There is an incremental switch on the robot teaching device, as shown in figure 1. Turning on the increment switch can realize the micro-control of the movement of the hand-controlled robot, that is, the adjustment of the running speed of the robot can be realized.

Robot is an intelligent machine that can work semi-automatically or fully automatically. The earliest robot in history can be found in the puppet robot that the emperor ordered craftsmen to create according to Liu's image. It has the ability to sit, get up, worship and squat. Robots have the basic characteristics of perception, decision-making and execution. They can assist or even replace human beings to complete dangerous, arduous and complicated work, improve work efficiency and quality, serve human life, and expand or extend the scope and ability of human activities.