... , microcomputer constant voltage control system... Escalator pedal automatic welding machine, welding the pedal of Escalator in supermarket Full set of equipments ... spot fastness, and can be set 10 sets of welding standard, each welding standard can execute 100 steps, simple operation, high ... MCU control, simple operation, just need install the workpiece, full automatic welding ,Welding length 1500mm.