Rockwell Automation 5370-CVIM2 Module - Manual (Page 142)

Chapter 5
Pick and Place Function
5–12
Figure 5.11 shows the pick and place points that apply to an elliptical
window. (Note that the default elliptical window appears as a circle.)
Figure 5.11 Pick and Place Points for an Elliptical Window
•
A
B
C
D E
Note that pick and place points are located at the center of the window (A)
and at the cardinal positions (B, C, D, and E) around the circumference of the
window. These pick and place points have the following functions:
•
Center of window –– The center pick and place point enables you to
move the entire window anywhere within the image field without
changing the window’s shape or size.
•
Circumference points –– The circumference pick and place points
enable you to drag the circumference either toward or away from the
center of the ellipse, while the center point remains anchored. Thus, you
can drag the right and left sides to the right and left, and the top and
bottom sides up and down. The effect is to stretch or compress the ellipse,
and thereby change both the size and shape of the elliptical window.
Figure 5.12 (page 5–13) demonstrates the operation of the elliptical window
pick and place points in three steps, as follows:
•
Step 1: The window is picked at point E, dragged to point E
′, and then
placed at point E
′. This decreases the width of the ellipse.
•
Step 2: The window is picked at point C, dragged to point C
′, and then
placed at point C
′. This decreases the height of the ellipse.
•
Step 3: The window is picked at center point A, the entire window is
dragged to point A
′, and it is then placed (unaltered) at point A′.