On Wednesday 01 September 2021 08:33:41 Todd Zuercher wrote: > I have no experience tuning one of those drives. (but my experience > with torque mode was less than wonderful.) Just curious was your > machine a retro fit that was originally equipped with those drives, or > is it a new install of these drives? Were the drives velocity loops > tuned for your machine before you tried to use them? If they weren't > properly tuned for velocity command input on your machine it isn't > surprising that they may not work well in that mode. (While I haven't > tuned those drives for Linuxcnc, I do have a machine that uses them > with another control in I assumed velocity mode, I just haven't had to > mess with them.) > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 >
Breaking thread: Neither have I Todd. But our wiki doesn't seem to have anything like an educational discussion of the different "modes" of setting up a servo given the tools linuxcnc offers. For instance, the servo I designed to run that BS-1 clone is slow as can be because I had to put a limit3 in series with a direction change in order to prevent it from using reversal as a brake, it must be allowed to run down to zero before a reversal since if reverse is used before it stops, the current surge crowbars a 400 watt supply, shutting it down for a cooling recovery of around 2 minutes. And it actually does get hot in that millisecond or so of reverse. I haven't killed the supply, but its sure scary when it happens. Because the peak speed must be so restricted, the working response speed is less than 10% of the speeds its capable of. If it has to home from halfway around, it takes longer to home it than all 3 of the machines other axises in sequence. The wiki needs more attention to the education of the new bee so as to educate the worker bee better. I'll get me coat now. > -----Original Message----- > From: andrew beck <andrewbeck0...@gmail.com> > Sent: Wednesday, September 01, 2021 2:16 AM > To: Enhanced Machine Controller (EMC) > <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] torque mode > tuning yaskawa servo drives > > [EXTERNAL EMAIL] Be sure links are safe. > > hey everyone > > got good news to report back here! > > i changed to torque tuning and its like 10 times better than velocity > tuning in these drives > > someone one the forum said that he was starting to suspect that the > velocity tuning on the yaskawa drives was really that bad so they > allowed a torque feedforward setting to fix it lol > > anyway my initial findings were torque control is awesome > > i will post back later with more tuning findings > > regards > > Andrew > > On Mon, Aug 30, 2021 at 2:57 PM andrew beck <andrewbeck0...@gmail.com> > > wrote: > > hey everyone > > > > i am trying to tune my yaskawa sigma 1 series servo drive at the > > moment and thinking about using torque mode for tuning. > > > > currently the process is auto tune drives to a rigidity setting and > > then control drives with velocity reference in linuxcnc. I am not > > getting the most amazing control and any P value over 8 means the > > drive starts vibrating. i have tried a range of rigidity settings > > in servo drive > > > > i have never set up linuxcnc to control torque mode and just > > wondering if what the correct way is? is it the same as velocity > > control in terms of the pid loops and hal layer? or is there > > another whole level of stuff i need to do > > > > and i saw that i needed to speed up the servo thread a bit to get > > better performance if using torque mode > > > > anyway let me know your experiences > > > > regards > > > > Andrew > > _______________________________________________ > 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=04%7C01%7Ctod >dz%40pgrahamdunn.com%7Cfc80be69a1454359543408d96d11c596%7C5758544c573f4 >7cebee96c3e0806fb43%7C0%7C0%7C637660745400285926%7CUnknown%7CTWFpbGZsb3 >d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C >1000&sdata=ckvQRiz%2BQ4YLSZDX2NMPq83dEUQkyho5vv1wopbYYKU%3D&res >erved=0 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
