Install the dust cover:
Take out the dust cover and put it into the laser tube’s light outlet.
If you feel that the interface is loose, use needle-nose pliers to lightly press the dust cover to make adjustments. Pay attention to the intensity of the adjustment, and try multiple times if necessary.
After the installation is complete, turn on the chiller to test. Make sure that the water in the laser tube is full and there are no bubbles. Then the laser beam will be emitted. (Please align the optical path before cutting.)