Seal the traditional percussion method, often resulting in crooked fonts, shades, and low efficiency. For a long time, how to improve quality has always been plagued by signs of engineering and technical personnel of industrial enterprises. Pneumatic marking machine (aka computer stylus cutting plotter) although to engraving, but its high price allows the many signs discourage a small number of SMEs. I plant development and design of the sign parameters completely solved Unit hit the defects, and low prices, a product launched on the market has been widely recognized.