The influencing factor of laser cutter china quality - focus position adjustment. Since the density of laser power has a great influence on the cutting speed, the choice of lens focal length is also an important issue. The spot size after focusing of the laser beam is proportional to the focal length of the lens. After the beam is focused by the short focal length lens, the spot size is small, and the power density at the focus is very high, which is very advantageous for material cutting. But its disadvantage is that the depth of focus is very short, the adjustment margin is small, generally suitable for high-speed cutting of thin materials.
After determining which focal length lens to use, the relative position of the focus to the surface of the workpiece is especially important to ensure the quality of the cut. Since the power density is highest at the focus, in most cases, the focus position at the time of cutting is just right on the surface of the workpiece or slightly below the surface.
Therefore, ensuring a constant relative position of the focus and the workpiece throughout the cutting process is an important condition for obtaining a stable cutting quality. Sometimes the lens is heated due to poor cooling and causes a change in focal length, which requires us to adjust the focus position in time.
In most applications, the beam focus should be adjusted just below the nozzle. The distance between the laser cutter china nozzle and the workpiece surface is typically about 1.5 mm.
When the focus is in the best position, the slit is the smallest and the efficiency is the highest. The best cutting speed of the laser cutter china can get the best cutting result.