FA series fiber laser marking machine is also called metal laser markingmachine . It is through the evaporation of the surface material to exposethe deep material , or through the physical changes of the surface materialcaused by the light energy to " carve " the traces , or through the lightenergy to burn off part of the material , showing the required etching patterns , words , bar codes and other graphics . Fiber laser has the advantagesof small volume ( no water cooling device , air cooling ) , good beam quality( basic mode ) , maintenance free and so on