It is my first post, so at the beginning I'd like say hello for everybody .
I'm working on cnc machine (my first) for milling a steal. All construction is made of steal profile 8mm. My question is if centre of gravity of my machine is correct.
CNC.jpg - Rozmiar oryginalny - Fotosik.pl
There is no rigid rule as to where the COG should be. Generally - the lower the better. You can always fill the base with sand - some professional machine tool makers do that. However, it will not help if the column is not rigid.