Stell frame cnc 1500X1000. Adjustable table your opinion please

[EddyCurrent]

Vagelis,

I am an amateur like yourself but have recently read a lot of information about cnc machines. I am designing a frame myself at the moment using 50x50x3 steel box section, my work area will be about 1000x650.
You see where you have two crosses in the side panels, I think if you had just 2 diagonals like this I/I\I it would be enough because you just need to create a triangle. For your size machine I would say the 80x80x5 might be more than you need but if you are fine with that then more is better than less. The I beams I would change for box section because I beams are not so good with twisting and you might get more sideways twist than you would with box section. Also you have not put any diagonals at the ends like you did with the sides. Good things you have included are 3 legs each side, adjustable feet, adjustable top I beam to get the top surface straight. Looking at the drawing, I can't see much adjustment on the brown angle and wonder if it's worth it other than making sure the table is the same height under the cutter across all of the table.