Rockwell Automation 5370-CBPK Color CVIM BLISTER-PAK Option - Manual (Page 49)

Chapter 6
Adjusting Blister Windows
6–7
The Extra Area % menu item enables you to set the allowable percentage of
extra area for your application (the default setting is 20%).
During an inspection operation, if the system finds that the extra area
exceeds the object area by more than the extra area setting, it will assume the
presence of a “foreign” object touching the object, as illustrated in
Figure 6.6.
(A separate contour or “hole” in the background, such as the one shown in
Figure 6.6, will always be regarded as a “foreign” object if it exceeds the
minimum background area setting.)
When you pick the Extra Area % menu item, an Extra Area % slide bar
appears. Use the cursor to select any extra area value between 0% and
1000%. When you move the cursor up or down, the value in the
Extra Area
% menu item changes accordingly.
Extra Area % (Aluminum Blisters)
This section applies only if you selected Enabled in the Aluminum: menu
item. In this case, it is assumed that the blister package is made of aluminum
(or is covered with it)
1 and has pockets that are easily distinguishable (to the
system) from the rest of the blister package. Thus, when the background
color is learned during the auto setup process, the pockets are not included as
part of the background color. Instead, the pocket color is learned in a
subsequent step, and it is regarded as a second background color.
The term “extra area” refers to any area inside a pocket in which the pocket
color is absent. In typical applications, some extra area may be unavoidable
because of lighting constraints or other factors that cannot be changed. In
these situations, the
Extra Area % feature can be used to accommodate this
normally occurring extra area.
Figure 6.7 (page 6–8) illustrates the extra area concept for aluminum
blisters.
The Extra Area % menu item enables you to set the allowable percentage of
extra area for your application (the default setting is 20%).
During an inspection operation, if the system finds that the extra area
exceeds the object area by more than the extra area setting, it will assume the
presence of a “foreign” object inside the pocket, as illustrated in Figure 6.7.
(A separate contour or “hole” in the background, such as the one shown in
Figure 6.7, will always be regarded as a “foreign” object if it exceeds the
minimum background area setting.)
1 This Enabled selection can also be used for plastic blisters in which the pockets cannot be blended into the
background color, for whatever the reason.