Eight-speed button operation driving circuit

The eight-speed button operation driving circuit is shown in the figure. 1KM and FT are installed in the workshop distribution box, the circuits below FT are installed on the driving vehicle, 8 buttons including STP, ST, 3ST~8ST are installed on the driving cab panel; the travel limit switches 3SA~8SA are installed on the driving track superior. 3SA ~ 8SA are inching buttons, which control the AC contactor 3KM ~ 8KM to make the motor run 1M ~ 3M to achieve up, down, left, right, forward and backward movements, and automatically stop when the vehicle reaches the limit point.