On Wed, 8 Jul 2009, Leslie Newell wrote: > Date: Wed, 08 Jul 2009 16:47:59 +0100 > From: Leslie Newell <les.new...@fastmail.co.uk> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Servo tuning > > Hi Peter, > > One division = 0.01mm. > > Which screenshot are you looking at? The shot without I shows a very > small static error (around 1 - 2 counts). The end of the plot in the > first shot is not static error. The plot simply ran out of time before > the system reached steady state.
The point at the end of movement seems not to be corrected by the P term Unless this is just integrator windup. Can you do the same plot with no integral term? > > P and D are about as high as they will go. Any more and I get oscillation. > > Les > >> Also looking more carefully at the plot, you have a large static error (maybe >> huge: is 10m 10 mills?) This means you dont have enough P >> > > > ------------------------------------------------------------------------------ > Enter the BlackBerry Developer Challenge > This is your chance to win up to $100,000 in prizes! For a limited time, > vendors submitting new applications to BlackBerry App World(TM) will have > the opportunity to enter the BlackBerry Developer Challenge. See full prize > details at: http://p.sf.net/sfu/Challenge > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
