Design for 1800x800x80 wood router

[jimbo_cnc]

Ah thanks, shimming the linear rail didn't seem quite right.

By shimming the main beam, I assume that means shimming an intermediate rail on the main beam.

My acetal rails plan would do the same thing, as long as the larger cnc has a flat bed. I'm not sure how my cnc place would feel about helping me make my cnc machine though! It's an obvious money loser for them.

I'm thinking now that a welded steel frame is making life hard for me. This is for wood mostly so an aluminium extrusion design might be more suitable. I quite like this design. It looks easy to move/install elsewhere which also makes it more re-sellable than a great big welded frame.

The question I need answering is: Can you just bolt a hiwin rail to an aluminium extrusion, and the result will be straight enough for wood panel cutting ?