The Application of Galvo Scanner in marking
The galvanometer scanning marking system is mainly composed of a laser, an XY deflection mirror, a focusing lens, a computer, and the like. The working principle is that the laser beam is incident on the two mirrors (galvanometer), using computer control mirror reflection Angle. The two mirrors can be scanned along the X and Y axes respectively, thereby achieving the deflection of the laser beam, so that The laser focus of a certain power density moves on the marking material as required, leaving a permanent mark on the surface of the material, which can be circular or rectangular.
The lasers used for marking are mainly Nd:YAG lasers and CO2 lasers.
YAG laser is well absorbed by metals and most plastics, and its short wavelength (1.06 μm) has a small focusing light spots, making it ideal for high-resolution marking on materials such as metals.
CO2 lasers produce lasers with a wavelength of 10.6 μm, which are well absorbed by wood, glass, polymers and most transparent materials, making them particularly suitable for marking on non-metallic surfaces.
In the galvanometer marking system, vector graphics and text can be used. This method adopts the processing method of the graphics software in the computer, which has the features of high drawing efficiency, good graphics precision and no distortion, and greatly improves the quality and speed of laser marking. The quality and speed of laser marking. Simultaneous galvanometer marking can also be used in dot matrix marking. Vibration mirror at the same time marking matrix may be adopted marking way, in this way is very suitable for online marking, depending on the speed of production line can use one or two scanning galvanometer scanning galvanometer, compared with the array type marking described earlier, you can mark more lattice information, to mark Chinese characters has more advantages.Due to its wide range of applications, galvanometer scanning marking can be used for vector marking and dot matrix marking, with adjustable marking range, fast response speed and high marking speed (a few hundred characters per second can be marked) The advantages of high marking quality, good optical path sealing performance and strong adaptability to the environment have become mainstream products, and are considered to represent the future development direction of laser marking machines, and have broad application prospects.
