Rockwell Automation 5370-CVIM2 Module User Manual

Page 219

Chapter 6

Reference Tools

6–60

After the pass configuration is complete, a “learn” operation must be
performed by picking the

Nominal

field in the tool edit panel. This

establishes the “nominal” coordinates and rotation angle of the rotation
finder tool, and thereby enables it to be used by other tools as a rotation
compensation source.

When the

Nomina

l field is picked, the

Feature Locations

panel appears

first, as shown by Figure 6.51. Note that a radius line extends from the center
of the circular object to the index mark.

Figure 6.51 Example: Rotation Finder “Learning” Nominal Values

ЗЗЗЗ

ЗЗ

X–axis 0

Radius

line

The values appearing in the

Feature Locations

panel reflect the X– and

Y–axis coordinates of the “head” of the radius line, along with the RMS
error, which is the calculated RMS (root mean square) error for the feature
(the index mark in this example). For details about RMS error calculations,
refer to the Pixel Error Parameter Selections section on page 6–43.