Hey todd The drives are new old drives I found. The existing drives used mecholink control that is to hard to talk to and I had the spare drives sitting in shed for years. I paid 10 bucks each lol so that's good at least.
The motors are existing. I have had to set up lots of stuff on the drives and the only thing that I had to tune them was the auto tuning function. Which was not that good. So far torque mode has been pretty good. But I might try two nested loops yet. Y axis is really good like max following error 0.04 at 16m/min X axis motor runs out of torque. And just can't keep up. I can set drive to push 300 percent rated torque through motor briefly. What do you guys think of that, is it OK? Factory default is set to 300 percent. I changed it to 100 percent On Thu, 2 Sep 2021, 02:10 Todd Zuercher, <to...@pgrahamdunn.com> 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 > > -----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%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Ctoddz%40pgrahamdunn.com%7Cfc80be69a1454359543408d96d11c596%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C637660745400285926%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ckvQRiz%2BQ4YLSZDX2NMPq83dEUQkyho5vv1wopbYYKU%3D&reserved=0 > > > _______________________________________________ > 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
