Hi there

I just assembled a 3 axis wood cutting cnc machine. But I have some problems with my X axis.

My question is, What would be the best way to level the surface in order to install my rails?

I have a 200 cm - 4" by 4" Square Tube for my each Rails.

I know I could weld a Flat Bar on each of my Tube and then sub it same level, But I just do not know how to do it?

Do I need a laser level ? please explain. and if you have a video on this issue of how to exactly level it and then sub it would be great.

Regards
Johnansaro