On Wednesday 27 May 2020 11:38:05 Peter C. Wallace wrote: > On Wed, 27 May 2020, N wrote: > > Date: Wed, 27 May 2020 17:18:16 +0200 > > From: N <nicklas.karlsso...@gmail.com> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> > > To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] FERROR > > MIN_FERROR value? > > > >> On Tue, 26 May 2020 at 19:45, Gene Heskett <ghesk...@shentel.net> wrote: > >>> I just tried an experiment. Since there are no pid's in that > >>> sheldon setup, I commented out the *ERROR entries in the .ini > >>> file. Interesting as it made zero difference in how it ran. > >> > >> That probably means that the default values are large. > >> > >> You don't need PID to measure f-error. It is the difference between > >> motor-pos-cmd and motor-pos-fb for each axis. > >> (Just that, and nothing more) > > > > But as I understand he made the test without feedback of measured > > value ... > > For joints (or axis on 2.7), theres always feedback and LinuxCNC > always checks for following errors. > > The following error settings make no difference in motion except that > you will get a fault and motion will be stopped if they are exceeded. > > If you dont set the following error or minimum following error they > default to 1.0 so are effectively disabled. > Which is why one should make a sub2 and scope the output while abusing the machine.
I've not done that, as other more pressing issues with lack of doctors and prescriptions are makeing me go buy a smart fone, then learn how to use it so we can do teleconferencing with the doc that will renew the prescriptions. So I've bought a Galaxy A10e and its charging now. Wish me luck if you've any to spare. Thanks Peter. > Peter Wallace > Mesa Electronics > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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) 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
