Re: XYZ TABLE

I think you will get a lot of different answers to this.

My opinion is that many people will use what is free to get a start
on a project. Why spend the bucks when you could get it up and
running with what you have?

Second, accuracy. ground stock will be more accurate than the
surface of your CRS stock.

Linearity. your CRS will not be as straight over distance as
expensive ground linear rails.

but, you didn't mention what you want to do.
make certifiable aircraft parts ? ain't gonna happen !
make neat wood carvings ? fine.

and from my recent checking into plasma tables, seems an inverted
angle with bearings on the CRS is the way to go. And that is not too
much different than your approach.

My suggestion is to go for it. but, before you complete your design,
see if you easily substitute those expensive linear rails. that way,
if your needs change and you find you require them you don't have to
cut everything apart to switch.

Dave

--- In CAD_CAM_EDM_DRO@y..., "zemenz2003" <PAULTOMKIN@R...> wrote:
> Has anyone tried building a XYZ table just using cold rolled
rectangle
> steel one inch squared and have 1,250 diameter radial ball bearings
> roll on the cold rolled rails? The bearings would be on top and the
> sides with one bearing per side spring loaded to compensate for
> unparellelisium. This is great for a large span of travel instead
> of fixed bearings. Or am i just re inventing the WHEEL? If the
> bearings were free, is that better than buying liniear bearings and
> doing a job that could last 100 times longer?
>
>
> Yours truly re inventing the wheel John Mars