Beyond using sturdy steel pipe/rods for the perimeter rails. What else are people doing to make their MPCNCs even more rigid?
Built a LowRider instead of MPCNC for some of the reasons being mentioned here. But there’s lots of MPCNCs out there though, am curious because MPCNC still seems like a good gantry setup for smaller CNC and other projects…
Is there enough gap/clearance on underside of the rails (between the truck bearing wheels) to weld a plate along the EMT, to help minimize rails flexing up/down?
If welding isn’t an option, is there enough clearance on underside of outer most exterior EMT rails to drill keyholes every 200mm or so (3D print a hold down alignment jig, then use stock MPCNC to very slowly drill keyholes). Then fasten bolts or threaded rod that connect to the table via 3D printed mount with captive bolt, that rotates to adjust height/tension, screw/bolt mount to the table. Something like MPCNC’s Z axis nut traps, but for perimeter rails. At some point, might be better use of time to buy a linear rail guide, design remix/mods would be needed though.
Noticed @Waspjr just created couple of topics with some ideas: