Rockwell Automation 5370-CVIM2 Module - Manual (Page 213)

Chapter 6
Reference Tools
6–54
A rotation finder tool can be selected when the toolset edit panel is on the
screen. Starting from the main menu bar, the selection path to this panel is as
follows: Editors
→ Configuration → Setup → Tools. (This selection path
is shown by an example in Chapter 7, Inspection Tools, Figure 7.2 on page
7–3.)
Here is a summary of the basic selection and configuration steps for a
rotation finder tool, listed in their normal order of performance.
1. Configure source window –– position the circular source window over
the appropriate part of the workpiece image.
2. Configure destination window –– set the rectangular destination
window to an appropriate size.
3. Select filter function –– if appropriate, perform morphology filtering on
destination window image.
4. Save feature image –– use the Image Manager panel for the following
tasks:
a. “Pick and place” feature window –– position the feature window
over the appropriate feature on the destination window image.
b. Select feature image compression parameters
c. Specify file name –– to enter a device code and feature name, then
store the feature image in a file on the selected device.
5. Configure feature window:
a. Select number of passes –– select the number of passes (one or
two) that the feature window will make through the search
window.
b. Select “pass” parameters –– select the appropriate masking,
scaling, and other parameters for each “pass.”
6. Learn nominal values –– perform a “learn” operation to “learn” and
store the “nominal” values –– the data that indicate the workpiece’s
initial position.
Figure 6.44 (page 6–55) through Figure 6.52 (page 6–61) illustrate an
extended example in which a rotation finder tool is configured to detect
rotation of a small black “index mark” in a circular object. When it detects a
rotated index mark, the rotation tool applies rotation compensation to an
associated line gage tool, which is positioned horizontally over a small
rectangular object inside the circular object.
NOTE: The rotation finder tool’s source window must always be aligned
with the center of rotation of the circular object. In addition, if the circular
object is expected to shift in the image field, a reference line tool will be
needed to compute the shift and apply the corresponding shift compensation
to the source window. (Used with a reference line tool, the rotation finder
tool will also supply shift compensation to the associated tools.)
Overview: Rotation Finder
Tool Configuration
Rotation Finder Tool
Configuration: Example