Be sure of complete fusion.
Use Intelligent Arc Control to make the first joint, the root pass. Intelligent Arc Control makes sure that fusion in this first joint is perfect. It makes up a solid groundwork with a flat weld appearance and you can proceed with the rest of your weld.
Intelligent Arc Control makes difficult downward welding of root passes easy, even for less experienced welders. With a 100% stable and focused modified short arc, you achieve complete fusion in root passes. This increases the quality of each weld.
Intelligent Arc Control registers every single welding cycle and automatically adjusts the arc 50,000 times per second. It predicts the next millisecond of the weld and constantly supplies the required energy.