MicroCT Part Metrology
In the world of "Reverse Engineering", there are a number of ways to qualify a product and verify its dimensions. During my co-op rotations at Kinetic Vision, I found it to be most beneficial to start with a simple 3D deviation colomap to show where our customers' scanned parts were deviating from their as-designed 3D CAD, and by how much. When dealing with injection molded or extruded parts, we would often run porosity analysis and check for flash, sink, or any other deformations. Taking this initial step prior to starting a full first article inspection allowed us to focus on the trouble areas in order to fully understand the cause of the problem. In many cases, the data we provided went above and beyond what the customer expected, and in turn, made it much simple for them to correct the issue. In the pictures above, the process is very simple. A polygonal file of the Lever was fit to the as-designed 3D CAD using a fully defined datum structure. After aligning the scan data, the appropriate tolerance band was chosen, and the deviation was computed. Also shown are annotations in areas that are reported out of specification, as well as a 2D whisker plot showing deviations at a given cross section location.