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boast. Contact Portland Precision today to get us started on your next job. Included Links. CNC (Computer Numerical Control)Machining is a subtractive manufacturing procedure that involves using high speed, accuracy devices to eliminate plastic or metal from a block("blank")to create the style of a part. Solution Can Be Seen Here takes a particular set of code and uses that to eliminate a part from a blank. For example, the code will start off informing the maker where to place the tooltip, how quick the tooltip must spin and to what coordinates the tooltip must transfer to(CNC machines utilize collaborates on a set axis such as x, y and z axis ). Machines frequently controlled in this manner consist of vertical milling makers, horizontal milling machines, lathes, routers and mills.