AARC series is Digtal model with MCU control technology , which provide multi parameters adjustment, such as: Arc Force Current, Knee Point Voltage, Arc Starting Time, Arc Starting Current. By setting of Knee Point Voltage, the power source can be adapted to long and short cable welding. With setting of arc starting time, brings 100% ARC start success rate. AARC series give a highly stable DC arc and ensure perfect welding in all situations and positions.