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 -----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%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C02%7Ctoddz%40pgrahamdunn.com%7Cebfea5c501924f029c5308dc5edcaa7a%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C638489549065500531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=iNxGqNzkAKwXtD4PmQ2hHgkBuriUCq88Wl5WraibpAA%3D&reserved=0<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
