Opt Lasers PLH3D-XT-50 Manual page 12

On the other hand, the two following pictures below show how the beam looks like if it is
clipped (incorrect).
Case 2 - Nozzle Too Low
If the HP Nozzle is installed too low down, the beam will focus inside the nozzle. This
means that you will not get the highest optical power density:
- It will lower the speed at which your laser head can laser engrave and laser cut
- You will not be able to reach a small enough beam spot required to do Ultra HD
resolution laser engraving and laser cutting
In addition, it may also result in a ghost image.