First of all, very impressive! Is there a reason you didn't have higher belt tension? Thanks for that video. John
> -----Original Message----- > From: Chris Albertson [mailto:albertson.ch...@gmail.com] > Sent: June-10-20 8:15 PM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] Stupid CNC stunts. A 3D printed timing belt. > > There was a question on another thread: "I wonder if you can 3D print a > timing belt?" That I think was intended as a joke. But I thought it > sounded like such a dumb idea I'd have to try. So I did. > > I am converting a Harbor Freight Mini Mill to CNC and have now made all the > parts. Except for standard off the shelf hardware, all the parts are 3D > printed. I want to work out the easiest path for CNC conversion and then > publish it so as to allow more people to have CNC capability. So I'm now > assembling parts and needed a belt. I was able to make the conversion to > CNC with no machined parts. > > I fully expected the belt to fail as soon as I applied tension. It > didn't. Then I thought that as soon as I'd rotate the pulley the belt > would break. it didn't so I fired up LinuxCNC and ran the splash > screen forwards and backwords and got bored after it just worked about 8 > times back to front. > > About the belt. I went to the SPD/SI web site and found a 133T, 3mm pitch, > 9mm wide GT3 profile belt and clicked "download CAD file". I printed the > file with no modifications and using the defaults setting in Cura with PLA > plastic. PLA is a hard plastic not noted for being flexible. > > Below is a video of the belt in operation. It is also the very first time > this mill has moved under computer control. It is just the bare minimum of > parts installed for this stunt. The Z and X motors are laying flat on the > bench. The Z motor has a bad driver and is *very* noisy (and replacements > are out of stock). I placed a bit of blue painter's tape on the belt so > you can see it move. > > https://youtu.be/GPXICb9rSoE > > > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
