What algorithm is being used for smoothing by the pid controller?

[ReXT3D]

Some related discussion here:

Default [extruder] smooth_time is too long causing temperature oscillations

Greetings, I am posting this to document my findings for some feedback before opening an issue on GitHub. Background Before switching to Klipper, while I was researching it, I came across random posts and comments from people declaring that Klipper PID control was nowhere near as good as in other firmware. I found that hard to believe. Once I converted my printer to Klipper I did notice that the hot end temperature was somewhat less stable and tended to oscillate or “buzz” slightly around t…

I was also confused by this line, but I believe that it is simply a first order low-pass filter.