Thanks Sam, I have rewatched all your videos before I asked. You may have mentioned you used PETG but I missed it.
I do have a real Harmonic Drive like the one Andy has. If the rain here in BC ever lets up I'm finally ready to try casting the mounting frame for it. I'm also working on a face plate for it although am unsure if I want to include the South Bend Heavy 10L threaded nose so I can transfer the chuck from the lathe. Anyway, once it's operational I want to use my gear cutters to try and make a steel flex cup. Just for fun. Power drawbar project is on hold until 12 point socket arrives. John > -----Original Message----- > From: Sam Sokolik [mailto:samco...@gmail.com] > Sent: November-27-21 8:18 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Harmonic Drive > > I found that a while ago - That was what I initially started to build. > But the cup seems to not handle flexing. Atleast pla (I never tried it > with petg). When Andy mentioned the style with no cup - I went that > direction. I first made the flex gear out of pla - but it fatigued after > about 6 hours of running full speed (of the stepper). Which might be just > fine for a hobby 4th axis. Your not running the rotary axis at 100% feed > all the time. I bought a role of petg and printed a flex gear with it. > As much as I have run this setup (petg flex gear and pla splines) - I have > not had the petg flex gear fail - even after torque testing it. (although > I have not taken it apart) but it still runs and doesn't randomly stall. > > sam > > On Sat, Nov 27, 2021 at 10:05 PM John Dammeyer <jo...@autoartisans.com> > wrote: > > > For those who have 3D printed the gear portions of the harmonic drive what > > plastic did you find worked the best? > > > > Thanks > > John > > > > > -----Original Message----- > > > From: John Dammeyer [mailto:jo...@autoartisans.com] > > > Sent: November-26-21 11:18 PM > > > To: Enhanced Machine Controller (EMC) > > > Subject: [Emc-users] Harmonic Drive > > > > > > List has been quiet lately on the harmonic drive subject. I stumbled on > > this site. > > > > > > > > https://howtomechatronics.com/how-it-works/what-is-strain-wave-gear-harmonic-drive-a-perfect-gear-set-for-robotics- > > > applications > > > > > > John > > > > > > > > > _______________________________________________ > > > 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 > > > > _______________________________________________ > 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
