1. 12 linear guide rails, 0.9 degree stepper motor and race driver are used to carve 2mm small characters clearly at the speed of 900mm / S; 2. With a new simple laser head, the structure is lightweight; Built in air pump; 3. The laser power supply is installed separately from other electrical parts, with strong anti-interference ability; 4. The rotating shaft is controlled by toggle switch, which is simple to operate; 5. The installation position of ground wire post and cover opening protection switch shall be reserved for each door to improve the safety of the whole machine;