How to cut a good sample with a laser cutter?
How to cut a good sample with a laser cutter? Since the laser power density has great influence on the cutting speed, the selection of focal length of lens is an important problem.After focusing the laser beam, the size of the spot is proportional to the length of the lens focal length. After focusing the beam through the short focal length lens, the size of the spot is smaller and the power density at the focus is higher, which is favorable for material cutting.But its disadvantage is short focal depth, small adjustment margin, generally more suitable for high speed cutting thin materials.As the telephoto lens has a wider focal depth, as long as it has enough power density, it is more suitable for cutting thick workpiece. After determining which focal length lens to use, the relative position of the focus and the workpiece surface is particularly important to ensure the cutting quality.Due to the high power density at the focus, in most cases, the focus position is just ab...