Fix the emitter of the fiber laser. Don't fix it. Use an infrared upconverter to see if the laser is pointing at the center of the galvanometer inlet hole. If not, continue to adjust the fiber laser emitter until the spot enters the center of the galvanometer entrance hole. Fixed laser emitter. 2. Adjust the height of the galvanometer X. The goal is to make the center of the galvanometer X coincide with the spot of the fiber laser, and fix the galvanometer X. Note that the rotation direction of the galvanometer X is between the mirror X and the optical path. About 45 degrees. 3. Adjust the lift of the galvanometer Y so that the lens center of the galvanometer Y coincides with the center of the field lens, fix the galvanometer Y, and note that the rotation direction of the galvanometer Y is between the reflective surface Y lens and the horizontal plane About 45 degrees. 4. Using a point annular field lens center tester, place a frequency doubler in the center of the tester. After the light comes out, adjust the galvanometer X so that the green light point runs to the coaxial line in the center of the tester. 5. Adjust the galvanometer Y so that the green light point runs on the coaxial line of the center point of the tester, and then the green light point enters the center point of the tester. 6. After the on-site lens is installed here, the optical path adjustment of the fiber laser marking machine is completed. This adjustment is simple. From these methods, it can be seen that fiber laser equipment is the best guarantee for 100,000 hours of easy maintenance and trouble-free operation. The application of laser marking machines is becoming more and more extensive, and there are more and more users. Improper use of the laser marking machine will affect the normal operation of the laser marking machine.