If the platform position is too low after focusing, please ensure that the material is flat and not warped. If the material rises too much, make sure that the material is not transparent.

If the focal length is still not accurate, you can manually adjust the height of the laser head (as shown in the figure).

After the autofocus is complete, loosen the tightening screws of the lens barrel and the Lens Holder. Use the focusing gauge to determine the correct position of the laser head, then tighten the fixing screws of the lens barrel. Finally, move the Lens Holder upward until it makes contact with the top. Tighten the screws of the lens holder.