The machining process of physical prototyping begins with a solid block of material, where the excess material is carved away to produce the model. This is an efficient way to produce parts with simple geometry out of hard plastic or metal.
Unlike other methods of 3D prototyping that rely on building prototypes or models in a layer by layer process, machining creates parts through a subtractive process. We begin with a large block of raw material, such as metal or platsic, and the machining process cuts away until the final product is produced. Machining is an ideal process for creating round parts such as: bolts, small hardware pieces, nozzles, engine components, etc.
An advantage of machining is that it allows for improved accuracy, efficiency, and safety when producing prototypes, as compared to other metalworking processes.