CNC machines must be properly set-up prior to machining to assure that manufactured parts have the correct flatness and design contours. Early examination of the workpiece during the setup procedure helps save time and money. In this case, the relevant parameters are checked before the CNC machine is started; then, the process settings are optimized.
Example: Machine-processed Part
The series of images located to the right shows a processed part with two surfaces which are stacked horizontally. The small surface which has been lowered by nearly 3 mm is measured to see how parallel it is to the upper surface and how flat it is.