On Wed, 1 Dec, 2021 at 5:51 PM, John Dammeyer <jo...@autoartisans.com> wrote:
To: 'enhanced machine controller (emc)' >How about. Now it works. I can load the assembly but the embedded read only >characteristic is just plain rude. So the work around with Alibre is as >follows: Import the .step file. >Select one of the elements like "Housing" and right click to open in separate >window. >Doesn't matter what you do to the drawing you can't change it but it can be >exported >as an .IGES file. >So now I have "Housing.igs" and can import that and then save as the >"Housing.AD<http://Housing.AD>_PRT" >It's still a clumsy step file type of import that doesn't have the same ease >of use >editing that parts built with Alibre have but at least it's editable and some >of the very >poor features of the design can be changed. I looked at Alibre but the learning curve was too steep for my elderly brain, so I taught myself how to use OpenSCAD, and designed mine in that. But it doesn't import too much else, more intended for new designs. It is different, and simpler but can do a pretty good job. >John Take care and stay well John > -----Original Message----- > From: Chris Albertson > [mailto:albertson.ch...@gmail.com<mailto:albertson.ch...@gmail.com>] > Sent: December-01-21 1:18 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Harmonic Drive > > Thanks for the link. But I noticed there was a STEP file provided. I've > imported it into Fusion360. It imports well. No need to convert the STL > files. > > Here is a view-only public link to the Fusion360 model. > https://a360.co/3phrfI6 > I've made no edits to the above. simply did the import. > > The model could use some reorganization. It is just a linear list of parts > with no hierarchy but unlike STL files the exact shape of the parts is > preserved. > > Thanks again. > > Chris > > > > > > > > > > > On Wed, Dec 1, 2021 at 9:33 AM John Dammeyer > <jo...@autoartisans.com<mailto:jo...@autoartisans.com>> wrote: > > > Chris, > > > > This was my starting point. The step files aren't available in that > > link. The STLs have been converted although some badly. Still working on > > getting better step files from STL. > > > > > > https://howtomechatronics.com/how-it-works/what-is-strain-wave-gear-harmonic-drive-a-perfect-gear-set-for-robotics- > applications/ > > > > I don't have the larger 47x35 bearings yet so I subbed in a 47x20. > > Without two bearings there will always be a bit of wiggle there. I found > > only two of the 5x16x5 in my random bearing box. I have 10 of those on > > order too. For now I recreated the wave generator to just use two > > bearings. > > > > I have a tube of 11mm bearings that when doubled up (or maybe not) can be > > put closer together creating less of a point source bend that the single > > bearing does. That might fatigue the plastic less. > > > > Also turning the hub that goes through the bearing out of metal and making > > the companion mounting plate for the cup out of metal would allow a coupler > > shaft through from the wave generator disk to the centerline of the drive > > bearing. This would likely also clean up any wobble from thin printed > > plastic. > > > > John > > > > > > > > > -----Original Message----- > > > From: Chris Albertson > > > [mailto:albertson.ch...@gmail.com<mailto:albertson.ch...@gmail.com>] > > > Sent: December-01-21 9:13 AM > > > To: Enhanced Machine Controller (EMC) > > > Subject: Re: [Emc-users] Harmonic Drive > > > > > > John, > > > > > > Looks like I'm finding this thread late. Where are the design files for > > > this harmonic drive? > > > > > > On Tue, Nov 30, 2021 at 11:22 PM John Dammeyer > > > <jo...@autoartisans.com<mailto:jo...@autoartisans.com>> > > > wrote: > > > > > > > I've added a photo. > > > > www.autoartisans.com/harmonicdrive/HarmonicDrive-8.jpg > > > > > > > > The new wave generator pieces puts the bearings 1mm further out. Was > > also > > > > able to bring it a bit closer to the motor so the bearings now sit in > > the > > > > middle of the fixed spline gear. > > > > > > > -- > > > > > > Chris Albertson > > > Redondo Beach, California > > > > > > _______________________________________________ > > > Emc-users mailing list > > > Emc-users@lists.sourceforge.net<mailto:Emc-users@lists.sourceforge.net> > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net<mailto:Emc-users@lists.sourceforge.net> > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net<mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net<mailto: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
