On Friday 14 February 2020 16:30:51 Andy Pugh wrote: > > On 14 Feb 2020, at 20:55, Gene Heskett <ghesk...@shentel.net> wrote: > > > > The coils are usually isolated, with op-amp bias supplied to one end > > of the coils, so you get sin plus and minus and cosine + and - > > I don’t think we are talking about coils here. > I was Andy, see the link Dave Engval posted to a pdf from a maker of such that described sin/cos encoders well. I've never used one but that was a well written tome, including the math I got lost in. What they didn't cover to my satisfaction was how they made a single cycle per turn into a many cycles per turn with index at the outout. Proprietary stuff inside the IC they were discussing, and which some would call magic, and which could result in a lag between position and output. But thats just a SWAG since I have zero experience with the care and feeding of such critters.
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
