Rockwell Automation 5370-CBPK Color CVIM BLISTER-PAK Option - Manual (Page 26)

Chapter 5
Auto Setup
5–6
If you expect that the values calculated by the auto setup process are likely to
be too low, you can use the
Min. Shape Tolerance menu item (before the
auto setup process) to enter higher minimum values that will override any
calculated values that are lower. These higher minimum values can be based
on the known mechanical characteristics of your own installation, on
experience, or on other criteria.
When you select the Min. Shape Tolerance menu item, an onscreen
calculator appears, on which you can enter minimum shape tolerance values
between 0% and 100%. The value that you enter determines the minimum
acceptable range of shape variation.
For example, if you enter a value of 15, it establishes a minimum acceptable
shape range of
15% . If the auto setup process then calculates a shape
tolerance of +12% and –17%, the plus (+) value would be forced to 15% (the
minimum value), while the minus (–) value would remain at 17%, since it is
higher than the minimum shape tolerance.
NOTE 1: Changing the minimum shape tolerance value after completing
the auto setup process will have no effect on the calculated shape tolerance
values. You can, however, alter the calculated shape tolerance values as
explained on page 6–11 under the Shape Tolerance heading.
NOTE 2: Under some circumstances, a tablet may appear distorted. Minor
variations in lighting or tablet orientation may result in identical objects
presenting different profiles. Those different profiles appear more or less
circular to the system. In rare cases, slight differences in the actual shape of a
tablet or capsule may be acceptable. Most often, however, you will seek a
minimum shape tolerance value that minimizes false rejects, and at the same
time fails blisters containing broken or malformed tablets or pockets
containing multiple tablets.
Variation Scale
The variation scale parameter expands the tolerance range limits that the
system calculates during the auto setup process.
During auto setup, the Color CVIM BLISTER-PAK option gathers the
number of images determined by the value of the teach count parameter. It
then analyzes those images to identify a range of variation in position, area,
and shape for each object in the image. On the basis of those observed
ranges, it automatically calculates range values for position, area, and shape.
If a calculated range value is less than the corresponding minimum value that
appears in the
Configure menu, the system will ignore the calculated value
and use the minimum value instead.