ok i am wanting to build a cnc router for cutting mdf and light aluminum.

my question is if i build a smaller machine out of mdf (12"x28" cutting size) out of mdf. will it be able to cut 3/4 aluminum if i do 1/32 passes?

the only reason for the small mdf machine is to make the actual machine.

also my gantry consist of .75 inch main supports on each side and my gantry beam is a 4x6 inch 1/4 inch wall beam. cutting table size will be 6'x10'.

if i use a good quality spindle and cutter i should be able to cut steel correct?