The SMT pick and place machine is actually a precise industrial PCB pick and place robot, which is a combination of machine-electric-optical and computer control technology. It fastly and accurately places SMC/SMD components on the specified pad position on the PCB board without damaging the components and printed circuit boards through functions such as suction-displacement-positioning-placement. There are three ways of component alignment: mechanical alignment, laser alignment, and visual alignment. The SMT electronics pick and place machine is composed of a rack, an x-y motion mechanism (ball screw, linear guide, drive motor), a placement head, a component feeder, a PCB carrying mechanism, and a device alignment detection device, and a computer control system. The movement is mainly realized by the x-y motion mechanism, the power is transmitted through the ball screw, and the directional movement is realized by the rolling linear guide motion pair. The placement position accuracy of each component is guaranteed in this way.