On Wed, Feb 2, 2011 at 1:13 PM, <kil...@bobodyne.com> wrote: > > DC servo motor with encoder like feedback (it has a resolver adn resolver > to > > quadrature converter card). > > > Well, I would really like a tuning component that compensates for > friction. > > P,I,D are not quite it. > > > > I already tuned P to be quite high, almost as high as possible but still > > without oscillation. > > Are you talking about a constant friction or somethingmore like > sticktion > where the initia zero-velocity friction is much higher than the > constant- > velocity friction? > > I am talking about constant friction that does not depend on velocity.
> What does your step-response look like for a fairly long step with > your current tuning? (fairly-long being long enough to get things > up-to-speed.) > > What do you mean by step-response, sorry. > PD should be able to do it for you if everything else is sized > appropriately. > > I am OK, right now my following error is something like 2-3 minutes of arc, I can live with it. i ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
