Rockwell-automation 5370-CVIM2 Module User Manual download pdf (Page 227)

100

101

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.)

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