I own up to lurking on this site for some months without posting, problem is you guys have answered all my questions without me even having to ask, I just searched and the answers were all there. (too many experiences with other forums where you ask something and some bright spark jumps on you telling you to search before asking) but I now know you lot are different!
I've built up something that works reasonably well, you can probably tell who was the inspiration...thanks Joe.
I thought I would let everyone know what hardware I used so people(especially in the uk) know it all works together... we dont have the same amount of choice this side of the water
All bearing slides are from Joes design, leadscrews are 12mmD 3mm pitch from Marchant Dice, controllers are these:- http://www.stepmasternc.com/stepmasternc_006.htm
and steppers are 260 oz from Motion Control Products.
I'm using two atx power supplys to give 24v at the moment.
I've got too say I've been pretty lucky with no real problems with anything purchased so far (thats done it!) and I'm forunate in that I work for a joinery company and we throw out enough mdf every week to make half a dozen of these so I dont struggle for material. It does work, but its sort of thrown together so I can use as a sort of test-bed until I find the best way to do everything. I've allready decided I'm going for bigger motors fairly soon and must get a better power supply but at the moment its doing what i want while i learn.
Just cutting a circle to test for accuracy-
http://www.youtube.com/watch?v=pZ0voW7iTeI