I am looking to convert my sherline mill to cnc for the purpose of building some wooden clocks (among other things). The wooden gears can get quite large... so I'm thinking I need 4-axis so I can position the center of the gear flat on a rotary table and index the the rotation the distance of 1 tooth on the gear and then have a fine bit cut the shape of 1 tooth and then repeat for each tooth.

Here is a link to the provider of the clock plans I will attempt to reproduce. These plans are intended to be manually cut with hand tools and scroll saws and such.

http://lisaboyer.com/Claytonsite/videoplayer.htm

What do think?