I have had to tweak the deadband value to get rid of loop instability due to worn ball screws. Noise and mechanical slop would cause the loop to hunt badly without some deadband. Sounds like you had a similar problem.
Dave On 5/11/2015 12:45 PM, Rick Lair wrote: > I had 0.00001 in the entry. > > > > On 5/11/2015 12:43 PM, andy pugh wrote: >> On 11 May 2015 at 17:05, Rick Lair <r...@superiorroll.com> wrote: >>> I thought that the deadband value would only effect the positioning when >>> the axis was idle, not while in motion? >> No, it is the position error required before there is any output from the >> PID. >> Out of interest, how big was the tiny value? >> I don't think you would expect to need deadband with resolvers, though >> my experience is limited to one machine. >> --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
