Good Performance Robotic Welding Machine MMA inverter machines are for electrode welding. We supply both IBGT and Mosfet machines according to the customer's requirement. Our machines have the following charactors: 1. small volume, light weight, efficient energy-conservation 2. easy to start ARC 3. stable ARC and little spatter 4. good welding quality 5. over-load and over-heat protecting 6. one year warranty 7. OCV availabel 140A/160A/200A/250A/350A/400A/500A