Difference between Laser Cutter and Laser Engraver
The lens focal length is shorter in thelaser engraving machineto give a fine spot size when working on materials. This gives a higher quality when engraving , such as photographic images.
The longer focal length lens onthe laser cutting machines is more tolerant of focus height variations, and produces less taper in the cut edge. This is more relevant for cutting thicker materials, where a cutting lens would reduce the angle of laser cut sloped edges. This would only usually be apparent on materials with a relatively large depth to them.