2012/2/2 andy pugh <[email protected]>: > On 2 February 2012 15:09, Viesturs Lācis <[email protected]> wrote: > >> Could it be anything else, but the encoder problem? > > It could be an unfortunate resonance between the mechanical frequency > of the machine frame and the servo loop. This might be why increasing > the servo frequency was helpful.
Increasing servo servo period frequency from 1 kHz to 2kHz helped. But any further increase up to 5 kHz did not provide any additional improvement. Even more, with 5kHz (and RTAI errors) I actually have returned at starting point. I had some courses, covering resonances, and the conclusion is that there should have been additional changes in behavior, when further changes in servo update rate were made. And it should not had gone back to the initial behavior. But that theory... 2012/2/2 Sven Wesley <[email protected]>: > > Did you try my suggestion to ground the encoder, as written in my previous > mail? Sorry, I forgot. The thing is that I did not find that there was not an issue with lost encoder pulses anyway... Viesturs ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
