Overview The HL-YAG-200W/400W is a 1064 nm pulsed YAG laser welding machine mounted on a 2-axis CNC worktable. It performs spot welding, butt welding, stack welding and seam sealing on carbon steel, alloy steel, stainless steel and dissimilar steel joints, with pulse energy of 90 J (200 W) or 150 J (400 W), a 0.3–1.2 mm spot and welding depth from 0.1 mm to 3.5 mm. Programming is done offline: the controller drives straight lines, arcs and free trajectories, so a single