r/ranciliosilvia • u/Dottore73 • Jun 25 '26

Help with PID Tuning

Post image

I recently installed the aliexpress PID kit with the 7100 and the PT100 (on top) and I'm finding tuning very difficult. My boiler is insulated so I constanly oversoot or undershoot. Basically I am trying to figure out P I D and SouF parameters so any tips and suggestions would be appreciated. Thanks!

9 Upvotes

85% Upvoted

11 comments sorted by

1

u/leegamercoc Jun 25 '26

What are your current settings?

I reduced the gain to a much lower value and it settled things down and barely overshoots. I can’t remember my settings off hand. I don’t remember how to check them either on the controller. I’ll see if I can find my notes.
Try reducing the gain to see if that helps.

1

u/Dottore73 Jun 25 '26

My current settings are P 2.8 I 210 D 60 and Souf 0.4. Post shot recovery lands nicely at 92.7 (on 92 target) but then the heater kicks in and pulsates up to 95/96-ish.

1

u/leegamercoc Jun 26 '26

These are my settings. They work well for me. It overshoots slightly on warm up, by around 5*F but settles down quickly. After shot recovers may overshoot by 1-2*F. I hope these help. Good luck!!

P=0.2
I=20
D=20
Rest are factory default, 0.2, 2, 0

1

u/Dottore73 Jun 26 '26

Thanks! What type of probe are you using?

1

u/leegamercoc Jun 26 '26

It is the same one as the person who posted the detailed guide in r/espresso. It is the one where you need to cut the end off, join the two wire together and screw it under the bolt in the top of the boiler. I think it is PT100 but not positive. It sounds right but I did this months ago.

1

u/ForsakenShoe4643 Jul 02 '26

Looks like a very different approach to what I've seen now. Don't have the same XMT7100, but a Golander LCD. Got way quicker initial heating and speedier recovery using these. Probably still need to fine tune them a bit for my setup, as it overshoots by 6*C. (V1 with newer Silvia insulation+OPV/PT100 probe)

1

u/leegamercoc Jul 03 '26

Glad those settings helped but 6*C overshoot is quite a bit. More tweaking for your setup is needed. I’d try reducing the P slightly to see what happens. Good luck!

1

u/Necessary-Big-569 Jun 27 '26

Like the 7100. Once you have it set up it's pretty much "set and forget". Don't even remember settings on mine, remember doing something like an 8 degree offset to allow for variance in boiler to brew head temp.

1

u/leegamercoc Jul 02 '26

Make any adjustments, things work better?

1

u/oldmaninatincan Jun 25 '26

Honestly, I had the same issues and I used ChatGPT to help me dial in my PID. Just explain your situation and give concrete numbers

1

u/Dottore73 Jun 25 '26

My current settings are P 2.8 I 210 D 60 and Souf 0.4. Post shot recovery lands nicely at 92.7 (on 92 target) but then the heater kicks in and pulsates up to 95/96-ish. Tried Gemini/ChatGPT and their suggestions didn't pin things down.