​A CNC plasma cutter is a metalworking tool that can be used to machine structural steel and other metals.CNC stands for "computerized numerical control" and refers to the automated software that controls the machining process. Plasma refers to the ultra-high temperature substance that is ejected from the torch and cuts metal. You've no doubt heard of plasma cutting, CNC machines and metal art design. Admittedly, there are a lot of issues that need to be addressed when talking about the plasma cutting process. So let's take a closer look at CNC plasma cutters.