I need to mount a decent encoder (I need direction) - then i think -980 to 980 rpm would be on pid control for just the armature. That would act like a normal motor control - and i bet it could be pretty tight. Then above that would be a separate pid that is probably a lot less aggressive.
(as Andy has said) The over all 'loose' pid around the whole loop isn't bad.. I think it could be better though.. On Sun, Sep 15, 2024 at 12:54 PM Sam Sokolik <samco...@gmail.com> wrote: > Correct. The original control had a low voltage lockout on the field. > > On Sun, Sep 15, 2024 at 12:45 PM Ralph Stirling via Emc-users < > emc-users@lists.sourceforge.net> wrote: > >> Just be sure your field can't drop out without the armature shutting >> off. You don't want a runaway dc motor. >> >> -- Ralph >> >> On Sep 15, 2024 10:27 AM, Sam Sokolik <samco...@gmail.com> wrote: >> CAUTION: This email originated from outside the Walla Walla University >> email system. >> >> >> So... Without ripping out the current spindle motor and starting over.. >> >> It works surprisingly well - the 0-950 acts like a normal dc motor (field >> voltage stays constant) The field weakening is a bit more mushy. >> Dropping >> the field voltage from 115v to 28V runs the rpm up from 950 to 2500 a bit >> slower.. >> >> Currently I have a 2 lincurv components that take RPM and spit out a >> voltage to each drive (field and armature) In front of that is a limit2 >> which limits the slew to 400rpm/sec. If I put a pid loop around that - >> it >> works ok - and maybe that is as good as it gets. >> >> Thoughts? >> >> On Fri, Sep 13, 2024 at 6:35 PM Sam Sokolik <samco...@gmail.com> wrote: >> >> > You are right - for just spindle control.. But the 5 year plan is to >> also >> > cnc the monarch. (and linuxcnc has all the stuff working and known - >> > encoder, limit2, pid, lincurve, pwmgen and so on..) I would rather not >> > re-invent the wheel. (and I am far from comfortable coding on the >> arduino) >> > >> > sam >> > >> > On Fri, Sep 13, 2024 at 6:11 PM andy pugh <bodge...@gmail.com> wrote: >> > >> >> On Fri, 13 Sept 2024 at 23:25, Sam Sokolik <samco...@gmail.com> wrote: >> >> >> >> > Enter Hal, 2 amc drives and a rpi5... (and a few other things) >> >> >> >> Much as I am a fan of LinuxCNC, that's probably a job for an Arduino, >> >> really :-) >> >> >> >> -- >> >> 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://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C02%7Cralph.stirling%40wallawalla.edu%7Cd94d5d750820460ea30f08dcd592855c%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C638620072515305301%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=f6i9YM3YoEY9mwcBUFTO7cFNevnbUHxRdICjVLbVDj0%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 >> > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
