Yes, this is true resistance is around 4 so definitely a 12v 40W heater. Thank You David.

Thanks for that explanation. It's different from what the wired Duet does - but the wired Duet doesn't use the lwip socket interface. I presume I could replace the socket close call by a shutdown call to avoid the reset.

Yes that is on the list to do.

Thanks David

Cheers

Fairly redundant with the other document, but I found another little auto-tune "white paper" I wrote a couple years ago: https://docs.google.com/document/d/1NhgKmadb-GhqncekIlJEBUHKlc-PzJY42-hhr58QJ9I/edit?usp=sharing

This one has air-loss calibration and melt power auto-calibration.

(Yes, I've been trying to convince firmware devs to implement feed-forward temp control for years.)

Hi Phil

Fixed the documentation link

Some of the pictures are still direct links in the wiki, which need to be moved to proper wiki file references. Even then though images are fixed width, I will look to see if I can make media wiki display images responsively.

Cheers

Tony

Thanks Koko76, that helps to confirm my theory about what causes it.

The help system will be available on the other Duets too.

Awesome! +1 to Filastruder for speedy service!