What are the acceptable materials that I can cut?
The machines on this site can cut a wide variety of materials. If there is an end mill (cutting bit) that is available on the market, the machine can cut it. The thickness is only limited by the end mill length. This is possible with these CNC machines and other machines on the market because the machines can be controlled in such a way that the material can be cut using depth per pass, feed rate, and spindle RPM.