Quote Originally Posted by fotch View Post
That is what the geared rotary table is for, the board is clamped to it, then the table rotates slowly, as the mill cuts the whole. Probably easier to understand for those who have a milling machine.
I was assuming that you were securing the board with a single bolt through the middle. Without a piece of waste under the board, as the cutter finishes cutting the hole it will (a) score the rotary table and (b) cause the outside of the board to come loose and get torn by the cutter. Been there, done that.

That's the manual rotary table; get the CNC rotary table and your dreams will be in TechniColor

Charley