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
