗЗЗЗЗЗЗЗ

During operation, the task for the build reference tool in this example is to
calculate the difference, if any, between the “learned” theta angle and the
theta angle of the current inspected object, and to apply that angular
difference as rotation compensation to the two gage tools.

Initially, the build reference tool edit panel appears as it is shown in
Figure 6.57 (page 6–69). Note that “

Absolute

” is selected in the

X Mode

field, while the other mode fields are disabled. These are the default
selections for this tool edit panel.

Since the theta mode only is used in this example, the

X Mode

field must be

set to “

Disabled

”

and the theta mode enabled by selecting “

Absolute

” in the

Theta Mode

selection panel. Figure 6.63 (page 6–74) illustrates the general

method for making these selections.