NCPWB Technical Bulletin: What You Should Understand About GMAW (MIG) & FCAW Welding

While there is a lot of buzz about modern waveform controlled power sources and how they make it easier for a welder to make the root pass, the basics of MIG welding have not changed. This article describes the technical aspects of GMAW, explains how the metal gets from the wire to the workpiece (transfer modes), and highlights what contractors need to pay attention to when bringing the process into their shop or field fabrication site.