On Sunday 10 October 2021 13:20:52 John Dammeyer wrote: > > From: Gene Heskett [mailto:[email protected]] > > > > > > > > If the opto's are fast enough, you should be > > fixed. A 500 ppr encoder s/b fine. A 1024 or 1000 requires a faster > > opto. > > HI Gene, > Comparing the cheap far east BoB optos with the HCPL2621 is apples and > oranges.
The difference is cost, to the MBA between the engineer that designs it to work well, and the production floor manager buying the parts the MBA edits the BOM to use. We ought to have a DOA reward for MBA's and their ilk. > A 2500 line encoder still only creates 2500 pulses. The quadrature > just looks at two lines and 2 edges for 10,000 edges. But the max > speed of his encoder is 10,000 RPM which in RPS is 166.7 and would > result in 417kHz which is 4% of the opto max 10 Mbps capabilities if > the encoder was 2500 line. You've obviously done your homework, but I'm the guy who bought the $20 bobs that didn't work. The $80 dollar version that really worked well from cnc4pc was discontinued a decade back. But as a CET, I can usually fix the $20 version. :o) > But his is 500 line so at 166.7 RPS is 83kHz which is 0.8% of opto > capabilities. Great! > > John > > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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, 1940) 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
