Rockwell Automation 5370-CVIM2 Module - Manual (Page 227)

Chapter 6
Reference Tools
6–68
Figure 6.55 Example: Relation Between Window, Build Reference, and Gage Tools in
Toolset Edit Panel
Figure 6.55 also indicates the relation between the four tools: The window
tool must be processed first in order to supply data to the build reference
tool; the build reference tool must be processed second in order to supply
“X–only” shift compensation to the gage tools; and the gage tools must be
processed last because they require the results from the preceding two tools.
In this example, the window tool is positioned over the object as shown in
Figure 6.56, and it is configured for the
Black Contours operation. The
window tool’s horizontal size, and its initial position over the object, are
determined by the expected extent and direction of the object’s shift along
the X–axis. (Since no vertical shift is expected in this example, the window
tool’s vertical size can be minimized.)
Figure 6.56 Example: Window Tool Positioned Over Object
Window
Object
The “ X Center ” measurement function is selected for the window tool’s
Black Contours operation. This function calculates the X–axis coordinate of
the center of an object, and the resulting value will be supplied to the build
reference tool for use in its “X–only” reference operation.
Initially, the build reference tool edit panel appears as it is shown in
Figure 6.57 (page 6–69). Note that “
Absolute ” appears in the X Mode field,
while the other mode fields are disabled. These are the default selections for
this tool edit panel. (The effects of using the “
Absolute ” and “ Delta ”
methods of calculating shift and/or rotation compensation are discussed
later.)