Viesturs Lācis wrote: > 2012. gada 28. janvāris 18:14 noel <noel.ro...@comcast.net> rakstīja: > >> All interested in Servo Tuning. >> >> Have a look at: >> http://support.motioneng.com/Downloads-Notes/Tuning/default.htm >> >> > > In the link from Noel I find that all three (well, the last maybe not > that much) PID tuning methods: > http://support.motioneng.com/Downloads-Notes/Tuning/3_pid_tune.htm > > Suggest starting with finding correct D parameter, as opposed to > previously expressed opinions that P parameter is the one to start > with. > > Can anyone with experience in servo tuning comment on this? > > > Can anyone comment on this? > If your P is too high, no amount of D will stop the violent oscllation. If your P is too low, there will be no movement at all, and D will do nothing.
I think you need to have P within a reasonable band for the particular servo drive so that movement happens when it is commanded. Note that a lot of treatises on PID tuning use an oven and a thermometer as the model. This is a one-quadrant system, and not as relevant to a servo motion axis. Jon ------------------------------------------------------------------------------ Try before you buy = See our experts in action! 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-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
