Generally speaking, the function of the focusing mirror of the laser cutting machine is to focus the beam. These focal points can be adjusted and are not fixed. Some focus automatically and some focus manually. Then, how to adjust the optical fiber focal length of the general laser cutting machine?
Each lens has its own focal length, but most of the differences are not very large. After the focal length is determined, you should first grasp the focus, find the focus on the lens, and then adjust the focal length according to the actual quality during processing.
The focal length of the focusing lens of each laser cutting machine is different. The focal length of the focusing lens of the general small laser cutting machine is basically 50.8MM and 63.5MM, which is actually the distance from the focusing lens to the material. You can use a steel ruler to measure the height of the lower lens.
When the optical fiber focus of the laser cutting machine is in a good position, the best cutting result can be obtained with the smallest kerf and the highest efficiency. Different laser focus positions correspond to different roughness of the cutting surface. The adjustment of the focus position for optimizing the cutting quality of the optical fiber laser cutting machine is determined from the situation that the cutting focus is located in the cutting material.
It is very important to determine the focus position of the laser cutting machine fiber according to the actual situation. Only a reasonable focus position can maximize the use of laser energy and make the laser cutting machine fiber work more reasonably.