On Thursday 30 November 2017 09:30:20 Peter C. Wallace wrote: > On Thu, 30 Nov 2017, Gene Heskett wrote: > > Date: Thu, 30 Nov 2017 09:16:16 -0500 > > From: Gene Heskett <[email protected]> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <[email protected]> > > To: [email protected] > > Subject: Re: [Emc-users] omron encoders > > > > On Thursday 30 November 2017 06:19:58 Les Newell wrote: > >> Ok, I looked trough your previous posts. It appears that you are > >> getting 7161.17 counts per spindle revolution. Your max frequency > >> in that case is (7161.17 * 3000) / 60 = 358058.5Hz. 358kHz is well > >> within the range of the 5i25. > >> > >> What is your encoder filter set to? > > OK so a 358 KHz count rate means 89 KHz on A and B or about > 5.5 uS high/low time so we set the filter to one half of that: 2.75 uS > This works out to a encoder sample frequency of say 5.5 MHz > with the (15 count) encoder filter on. > > > False. True and it all dies at about 400 spindle rpms. > > This could be because of the encoder samplerate/filter setting or your > interface > I wasn't sampleing near fast enough. I'll put those figures in right now. Done. Thanks.
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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
