There's not a lot of load so manually indexing a rotary table 142 times to cut a metal ring gear is tedious but only needs to be done once. After that with the rest in plastic you have the 4th axis. John
> -----Original Message----- > From: Matthew Herd [mailto:herd.m...@gmail.com] > Sent: December-20-21 2:11 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Harmonic Drive > > So I imagine it is possible to post-process a thermal plastic gear, but at > that point, maybe it�d be better to set up a gear skiving > machine to make the flex rings. If you can get the cutter and angle a rotary > axis with respect to the spindle, you should be able to do > it without much hassle. Has anyone considered that route? Obviously it > requires a rotary axis to make a rotary axis, but it really > doesn�t seem any more insurmountable and the results would probably be much > more precise. > > Matt > > > On Dec 20, 2021, at 4:56 PM, Chris Albertson <albertson.ch...@gmail.com> > > wrote: > > > > Is it possible to post process a thermal plastic gear? Lets say you took > > a high-precision metal gear and heated it to 180C and the rolled it over > > the printed gear with the correct center to center distance. You would > > need to build a test fixture to do this but might be worth it. > > > > lately I've been experimenting with brass thread inserts. I have 1/2 > > dozen different types and printed test blocks with different hole diameters > > and I've tried the soldering iron at different temperatures. The best > > results are really good with the M3 size screw failing before the nut. > > The worst case is they just pull out easily with pliers. > > > > The hard part seems to be repeatability and if the hole is parallel or at > > right angles to the layers. Printer setting and part design seems to matter > > a lot also. I've got a walking-dog type robot and I need to convert it > > all over to threaded inserts, about 80 places. I find it helps to think if > > each holes gets larger or smaller then design when it is printed. and this > > depends on ho the hole is connected to the rest of the part. By walls or > > sheets or infill.. Engineering is fun... > > > > > > > > -- > > > > 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 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
