2. Many domestic manufacturers can't directly control the galvanometer driver, and the analog driver is relatively simpler. Therefore, most of the schemes adopted are to use analog driver card at the bottom and use XY2- 100 rpm analog control for data transmission, so as to realize the so-called "digital galvanometer" and apply for a patent accordingly. Of course, there are also several domestic manufacturers who can do their own digital driving, such as Hanhua Technology, which uses the SmartBus bus protocol to control the vibrating mirror.