Pneumatic nameplate marking machine, also known as nameplate coding machine, nameplate coding machine, nameplate marking machine, nameplate numbering machine, and nameplate numbering machine, is actually a device for marking on a nameplate. This device is controlled by a computer and only needs to place the nameplate on the workbench of the equipment to complete the automatic printing. By inputting the content of Chinese and English characters and graphics to be printed into the computer, the computer marking software converts the content into digital control signals and transmits them to the controller, driving the printing needle to move along the set trajectory in the XY two-dimensional plane. At the same time, the printing needle performs high-frequency micro impact motion under the action of compressed air, thereby printing concave marks composed of dense dot matrix on the surface of the workpiece. If the printed text is magnified a few times, it is composed of dots, just like old-fashioned dot matrix printers.