Printed CNC machine

thingiverse

UPDATE on 27.01.19 1) ABS wheels are not the best option. Tested different filaments (ABS, PLA, TPE, TPU, Rubber, Nylon), and nylon appears to be the best choice. 2) A 20x60 rail for the X-axis is too soft for milling; a 40x60 rail is the optimal option. It's been tested, and parts will be added soon. 3) Belt drive: fast, easy, but not accurate or strong enough, especially with NEMA17 motors that have low torque. Screws are currently being tested and appear to be a much better option, even though they're not as fast. After disassembling my MPCNC, I obtained a large quantity of 608 bearings and screws, which I wanted to use in another CNC machine. Therefore, I decided to build my own router, which can be easily updated. I spent many days thinking about how to achieve what I want, and eventually made plans for the first version of this machine. https://youtu.be/HZGdXFKRHZs In total, it will take approximately 1kg of ABS filament. In the current iteration, I used: V-slot extrusion for the frame: - 4 pieces of 20x20mm x 960mm - 2 pieces of 20x20mm x 920mm - 4 pieces of 20x20mm x 250mm - 2 pieces of 20x60mm x 1000mm - 1 piece of 20x60mm x 936mm - 1 piece of 20x60mm x 300mm 22 pieces of 608 bearings, 3 meters of GT2 belt, 3 pieces of 16-tooth 5mm axle GT2 gears, 4 NEMA17 steppers, 1 piece of a 500w spindle. Screws, washers, and nuts will be added later. For better angles, you may want to order 15-20mm MDF or plywood to place inside the bottom of the machine. I used printed v-wheels with double bearings for the upper rollers and single bearings for the lower ones. Levers are used for wheel tightening; eccentrics are not needed. Large spacers are inserted between the carriage and wheels, while small spacers are placed between bearings in the double wheels.