To solve the challenge of welding joint shapes with variation in the joint gap when using high-tensile materials or aluminum, OTC Daihen has evolved its robotic welding technology, creating Synchro-feed Evolution with Push Arc welding mode. Push Arc creates an ultra-low-spatter, wide and flat bead that is achieved by improving the wire feed control frequency and adding a new waveform control to improve the welding joint tolerance. It shortens the arc length by increasing the short-circuit frequency, the force and the number of times the arc pushes the molten metal to spread the molten metal into a wide and flat bead.