I was designing a Cnc Bowling ball Driller. I have been sketching it up in autocad for afew weeks now. Id perfer 5 axis but i cant find any controllers for that. So im going with 4 axis. X/Y/A/B. Then i will control the drill bit debth my self.
I am not sure on which servo's / controller / software i should get yet.

Here is my design so far. Tell me what you guys think. BTW the peice the ball is sitting on in the picture turns for the B axis and the whole canapy pivits for the A axis. Then its sitting on a X,Y table.

All the holes in the canapy are for 1/4" all thread.

I will put it all in a large drill press or mill. I plan on using a vacuum device to hold the ball down. However i am unsure if this will have enough suction to hold the ball when the canapy is tilted up on large angles like 60 degrees.

Thanks,
http://images5.theimagehosting.com/cnc.jpg

When holes are drilled in bowling balls are they always perpendicular to the surface....it seems to me that they are not....

No they vary. I perfer to have some forward pitch on my finger holes and alittle side pitch on my thumb hole.