Re: [CAD_CAM_EDM_DRO] Position counter stop updating....

[Dave Engvall <dengvall-at-charter.net>]

On 8/28/02 11:38 PM, "Babar" <riet91-at-yahoo.com> wrote:

> 
> Note: forwarded message attached.
> 
That gain looks really low...
I assume you are using servos
Les posted some tuning stuff a while back. The reference is listed below:

http://www.shu.ac.uk/schools/eng/teaching/rw/pidtutorial.htm

I've had best luck with setting gain this way....set all the PID parameters
to zero and then increase P until you just get sustained oscillation. Use
60% of this P as your gain. Seems to work well.

Now go tune the rest of the parameters. I've done this in a very empirical
manner by logging a move and then plotting the difference between actual and
commanded position and adjusting D then FF1 then FF2 then (maybe) 'I' to
achieve minimum tracking error.

HTH

Dave