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Excuse my basic observation, but the literature claims the accurate positioning eliminates the need for "costly and complex split and dual pinion systems". I still imagine you would opt for rack and...

Bloy,

Concerning your CNC project, why are you opting for rack and pinion x-axis drive over ball screw? I suppose turning a long ballscrew requires a good bit of inertia, compared to rack and...

Now I see what you mean about the x-axis rack being protected from debris, nice design. I just read through this whole thread, and it has been great. I am interested to build a machine too, so great...

BTW, really nice job, and fascinating to read about your alignment problem. All credit to you to be able to make up these precise shims, that's the kind of stumbling block that can make or break a...

What are the dimensions of the THK rails you bought? I am looking at a set of rails 1300 mm long, x 20 mm x 15 mm.

Mícheál.

Ol' Dusty, we're all in the same boat! For two years I'm thinking about this project, but only came across this site last month. It has been an enormous help! The level of interest is encouraging. I...

Very impressive, I like your belief! Finally, it looks like you really can get some useful info from the web, just need to find the right sites. I'm planning to build my own, and money isn't really...

Wow! Amazing, thank you! Exactly what I wanted to see. This looks like a really good design. Do you think the two rollers are spring loaded to keep the belt taut? Have you designed your own machine?...

I am designing my own CNC router after two years of deliberation! Originally, I wanted to build one, then I wanted to buy one, and now I'm back to building one again. The reason is, for the large...