Laser marking machine is a new type of marking processing equipment. Its internal structure is intricate. Laser, galvanometer, field lens, etc. are the core components of laser marking machine. The galvanometer scanning system consists of an optical scanner and servo control. The entire system is designed and manufactured with new technologies, new materials, new processes and new working principles.

The principle of the laser galvanometer: input a position signal, the swing motor (laser galvanometer) will swing a certain angle according to the conversion ratio of a certain voltage and angle. The whole process adopts closed-loop feedback control, which is combined by five control circuits such as position sensor, error amplifier, power amplifier, position distinguisher, and current integrator. The principle of the digital laser galvanometer is to convert the analog signal into a digital signal on the principle of the analog laser galvanometer. It has many applications in laser marking machines.

The basic structure of the vibration lens:

Composition: It consists of three parts: stator, rotor and detection sensor. Among them, the Shanghai galvanometer lens is a moving coil type (the rotor is a coil), and the others are dynamic magnetic type (the rotor is a magnetic core). All the galvanometer lenses are made of permanent magnets as the magnetic core. The digital galvanometer is a grating detection sensor. The capacitance sensor is a small change in the capacitance of the detection sensor when the motor is swinging. The change in the capacitance is converted into an electrical signal and fed back to the controller to perform closed-loop control. The grating ruler measures the actual deflection angle through the grating ruler, which is converted into an electrical signal and fed back to the controller for closed-loop control. The moving coil type is because the rotor is a coil, and the coil is relatively large in volume and large inertia, which is not conducive to rapid response, so it is basically not used now. The moving magnetic type is tightly mounted on the rotating shaft due to the hollow core cylindrical core, which has a small volume and a small inertia, so the fast response performance is very good.

Galvanometer in laser marking machine's galvanometer scanning marking because of its wide range of applications, vector marking and dot matrix marking can be performed, the marking range can be adjusted, and the response speed and marking speed are fast, The advantages of high marking quality, good optical path sealing performance, and strong environmental adaptability have become mainstream products, making laser marking machines have better marking performance.