I am a new to laser engraving/cutting machine. But as I know when we want to cut/engraving metal materials, we usually choose CNC cutting/engraving machines. Recently, I found a machine which is belong to laser system but can engraving metal also. The machine is called named, http://www.yorklaser.com/yag_laser_marking_machine.html
the following picture a sample finished by YAG.
I would like to know if I want to cut some metal materials, which will be better, CNC or YAG?