That may be true, but 3d printer gantries are not built for the stresses of a dremel or cutting tool. First, you'll get loads of wobble. Normally cnc machines

That may be true, but 3d printer gantries are not built for the stresses of a dremel or cutting tool. First, you'll get loads of wobble. Normally cnc machines use a 2 smoothrod with a leadscrew in the center for strong stability and smooth motion. Once you turn on a source that spins in X000 rpm, it will send motion through the whole system. Secondly, once you start cutting anything stronger than foam, cutting will introduce shear forces on the gantry head itself. All 3d printers don't need to worry about XY rotational motion. That's usually a non-constrained degree of freedom. Third, you need to mount the piece you're cutting or it'll move (duh!). But tabletop vises are HEAVY. Your bed probably can't support it. The only bed I know that could would be a 3 point Z leveling bed. Those're rare. Feel free to try, and not take my word for it. But this has been attempted, and failed on many accounts. However, this would be a good place to try. And this tool is good up to alu cutting. https://all3dp.com/2/mostly-printed-cnc-mpcnc-all-you-need-to-know/ https://all3dp.com/2/mostly-printed-cnc-mpcnc-all-you-need-t...