Rockwell-automation 5370-CVIM2 Module User Manual download pdf (Page 376)

100

101

Chapter 7

Inspection Tools

7–138

The X and Y values are derived in a formula that is set up on the formula

entry keyboard as shown in Figure 7.104.

Figure 7.104 Example: Using the ATN2 Function in a Math Tool Formula

In this formula, inspection results from Gage 1 and Gage 2 are used. Since

these gages are both configured for the Y Position operation, the primary

results are the Y–axis coordinate values. Thus, {Gage 2}–{Gage 1} is

evaluated as 86 – 227, which is –141. The secondary results are the X–axis

coordinate values. Thus, {Gage 2.Ax}–{Gage 1.Ax} is evaluated as 398 –

141, which is +257. (In effect, this formula operates as though it were set up

using the constants –141 and +257, as in atan2(–141,257), which calculates

the angle as –28.751°.)

With the formula set up as shown in Figure 7.104, when you pick the

Nominal field in the math tool edit panel, the system performs one “test”

operation of the formula and returns an angle of –28.603°.

Example: DST Function

The “dst” (distance) function returns the distance, in pixels, from one point

to another in the image, using the X– and Y–axis coordinates of each point to

perform a calculation based on the Pythagorean theorem. Figure 7.105

provides an example that demonstrates its use in a formula.

Figure 7.105 Example: Two Gages Configured for Use in DST Function

Gage 1 Gage 2

X = 478

Y = 246

X = 33

Y = 246

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Rockwell-automation 5370-CVIM2 Module User Manual Page 376

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