The working principle of the galvanometer of the UV laser marking machine

The scanning galvanometer is one of the indispensable core components of the UV laser marking machine. Its influence on the marking effect is self-evident. The understanding of the scanning galvanometer will help us to better operate the UV laser marking machine. Marking machine, today Xiaobian mainly introduces the working principle of the galvanometer of the ultraviolet laser marking machine.

High-speed laser galvanometer is a kind of digital scanning galvanometer used in the laser processing industry, and its professional term is called high-speed scanning galvanometer. It is the most widely used scanning method in laser scanning technology. It mainly means that the galvanometer motor drives the mirror to deflect, and then drives the laser beam to move on the scanning plane for scanning. The galvanometer motor is controlled by two motors, X and Y. The position of a point is determined at one time, and the position of different time points is controlled by the scanning frequency to achieve the transformation of the entire scanning pattern. The lower the scanning frequency, the more obvious the pattern, and the control of the galvanometer is the key to scanning into imaging. The traditional galvanometer control system is mainly controlled by the PC, and the control data is generated by the software and sent out through the interruption of the PC. However, due to the non-real-time system factors of the PC, it may cause the shortcomings of uneven scanning, low deflection angle accuracy, and high power consumption. This will also bring geometric distortion of the laser control system, which cannot meet the requirements of high precision, miniaturization, and low power consumption required by modern laser control systems.

The control principle of the galvanometer is mainly to control the galvanometer motor on the mirror to reflect the laser beam after the laser beam is incident on the two mirrors, so that the two mirrors can be Deflection along the X and Y axes respectively, so as to achieve the deflection of the laser beam, and then focus the laser with rated power density on the workpiece to move according to the required requirements through the FO lens focusing, so that the laser scans on the workpiece, and finally forms the expected The principle of the pattern is as follows:

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