Hello
I'm working on my first machine, and I decided to use hardened rods for the rails of a 36" x 18" x 6" gantry router. I' planning to use tapped rods, they come on 16 and 20 mm diameters with holes every 10", on www.vxb.com
What considerations should I take to select the size of the rods? I understand about the flexing under load, but with support every 10" it shouldn't be a problem (??). Is there any other reason to use larger diameter?
Thank you