Laser welding machines are precision equipment, and maintenance to debugging are essential steps. Check the reference light source: The red semiconductor laser is the reference of the entire light path, and it is necessary to ensure its accuracy first. Debugging the output mirror orientation: Before debugging the output mirror, the concentrator cavity with the YAG rod should be removed to avoid the accuracy of debugging due to the refraction error of the YAG rod in the optical path. The precise orientation of the output dielectric diaphragm should be the exit hole where the red light is located at its base position and can fully reflect the red light back to the red light, otherwise it should be carefully adjusted through the knob of the diaphragm holder. Check the position of the shutter: manually rotate the reflective lens bracket, push the shutter to the light blocking position, and check whether the red light is at the base of the lens, and whether the reflected light is located on the absorption cone at the base of the beam terminator, if the position is not If it is correct, it can be adjusted a little. In the end, special attention should be paid to check whether the shutter reflector is cleaned or not. The contaminated lens will soon burst during use. At this point, some debugging operations of the laser welding machine are over. Check the installation orientation of the YAG rod of the laser welding machine: use the clear tape to stick the two ends of the YAG rod sleeve respectively, and check whether the red light spot is in the positive base position of the two rod sleeves. If there is any error, the concentrating cavity should be adjusted. The orientation is corrected.