I'm not sure, but I think with an axis like this, the centre of rotation is set to the tip of the bit which makes it much simpler to control. I dont think you could do this with a gantry machine as the gantry would collide with the work piece. I think with gantrys the common solution is the one Coogrr sketched. The math for your idea would be quite complex and you would proberbly have to write the software yourself.
Please dont think I'm trying to pour cold water on your idea. I just want to make sure you know what you are getting into.
Paul |