Transport mechanism of action is to be passed to the input patch PCB SMT specified location, and will finish the PCB mount components and send the output from the SMT surface mount technology to set up each of the next to go, when performing when the incoming PCB, which have a precise mechanism X, y and Z-axis positioning, in order to complete the accurate positioning, placement machine reference point set specifically set up for the visual system of the body to complete the visual positioning. Pictured Most transport mechanism design.