MIG welding (Metal, Inert Gas) welding is also called GMAW (Gas, Metal Arc Welding.) It uses a thin wire as an electrode and filler fed by a wire feeder to the gun. The power source is constant voltage (CV) DC. There are two main process Gas (MIG) and gasless (flux core).
Mig Welding Machines from WIA, Uni-Mig, Dynaweld and Fragram.