It has two I believe. Rob posted this in a PM the other day. " Have you seen this http://www.machinekit.io/docs/drivers/hal_arm335xQEP/ or http://www.machinekit.io/docs/man/man9/hal_pru_generic/
I was of the understanding that they both support quadrature encoders with index. I have used the hal_arm335xQEP driver to read a MPG. I have done some minimal testing and it works. Mind tho it is only with a handwheel so I haven't tried it with index. With HDMI eQEP2 is available. Cheers Rob " I don't recall why the people who ported MachineKit to the Beagle didn't make the Lathe part work. John > -----Original Message----- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: October-13-17 3:21 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] MachineKit on the BeagleBone Black > > On 13 October 2017 at 23:13, John Dammeyer <jo...@autoartisans.com> > wrote: > > The desire for the Beagle with me was originally that with LinuxCNC and a > quadrature encoder on the spindle along with the hardware QEP handled by the > PRU we'd have an awesome little lathe controller. Alas, that's the one thing > in > MachineKit that hasn't been addressed yet. > > I lost track of Machinekit a while ago. Do they have any > encoder-counting facility in the PRU? > > If they have then the rest is just config. (editing text files...) > > > Mach3 and my ELS both use one pulse per revolution for threading. And > before this starts a massive thread on how that just can't work, it does work > and as long as the spindle is reasonably steady it works well. > > Indeed, and LinuxCNC can be persuaded to work that way too. > > > But you obviously can't just stop the spindle mid thread and then turn the > spindle by hand manually. So there are limitations. > > LinuxCNC can do this (and yes, I am turning the spindle by hand): > https://www.youtube.com/watch?v=T4q8gCpeY1A > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > � George Fitch, Atlanta Constitution Newspaper, 1916 > > ------------------------------------------------------------------------------ > 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
