The machine is currently running Linuxcnc 2.7, but the Mesa cards, are significantly older, dating back to the Linuxcnc 2.5 era.
I'm not sure how comfortable a feel about updating this machine to current at the moment. It is running 32-bit RTAI, and I'm not confident I'll be able to achieve the necessary latencies with the currently available mainstream 64-bit real time kernels required for the current version of Linuxcnc on the machine's current computer. All of my actively running Linuxcnc machines are still on 2.7. I am in the midst of a major overhaul of one machine that will be current version of Linuxcnc. But I'm very hesitant to pull the other running machines out of production to upgrade until after I have more experience working with the newer versions. (JA and the move to requiring 64-bit kernels were very big changes.) Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -----Original Message----- From: Peter Wallace <p...@mesanet.com> Sent: Wednesday, April 17, 2024 1:09 PM To: Todd Zuercher via Emc-users <emc-users@lists.sourceforge.net> Cc: Todd Zuercher <to...@pgrahamdunn.com> Subject: Re: [Emc-users] Home to index triggers following error [EXTERNAL EMAIL] Be sure links are safe. On Wed, 17 Apr 2024, Todd Zuercher via Emc-users wrote: > Date: Wed, 17 Apr 2024 17:00:31 +0000 > From: Todd Zuercher via Emc-users <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Cc: Todd Zuercher <to...@pgrahamdunn.com> > Subject: Re: [Emc-users] Home to index triggers following error > > Sorry to hijack the thread, but I've had to live with this on a machine that > I'm using cascaded double PID loops on. I have the velocity loop PIDs > running in a fast floating point base thread to help with the tuning of some > cantankerous torque mode servos. The position loops are still in the servo > thread (because I can't run the whole servo thread as fast as I can the > floating point base thread.) Reading/writing to the Mesa hardware in a > faster loop than the servo thread seems to break the f-error disable for the > encoder reset. I think because the encoder reset doesn't always occur when > the it is expecting it or something to that effect. I've tried just running > a faster servo-thread, but I can run the lighter floating point base thread > about 4x faster than I can the whole servo-thread. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 What LinuxCNC version? There was a bug in the hostmot driver index handling that was fixed fairly recently (a couple of years ago) > > -----Original Message----- > From: andy pugh <bodge...@gmail.com> > Sent: Wednesday, April 17, 2024 8:47 AM > To: Enhanced Machine Controller (EMC) > <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Home to index triggers following error > > [EXTERNAL EMAIL] Be sure links are safe. > > On Wed, 17 Apr 2024 at 12:45, Tomaz T. <tomaz_...@hotmail.com> wrote: > > now it doesn't trigger following error any more (homing completes >> successfully), interesting thing is, that on first attempt of homing >> after fresh starting LinuxCNC I see quite large spike on f-error when >> hitting index pulse, this large spike doesn't accrue on any more on >> second attempt of homing or later, only after fresh start and on first one. > > > > It will only trigger the f-error if the difference between the current > encoder position and the zero position is larger than the f-error limit. > Once you have homed once jump will be at most a few encoder counts. > > -- > 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, 1912 > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist > s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C02%7Ctoddz% > 40pgrahamdunn.com%7Caabbda5a92bc456d94f908dc5f01089e%7C5758544c573f47c > ebee96c3e0806fb43%7C0%7C0%7C638489705254573705%7CUnknown%7CTWFpbGZsb3d > 8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C > 0%7C%7C%7C&sdata=lQy1UeoeN80M7tWPYw5Dn5zQ7h6kCmXWUFT6iXsEPqs%3D&reserv > ed=0<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2 > Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C02%7Ct > oddz%40pgrahamdunn.com%7Caabbda5a92bc456d94f908dc5f01089e%7C5758544c57 > 3f47cebee96c3e0806fb43%7C0%7C0%7C638489705254582556%7CUnknown%7CTWFpbG > Zsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0% > 3D%7C0%7C%7C%7C&sdata=%2B%2B3zezrWIsuDQ6dkuMvAJJeGqiK4NQ0XqmScHe6k2fc% > 3D&reserved=0> > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist > s.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C02%7Ctoddz% > 40pgrahamdunn.com%7Caabbda5a92bc456d94f908dc5f01089e%7C5758544c573f47c > ebee96c3e0806fb43%7C0%7C0%7C638489705254588956%7CUnknown%7CTWFpbGZsb3d > 8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C > 0%7C%7C%7C&sdata=6H3L%2FPtsqyGpKAerIWL63bCQYKYU49vXVHxjc8cPgZc%3D&rese > rved=0 > Peter Wallace Mesa Electronics _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
