2012/12/30 Peter C. Wallace <p...@mesanet.com>: > > You may be in current limit above ~.4 so more voltage does not make a > difference >
Yes, You are right, it did turn on the error led somewhere around 0.6. Although I do not really understand that - I just retried n mode and frequency/value combinations to get up to 3000 RPM. Gradually increasing both of these pins allowed for value = 0.89, frequency = 200 and error led did not turn on (and did not even try to). I tried to add some resistance by grabbing the pinion, but the motor was stronger. > > Can you try changing the lead angle? default is 90 degrees which should > always be right but it does sound like theres a a lot of current going into > the motor thats not generating torque which might indicate a problem here > > (change in ~10 degree steps around 90) > Stepping down did decrease the speed, stepping up did improve it. Currently I have ended up with lead-angle = 150, because with 160 it was even faster in one direction, but refused to turn in opposite direction, so this is last value, when motor turned in both directions and was faster than any other value before that. Thank You, this has improved velocity, before drive reaches current limit. Motor spins somewhere around 1470 RPM. I think I can live with that - machine would move approximately at 7 m/min, which is not fast for plasma table, but that will cover the thickness range they need to cut (from 2 mm to 30 mm, vast majority between 10 - 20 mm thick) and fortunately I do not have any commitments regarding max velocity. Any ideas, why does pid output get saturated as soon as I try to jog the motor? I just retried and it is still the same. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_123012 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
