Why a CNC is used
A plasma cutting torch is a commonly used tool for cutting metals for a wide variety of purposes. A hand-held plasma torch is an excellent tool for quickly cutting through sheet metal, metal plates, straps, bolts, pipes, etc. Hand-held plasma torches also make an excellent gouging tool, for back-gouging weld joints or removing defective welds. A hand torch can be used for cutting small shapes from steel plate, but it’s impossible to get good enough part accuracy or edge quality for most metal fabrication. That is why a CNC plasma is necessary.
A “CNC plasma” system is a machine that carries a plasma torch, and can move that torch in a path directed by a computer. The term “CNC” refers to “Computer Numerical Control”, which means that a computer is used to direct the machines motion based on numerical codes in a program.