On 8 May 2012 21:06, Dave <e...@dc9.tzo.com> wrote: > You have no Pgain, but Igain and Dgain. That's a problem. An all I and > D loop is almost always unstable.
That depends…. For a spindle P gain is not much help, as you need a non-zero PID output even when at the set speed (and when the error is zero). That is why the Wiki example is all-I. I assume that FF0 wasn't available when that page was written. I spent most of this afternoon at work tuning something that turned out to work best with 99% of the control coming from the D-term and 1% from I. But that was a rather unusual situation. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
