Proxxon MF70 Mill to CNC with NEMA 17

thingiverse

Conversion of a Proxxon MF70 Milling Machine to CNC Operation with Arduino Uno and NEMA17 Stepper Motors. You'll need: First off, a little patience, since this conversion won't be done in just a few hours. 1 x Proxxon Micro Router MF70 3 x NEMA17 Stepper Motors with approximately 45NM Holding Force (e.g. Ebay # 114059862538) 3 x End Switches (e.g. Ebay # 111070309129) 4 x Axial Ball Bearings (e.g. Ebay # 251363904925) 3 x Shaft Couplings 5mm to 4.5mm (I made my own using aluminum rods and the FD150) 1 x Arduino UNO with CNC Shield and Drivers (Ebay # 274159362369) A Power Supply that delivers 12 to 20 Volts at a minimum of 5 Amps (my old wireless power supply works great) And, of course, a PC with software. I used GRBL and SerialComCNC for the first tests (https://www.mikrocontroller.net/topic/345380?page=8#6306227) and Estlcam for further steps (https://www.estlcam.de/). For the conversion: the cross table needs new holders at both ends, while the cranks must be adjusted to accommodate the stepper motors. For the cross table, four parts are used from a 3D printer, with the two end pieces available HERE (x and y endplate stl https://www.thingiverse.com/thing:4013033/files). The holders for the stepper motors in X, Y, and Z can be found HERE (https://www.thingiverse.com/thing:4528631). I also equipped my router with a Cyclone Vacuum Cleaner. The building instructions are HERE (https://www.thingiverse.com/thing:3263079), and it works perfectly. I printed using an Ender 3, at 0.16 and 33% Infill, don't forget to include support material! The nice side effect is that the Y axis of the MF70 Milling Machine also extends about 70 mm. The table overhang is not noticeable.