Plasma cutters utilize an electrically powered stream of superheated ionized gas—a plasma—to achieve localized thermal cutting action by generating a focused arc that melts and blows away metal.
Cutting Arc Mechanics
At its core, a plasma cutter is not merely a torch; it is a precise delivery system for controlled energy. The mechanism relies on electrical power to ionize an inert gas through an electrode tip, creating the superheated state we call plasma. When this process works correctly, the resulting arc passes through the metal workpiece, generating temperatures hot enough to melt the material and simultaneously providing the force needed to blow the molten puddle away using a secondary stream of pressurized air. This controlled combination of intense heat and directed airflow is what defines the cutting action.
Understanding the mechanics means understanding the parameters: A typical DC voltage range required to start and maintain this powerful arc falls between 200–400 volts DC. The performance, however, doesn't just depend on the electrical input; it hinges critically on the compressed air supply. For example, a specific plasma cutter rated at 40