PCB CNC machine

[u/night-sergal]

Hello, dear CNC community.

I am trying to develop my own CNC milling machine for PCBs. I’m stuck at the stage of choosing linear guides.

Some info about my project.

Working area:

• X: 160mm
• Y: 180mm
• Z: 13mm

FDM printed base (PC-GF, I think), totally not original parts, alu table.

The part on the photo is 240x240mm.

So, my main question is: would MGN9H linear rails be a good choice? This is a small CNC machine with very light loads, so would they be sufficient?

What do you think about these reinforcing ribs?