Mini EGG - Benchtop CNC Mill with Epoxy Granite Frame

Note: This is a work in progress. Small benchtop CNC design with an epoxy granite cast frame similar to the FS3MG frame. Designed to cut aluminum, not steel. Specs: Travel: 240x240x120mm (probably be smaller after adding stops, covers, etc) Epoxy granite frame: 70mm thick, 400mm cube, no metal inserts to mount rails Spindle: 220V, 2.2kW, VFD Linear rails: Chinese HGR20's Stepper motors: NEMA 23, 2.4Nm (340oz-in) Ball screws: Chinese SFU1605 Belts: GT2, 3mm pitch, 9mm wide, 2:1 ratio Mounting plates: 15mm MIC6 Aluminum. Stepper motor mounts are just 6mm rolled Al. Control board: BigTreeTech Scylla (with integrated TMC2160 drivers)