[ivojnob]

I am kind of confused why you are persistent not using rack and pinions and must use ballscrews? I don't like it when people come in and just use blanket statements like these and assume that something is not worth using when they have no clue.
Sean

I agree with Sean. Sure ballscrews are good, but that's not what I'm using. I said in my second post that I have my R&P parts. That part isn't up for discussion. I'm looking for help building the best machine I can with the parts I have. 5 years ago I thought about using all thread and doing it cheap. I'm glad I convinced myself not to bother, and I'm pretty sure I can make a good machine with R&P drives. (wrong) Lots of other people have!