PID does not seem difficult (and I found much info on it on the net), =20
but tuning is apparently a black art.  I don't know where to begin =20
with autotuning, but I suspect it would be some iterative process that =20
tweaks the P/I/D constants and determining how quickly it reaches the =20
target temp, and how much it drifts over time.

If anyone here knows anything about autotuning, I'd love to be enlightened.

Cheers,
-Neil.



Quoting alan.b.pearce@stfc.ac.uk:

> I would suggest you check the libraries that Microchip have for the =20
> dsPic devices, I have a feeling there is a PID library in there, but =20
> I haven't checked.
>
> Other than that actual PID code seems simple enough. I suspect it is =20
> the auto-tuning part that is the hard part.
>
>
>
>
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