Talk:Cycloid gear

Dedenda of pinion teeth in timepiece gears
I believe that the diameter of the generating circle used for generating timepiece cycloidal gear tooth profiles is commonly equal to the radius of the pinion pitch circle as this results in straight radii for the dedenda of the pinion teeth. —Preceding unsigned comment added by 71.212.91.26 (talk) 21:08, 4 March 2010 (UTC)

Confusing
This article doesn't have any pictures, and it's hard to know what a cycloid gear is unless you know some pretty advanced geometry or have already seen such a gear yourself.RSido (talk) 01:30, 9 July 2013 (UTC)

Self evident
Much of the lack of citation and term definition, lack of pictures etc ask for more, but the below portion immediately preceding the request for citation is the one self evident portion. Perhaps term definition helps, perhaps the request for citation belongs elsewhere. "simple straight radial line. This is simple to polish, and the lack of any undercut strengthens the tooth." — Preceding unsigned comment added by 108.20.1.168 (talk) 14:08, 16 December 2018 (UTC)

Cutter generation
I've added https://www.youtube.com/watch?v=dCeBCR0-lr0 to the external links, the video references a text (Robert Porter's "The Clock & Watch Makers Guide to Gear Making") which I have not been able to review but all in all appears useful.

My understanding is that traditional workers approximated the cycloidal form using multiple radii, which makes the cited approximation by a single radius plus a flank angle arguably crude. However My feeling is that this goes into sufficient detail on the tooling etc. to be useful MarkMLl (talk) 20:36, 9 January 2024 (UTC)


 * Also while I've not tried working it into the text https://www.awci.com/wp-content/uploads/ht/1981/1981-09-web.pdf pp20,21,32 might be useful: they provide useful illustrations of the geometry of the Ingolde Fraise tooth-finishing cutters. MarkMLl (talk) 20:56, 13 January 2024 (UTC)