First attempt at PID control... was an abort. PID didn't seem to do anything, but if I attempted to manually move the Burner slider, the PID would move it back. I went back in and reviewed, changed a bunch of settings, and hoped for the best on the next round.
Second attempt met with some success. Initially, it seemed like the PID was doing anything again, but then midway through the roast, I noticed it was working. I think I had the SV minimum set too high (or didn't realize the role that played), and also I had the "negative" target enabled on the PID, which I don't think I need (my servo control is positive, from 0 being a low flame, to 100 being full on).
Third attempt worked! Wasn't necessarily too pretty, but I didn't touch the burner knob. I could see the servo spinning it around a bit. For some reason, Artisan does not plot the Burner Slider changes the PID is making. I notice it does plot them if I manually move the slider. I hope there is a way to make that happen and I just haven't figured it out. Anybody have a suggestion on how to turn this on?
I'll attach the scope on the third roast is below. Since I have to remove the ET/BT probes when I charge, I didn't bother to start the scope until after I had done the charge and reinserted the probes. I had preheated the Kaldi to around 200C just prior to doing that. Forgot to shut Artisan off, and it ran on a bit.
I'll also attach some screen shots of settings.
I'm going to chew on this a bit and ponder how to tweak things to improve the PID tracking and get a better ROR. Any suggestions are welcome, specifically on how to get Artisan to log the Burner changes the software PID is making (I can see them happening on the slider and servo, but not on the plot).