Originally Posted by Mustafa Umut Sarac
CNC machines can get ultra precise results. It depends on the speed of your spindle. 18000 revolution is enough to shape any desired strange curves on to lens.
Mine runs up to 40,000 rpm but if you run too fast you will melt the material you are trying to cut.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.