1.track welding seam 2.improve welding efficiency 40% 3.save welding time 30% 4.over-current and over-voltage protect Laser Seam-Tracking, assistant automatic welding machine, can use for Welding Lamp-post. Below is introduction. 1. FunctionsWhen the welding seam is long, not straight, or spiral, our machine can control welding torch move along welding seam direction strictly, thus saving cost, ...