I've been using a benchtop CNC mill (R8 taper) for a number of years as a hobby. The vast majority of my operations are profile cuts, pockets, and hole drilling in aluminum that's, at most, .25" thick, and MDF that's, at most, .5" thick. I never need more than .005" accuracy, which the mill easily provides. The machine offers 14" of X travel, 6" of Y, and 9" of Z. I use a number of software tools for design, but they all end up outputting G code which I run in Mach 3 to drive the machine.
I'm often constrained by the mill's work envelope and find myself increasingly thinking about replacing the mill with a CNC router, which would give me a significant increase in Y travel within the same footprint as the mill. It would also process MDF much faster. I don't know much about these routers, though, so I thought I'd come here to gather some pros and cons. Would it be able to do all the things I mentioned I currently do with my mill? If I ever wanted to work on steel, would I be able to (I assume I'd have to add a coolant system, but Fog Buster seems like it would be well-suited to one of these things)? Any other considerations? Thanks for any tips.