Compact and Powerful Inverter MMA Welder   Robust and Powerful The Buddy™ Arc 400i and 400i XC are heavy duty, fan cooled, IGBT based inverter controlled power sources meant for MMA / TIG (scratch-start) welding.   MMA Welding A wide current range and powerful welding performance make the Buddy™ Arc machines suitable for a wide range of applications and electrode types such as: - General purpose - Low-hydrogen - Stainless steel - Cellulosic The Buddy™ Arc 400i XC model has controlled welding dynamics that provides excellent weld properties for welding pipe root passes.   TIG Welding The Buddy™ Arc machines are capable of performing TIG welding with precise current control. All you need is an optional TIG-torch with a gas valve, a gas regulator and a cylinder of gas. You can weld mild steel or stainless steel material with or without filler material.   Voltage Reduction Device – VRD In some areas a voltage reduction device, or VRD, is required.