Laser marking machine marking head ( Scanning head) The principle of

At the heart of the laser marking machine is laser marking and laser marking control system, therefore, the development of laser marking machine is laser marking control system and the development of the laser marking head. Since 1995, in the field of laser marking machine has experienced a sharp surface, transit time and the galvanometer era, the control mode is completed from direct control to the upper and lower position machine control software to a series of evolution, real-time processing, time-sharing multiplexing today, semiconductor laser, optical fiber laser machine, and even the emergence and development of ultraviolet laser machine and puts forward a new challenge of optical process control & ndash; — The galvanometer laser marking head - The galvanometer scanning system) Is the latest product. In 1998, the galvanometer scanning system in China, the large-scale application of began to come. So-called galvanometer, can be called a current meter gauge again, its design thought completely follow current meter, the design method of the lens instead of the clock, and the probe signal - controlled by the computer 5V— 5 v or - 10 v - + 10 v dc signal, to complete the scheduled action. With mirror scanning system, the typical control system USES a pair of turn-back mirror, the difference is that drive the lens of the stepper motor is replaced with servo motor in the control system, the use of the position sensor and negative feedback loop design can guarantee the accuracy of the system further, the scanning speed and repeated positioning precision of the whole system to achieve a new level.



the galvanometer scanning marking head is mainly composed of the XY scan mirror, field lens, vibration mirror and marking software of computer control. Its working principle is to laser beam incident to the two mirrors ( Scan mirror) With computer control mirror reflection Angle, the two reflectors respectively along the X, Y axis scanning, thus to achieve the laser beam deflection, that has a certain power density of laser focus on marking materials according to the requirements of the movement, thus permanent mark on the material surface, focusing of light can be circular or rectangular, its principle as shown in the figure below:



in the galvanometer scanning system, can be used in a vector graphics and text, the method utilizes the graphics on computer graphics software in the way of processing, construction with high efficiency, good graphic precision, without distortion, etc, greatly improve the quality of the laser marking machine and speed. Vibration mirror at the same time marking matrix may be adopted marking way, in this way is very suitable for online marking, according to the production line of different speeds 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.



the galvanometer scanning marking because of its wide application, can be vector marking and lattice marking, marking range adjustable, and has fast response speed, high marking speed ( MTK is marking every second hundreds of characters, our LMD/YAG laser marking machine marking speed up to 1000 characters per second) , high marking quality, good seal performance, strong adaptability to the environment light path advantages has become a mainstream product, and is believed to represent the future development direction of laser marking machine, has a broad application prospect.