On Wed, 8 Jul 2009, Leslie Newell wrote:
> Date: Wed, 08 Jul 2009 13:23:59 +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
>
> I have just got the lathe on the internet so I uploaded a screen shot of
> the I weirdness <http://imagebin.ca/view/Yh4hGxr.html>. It shows a long
> move followed by the term returning the axis to position. The big spikes
> are accel/decel. Here is a shot with the I term turned down to 0 but
> everything else the same <http://imagebin.ca/view/3Uj1P_1.html>. I still
> need to play around with the tuning to get rid of those acceleration
> spikes. The accel is set very high at the moment for testing purposes.
>
> Les
>
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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
Peter Wallace
Mesa Electronics
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