Rockwell Automation 5370-CBPK Color CVIM BLISTER-PAK Option - Manual (Page 51)

Chapter 6
Adjusting Blister Windows
6–9
Figure 6.8
Example: Define Tolerances Menu and Min. Area Slide Bar Adjustment
Min. Area
slide bar
Cursor
Micro–adjust
button
Micro–adjust
button
Position Tolerance
The function of the position tolerance feature is to accommodate the small
variations that may normally occur in the position of objects. The
Position
Tol menu item enables you to control how much position variation will be
allowed in your application.
The system calculates a position tolerance value during auto setup. This
value will never be be less than the minimum position tolerance value that
you entered on the
Configure menu. With the manual position tolerance
adjustment, however, you can set any value you choose, even one that is
smaller than the minimum position tolerance value.
When you pick the Position Tol menu item, a Position Tol slide bar appears
with two cursors, one each for the X axis and Y axis. When you move one of
the cursors up or down, the corresponding tolerance value in the adjacent
field changes accordingly over a range of 0% to 100% (the default tolerance
is 10% for each axis).
As an example, suppose you select a Y–axis tolerance of 5%. This setting
requires the system to accept individual objects whose Y–axis position varies
by up to 5% from the expected position. Note, however, that the position
tolerance setting pertains to movement along the object’s longest axis, as
indicated by its “bounding box.” Thus, with a 5% tolerance setting for the Y
axis, the position of object A (Figure 6.9, page 6–10) could change on the Y
axis a distance equal to 5% of the length of the longest axis of its bounding
box, which, in this case, lies along the X axis.