On Thu, 2013-03-28 at 07:05 -0500, Stuart Stevenson wrote: > Gentlemen, >
<snip> > Everyone says the drive/motor servo tuning is the best but if that is > the case why is there tuning capability in LinuxCNC? Obviously, it is > not good enough or no effort would be expended in making it better. > I will try this on one of my systems. > Maybe I need to work on a pseudo tach feedback that I generate to get > the desired result. > thanks > Stuart > <snip> > Hi Stuart, It is not that no one has ever tried to make an auto-tune for linuxcnc. The problem is non-trivial. There was an alternative pid module but I could never get it to work. At one time a visiting scientist at NIST did some work on tuning. It worked about as well as a reasonable skilled human in tuning. However, the guy left before getting it documented and it just disappeared. If I had the skills to program it I'd try very short tests with randomly picked sets of parameters with the idea that one would get something usable and then refine from there. (Monte Carlo) A Bode plot would be nice but still one needs a way to get from that to the correct parameters for a tuned machine. Google searching yields many hits but most are buried behind $$ to IEEE for a copy. Many years ago JMK was working on a hal procedure for tuning but got stalled probably by available time. :-( HTH Dave > > > ------------------------------------------------------------------------------ > Own the Future-Intel® Level Up Game Demo Contest 2013 > Rise to greatness in Intel's independent game demo contest. > Compete for recognition, cash, and the chance to get your game > on Steam. $5K grand prize plus 10 genre and skill prizes. > Submit your demo by 6/6/13. > http://p.sf.net/sfu/intel_levelupd2d > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > -- > dos centavos ------------------------------------------------------------------------------ Own the Future-Intel® Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
