Hi Alan, Perhaps this holds the answer:
https://lemariva.com/blog/2019/11/raspberry-pi-4b-sometimes-its-cool-to-be-hot-or-warm-exact Martin ________________________________ From: Alan Condit Thank you Peter and John, I changed the thread timing, and added the isolcpus=1,2,3. I haven’t added the force_turbo=1 in config.txt yet but already it is much improved. I haven’t run it long enough to get it hot, I suspect I need a fan on it when I add the force-turbo=1. It is in a Raspberry Pi4 case with no fan. Alan > From: "Peter C. Wallace" <p...@mesanet.com> > Subject: Re: [Emc-users] Linuxcnc configurations using Mesa > Date: September 30, 2022 at 3:33:34 PM CDT > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > > > On Fri, 30 Sep 2022, Alan Condit wrote: > >> Date: Fri, 30 Sep 2022 15:12:57 -0500 >> From: Alan Condit <condit.a...@gmail.com> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: EMC-Users <Emc-users@lists.sourceforge.net> >> Subject: [Emc-users] Linuxcnc configurations using Mesa >> I have a D525MW that I was using to drive my PCBMill. It got some chips in >> the controller box and shorted out the BOB and apparently damaged the >> parallel port slightly. Other than the parallel port the D525MW seems to run >> fine. I replaced the BOB in the controller box but it still didn't seem to >> run correctly. I am not positive whether it is a drive or the parallel port >> that is damaged. I finished a new controller cabinet for my PCBMill with a >> Mesa 7i76e. On my PCBMill I am getting lots of read and write error messages >> with Linuxcnc on my Rpi4 with the 7i76e. On my CNCLathe, I have a Dell >> Optiplex 330 running a 5i25/7i76 pair. Is it feasible to replace the >> 5i25/7i76 pair with the 7i76e? I also have a 7c81 mesa card. On my PCBMill >> could I use the Rpi4 with the 7c81 to drive the 7i76? Do these changes make >> any sense? I don't want to screw up my CNCLathe, it runs fine right now. >> However, I would like to get my PCBMill running more reliably. >> >> Alan >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > If you get read errors on a RPI4 and 7I76E, I would double the servo thread > period (the RPI4 is marginal at a 1 KHz servo thread period with some kernels) > > > Peter Wallace > Mesa Electronics > > 2 ms or the equivalent 500 Hz > > Also check tha you have isolcpus 1,2,3 on a RPI4 > > Peter Wallace > Mesa Electronics From: "Peter C. Wallace" <p...@mesanet.com <mailto:p...@mesanet.com>> Subject: Re: [Emc-users] Linuxcnc configurations using Mesa Date: September 30, 2022 at 3:50:46 PM CDT To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net <mailto:emc-users@lists.sourceforge.net>> On Fri, 30 Sep 2022, John Dammeyer wrote: > Date: Fri, 30 Sep 2022 13:40:57 -0700 > From: John Dammeyer <jo...@autoartisans.com <mailto:jo...@autoartisans.com>> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net <mailto:emc-users@lists.sourceforge.net>> > To: "'Enhanced Machine Controller (EMC)'" <emc-users@lists.sourceforge.net > <mailto:emc-users@lists.sourceforge.net>> > Subject: Re: [Emc-users] Linuxcnc configurations using Mesa >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> >>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> <https://lists.sourceforge.net/lists/listinfo/emc-users> >>> >> >> If you get read errors on a RPI4 and 7I76E, I would double the servo >> thread period (the RPI4 is marginal at a 1 KHz servo thread period with >> some kernels) >> >> >> Peter Wallace >> Mesa Electronics > > So you'd change it to 500Hz or 2kHz? > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users > <https://lists.sourceforge.net/lists/listinfo/emc-users> > Also forgot to add, you need force_turbo=1 in config.txt Peter Wallace Mesa Electronics _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
