Check out my 2nd channel, TT Racing:    / @ttracingyt  

I personally only tune my hot end PID for a single temperature wit the part cooling fan at 100%. But perhaps a lot more accuracy and stability can be found with conditional PID tuning. In this video, I take you through what PID is, how to tune it, and how to tube it for various scenarios and apply the, in the slicer. In theory this is superior, but in practise the effort may not be worth the meagre returns. What do you think?

Thanks to Bob Sissan for the request.

0:00 Introduction

0:42 What is PID control?
PID control wiki: https://en.wikipedia.org/wiki/Proport...
Bang bang control wiki: https://en.wikipedia.org/wiki/Bang%E2...

2:57 What happens if the PID values are incorrect?

3:29 How to autotune PID?
PID autotune video:    • Two easy fixes for 3D printer tempera...  
PID autotune written guide: https://teachingtechyt.github.io/cali...
Marlin M303 gcode: https://marlinfw.org/docs/gcode/M303....
Klipper PID autotune documentation: https://www.klipper3d.org/Config_chec...

5:00 Bob’s question - Scenarios for PID tuning

7:18 Tuning for multiple scenarios
Marlin M106 reference: https://marlinfw.org/docs/gcode/M106....
Klipper M106 reference: https://www.klipper3d.org/G-Codes.htm...

7:55 Setting PID values on the fly
Marlin set PID M301 gcode: https://marlinfw.org/docs/gcode/M301....
Klipper feature request: https://github.com/Klipper3d/klipper/...
Closed Klipper pull request: https://github.com/Klipper3d/klipper/...

8:37 Setting PID settings per material

9:31 Setting PID for no fan vs fan
Pastebin with conditional gcode: https://pastebin.com/0yE0yJHn

12:24 Conclusion

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