Milling slate. A test run. CAUTION. | MillRight CNC
slate milling machine. Newbie Routing Slate - CNCZone I have chosen 20mm honed slate for the sundial plate, The tool was a 635mm grinding burr, which gave a surprisingly clean cut, active discussion forum from DIY CNC Machines to the Cad/Cam software to run them [Slate Quarry Terms] (Not used much today).