This was also John k..  I would trust his solution.  He is the one that
came up with hal in linuxcnc... (Among other things).

On Thu, Jan 1, 2026, 9:49 AM andy pugh <[email protected]> wrote:

> On Thu, 1 Jan 2026 at 15:41, andy pugh <[email protected]> wrote:
> >
> > On Wed, 31 Dec 2025 at 22:14, andrew beck <[email protected]>
> wrote:
> >
> > > just looking for a config example if possible for a mesa card from
> someone
> > > that has this nested PID loop setup.
> >
> > This may not be as effective as you would hope. Cascaded PID loops...
>
> Actually, what was done with the MPM jigmill wasn't a cascaded PID.
> What was done there was to run a P + FF control based on the motor
> encoder and an I control based on the linear scales.
>
> Then the two controllers were summed together to create a PID
> controller, but with I using a different feedback source than P and D.
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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