Laser scanner laser galvanometer for laser marking machine
Laser scanners are also called laser galvanometers, which consist of X-Y optical scanning heads, electronic drive amplifiers and optical mirrors. The signal provided by the computer controller drives the optical scanning head through the driving amplifying circuit, thereby controlling the deflection of the laser beam in the X-Y plane.
In the laser demonstration system, the waveform of the optical scanning is a vector scanning, and the scanning speed of the system determines the stability of the laser pattern. In recent years, high-speed scanners have been developed that can scan at speeds of up to 45,000 points/second, thus enabling the demonstration of complex laser animations.
Scanning principle: The scanning pattern is a two-dimensional effect pattern, so the scanning motor is controlled by two motors, X and Y, and the position of a point is determined at one time. The lower the speed), the more obvious the pattern flickering, which can be understood in the principle of film.
product description:
The galvanometer is simply a scanning galvanometer used in the laser industry, and its professional term is called the high-speed scanning galvanometer Galvo scanning system. The so-called galvanometer can also be called ammeter. Its design idea completely follows the design method of ammeter. The lens replaces the needle, and the signal of the probe is replaced by the computer-controlled -5V-5V or -10V-+10V DC signal. , to complete the predetermined action. The same as the rotating mirror scanning system, this typical control system uses a pair of folding mirrors. The difference is that the stepping motor driving the mirror is replaced by a servo motor. In this control system, the use of a position sensor And the design idea of negative feedback loop further ensures the accuracy of the system, and the scanning speed and repeated positioning accuracy of the whole system reach a new level.
Laser marking machine galvanometer:
Galvanometer scanning marking head is mainly composed of XY scanning mirror, field mirror, galvanometer and computer-controlled marking software. The corresponding optical components are selected according to the different laser wavelengths. Related options also include laser beam expanders, lasers, and more. Its working principle is that the laser beam is incident on two mirrors (scanning mirrors), and the reflection angle of the mirrors is controlled by a computer. The laser focusing point of a certain power density moves on the marking material according to the required requirements, thereby leaving a permanent mark on the surface of the material. The focused spot can be circular or rectangular. The principle is shown in Figure 1. In the galvanometer scanning system, vector graphics and text can be used. This method adopts the processing method of graphics software in the computer, which has the characteristics of high drawing efficiency, good graphics accuracy and no distortion, which greatly improves the laser beam quality. Quality and speed of marking. At the same time, the galvanometer type marking can also use the dot matrix marking method. This method is very suitable for online marking. According to the production line of different speeds, one scanning galvanometer or two scanning galvanometers can be used, which is the same as the previous one. Compared with array marking, it can mark more dot matrix information, which has greater advantages for marking Chinese characters. Due to its wide application range, galvanometer scanning marking can be used for vector marking and dot matrix marking, the marking range is adjustable, and it has fast response speed and high marking speed (hundreds of characters can be marked per second) , high marking quality, good optical path sealing performance, strong environmental adaptability and other advantages have become mainstream products, and are considered to represent the future development direction of laser marking, with broad application prospects.
Laser galvanometer application:
In short, the galvanometer system is a high-precision, high-speed servo control system composed of a drive board and a high-speed swing motor. It is mainly used for laser marking, laser engraving, stage lighting control, and laser drilling.
