Double Y Belt CNC Machine

thingiverse

Double Y Belt CNC Machine. **Finished!** I may edit/add some things in the future or on request. I might also upload more add-ons. I've designed this machine specifically for a double belt system, with upgradeability, flexibility and easy maintenance in mind. Double belts seemed like a solid concept to me, so i've recreated a design with additional support bearings to prevent the belt-rail from bending. The bottom belt is held in place with glue/double sided tape for minimal belt stretching. This build requires some wood sawing. Initial assembly can be a pain, so if you're not comfortable with that kind of thing, it's best to leave this project alone. I'm not responsible for faulty items or accidentally listing incompatible items. Here are the notes on the CAD model: » 1cm (extra) play on X & Y is not included in the model » Sliders have M8 threaded rods, but should have M10 » Wrong linear rail carriages » Half of the holes/carvings in wood panels don't have tolerance » Belts for X and Z are not present in the model, Y belts are short for better performance » About .f3d file: I've learned a lot with this project, some things are configured/modelled a bit weird and small changes may result in strange errors. Here's the list of parts: * 8mm 60T GT2 pulley * 6mm 188mm GT2 belt * 10mm GT2 Belt 7 meters * MGN12H carriages 2x * MGN12H rails & carriages 2x * Limit switches * Shielded wire +- 7 meters * Cable drag chain 3 meters * Spiral wire wrap Here's the changelog: 10/06/20 - Forgot tolerance Y stepper construction, more room for tightening eccentric nut, added pictures 20/06/20 - Updated description, added picture 24/06/20 - Added Hex nuts version of slider for extra strength, slider nuts are now inserted from the opposite side, updated .step file: working area is accurately marked 29/06/20 - Small adjustment of holes for switches on slider 02/07/20 - Removed the need for supports for the Y Cable Chain Mount Top, added Y Cable Chain Mount Top for 18mm side plates 20/07/20 - Forgot to add new holes from sliders to top plate. Design History cleanup. Uploaded .f3d file. Updated CAD files and description. 30/07/20 - I've just finished rebuilding the machine. New pictures and small changes will be processed/added in the upcoming month. I've found that the assembly process was quite different from the first time, so i have not been able to make a clear assembly guide (yet). Expect 'WIP' to be removed near the end of August. 20/08/20 - Diameter of z-axis bearing holder increased with 1mm - more room for pulley, small fixes, uploaded more file types, WIP removed, replaced some pictures 07/09/20 - Improved accessibility eccentric nuts at Y stepper constructions