How to make the frame exact

[signIT]

I wonder about how to make a frame for the linear slides that are exact in measure.

What I mean is if the frame is a little bit offset i may make the linear slides a bit hard to move when the gantry is mounted.

Even a small tension can be a big problem how does the professionals make a frame that have high precision.

I think that a steel frame that is assembled with bolts is the best.

Can any give me a good construction information.

[ger21]

If you build it out of steel, here is some info on how to get it VERY flat.
http://www.lmwatts.com/straightedge.html

[berin]

http://cnczone.com/forums/showthread...3012#post33012
Here is a post of mine which tells how to make a straight rail alignment. post number 25

[kanankeban]

Originally posted by ger21 If you build it out of steel, here is some info on how to get it VERY flat. http://www.lmwatts.com/straightedge.html

Gerry,
It will be great if you could help us out with some visual content in the explanation on how to get flat surfaces, Sorry I read it several times but I can't get it right.
Regards...
Hector

[ger21]

I didn't write it, and I'm not sure if I've ever even read the whole thing.

[signIT]

I have an idea I will mount my THK rails on a thin wall square steel tube using soft metal shims that should take up some missalignment in the steel surface, also the thin tube steel will help a lot to hold the rails straight and flat or...?