Step 1: Adjust the laser current of the engraving machine to less than 5, so that the laser power is not too strong;
Step 2: Put the dimming paper in front of the first lens, lightly press the test switch with your hand (release it immediately, you can see the spots made by the laser on the dimming paper), and see if the spots fall on on the first lens (preferably the middle), if you can find a lens, this is done. If you cannot hit the lens or it is misaligned, you need to adjust the position or height of the laser tube so that it can meet the above standards.
Step 3: Adjust the optical path between the first lens and the second lens. First put the laser paper in front of the second lens, push the guide rail to the position (a) in the picture and click a test switch to see the position of the spot. Next, pull the guide rail to position (b) and also click the test switch to see if the positions of the two spots coincide. If it is coincident and the spot position is within the lens, it means that the optical path between lenses 1 and 2 is correct; if not, you need to adjust the adjustment screws on the frame behind lens 1 to adjust the two points together.
Step 4: Adjust the optical path between lenses 2 and 3. First push the laser head to the position (c) in the picture, and put the dimming device in front of the small hole of the laser head / lightly press the test switch to see the light class, then push the head to the position (d), and press it again, test the switch to see if the two marks overlap. If they overlap and the two spots are within the small hole of the laser head, the optical path is correct. Note: The principle of optical path adjustment between lenses 1, 2 and 2, 3 is the same.
Step 5: Adjust the optical path between lenses 3 and 4 (key step). First remove the lens, put the light paper under the laser head and click the test switch to see if the light spot hits the dimming paper in the middle. If it is exactly in the middle, the optical path is positive; if the spot is to the right, the laser tube is too low; if the spot is to the left, the laser tube is too high; in these two cases, it is necessary to adjust the height of the laser tube to solve. If the light spot is inward or outward, you need to adjust the optical path by moving the position of the laser head (there are three screws on the laser head, through which the inside and outside of the laser head can be adjusted).
Step 6: Install the lens, and the adjustment of the optical path is completed.