Similar to CNC Routing, laser engraving allows us to mark a wood surface with extreme precision. Typically with routing we cut hrough the wood completely. Laser engraving is the modern day equivalent of etching wood with a hammer and chisel.
The type of material being engraved, and the power level of the laser determine the maximum engraving depth and speed of engraving. Usually shallow engraving is faster than deep engraving. Higher density materials take longer to engrve, than lesser dense materials.