Principle And Structure Of Laser Marking Machine

Basic principle
Laser marking is to use laser beam to mark the surface of various materials permanently. The effect of marking is to expose the deep material through the evaporation of the surface material, or to "carve" traces through the chemical and physical changes of the surface material caused by light energy, or to burn part of the material through light energy to show the pattern and text to be etched
Composition structure
Laser power supply
The laser power supply of the fiber laser marking machine is a device that provides power for the fiber laser, and its input voltage is AC220V alternating current. Installed in the control box of the marking machine.
Fiber laser
The fiber laser marking machine adopts imported pulsed fiber laser, which has good output laser mode and long service life, and is designed to be installed in the casing of the marking machine.
Galvanometer scanning system
The galvanometer scanning system consists of two parts: optical scanner and servo control. The whole system is designed and manufactured using new technology, new materials, new processes and new working principles.
The optical scanner adopts a servo motor with a moving magnetic deflection working mode. It has the advantages of large scanning angle, large peak torque, large load inertia, small electromechanical time constant, fast working speed, stable and reliable. The precision bearing anti-backlash mechanism provides ultra-low axial and radial runout errors; the "electronic torsion bar" replaces the traditional elastic material torsion bar, greatly improving the service life and long-term reliability; the zero-power holding working principle at any position not only reduces the power consumption, but also reduces the heating effect of the device, eliminating the need for a constant temperature device; the advanced high-stability precision position detection sensor technology provides high linearity, high resolution, high repeatability, and low drift performance.
The optical scanner is divided into an X-direction scanning system and a Y-direction scanning system. A laser reflective lens is fixed on each servo motor shaft. Each servo motor is controlled by a digital signal sent by a computer to control its scanning trajectory.
Focusing system
The function of the focusing system is to focus the parallel laser beam on one point. The f-θ lens is mainly used. Different f-θ lenses have different focal lengths, and the marking effect and range are also different. The fiber laser marking machine uses an imported high-performance focusing system. The standard lens focal length is f=160mm, and the effective scanning range is Φ110mm. Users can select the lens model according to their needs.
The optional F-θ lenses are:
f=100mm, effective focusing range Φ65mm.
f=160mm, effective focusing range Φ110mm.
Computer control system
The computer control system is the control and command center of the entire laser marking machine, and is also the carrier of software installation. The workpiece marking process is completed through the coordinated control of the acousto-optic modulation system and the galvanometer scanning system.
The computer control system of the fiber laser marking machine mainly includes the chassis, motherboard, CPU, hard disk, memory bar, D/A card, floppy drive, display, keyboard, mouse, etc.