A fixture is a previously defined inspection type that can be leveraged by other inspection steps to help position the search area relative to the fixture. A common reason to use a fixture is if the items will be moving down the production line in unpredictable positions and rotations.
For example, in our pill pack inspection below for lot code and expiration date, we are using the “EXP” text as a fixture to help position our inspection search areas. Without the fixture, our search area would be much larger and inspection performance would decrease.
Inspection tools that are eligible to be fixtures are: Pattern, Shape, Copies, Contour, Edge, and Barcode. For tools that can potentially return more than one object, we will use the first object found as the fixture.
When building out inspection steps, one of the first options will be to assign the inspection to a fixture as seen below.
To easily see which steps are using a fixture, in the master inspection list you will see a box with a number on the right side of the card. In the example below, Brand Name, Ingredient 3, and GMO are all using Ingredient 1 (Step A) as a fixture.