Recently i tried pid autotuning marlin command (M303 C5 E0 S240), it doesn´t work.
After that i saw the pid values set up in the firmware and was wondering:
M301 P13.00 I0.02 D106.25
In a older firmware release (where pid was not enabled) it was set to:
M301 P13.00 I0.10 D17.00
There is a huge difference in the two sets of D. The new value makes for me a difference of 3.5°C if i turn the fan on (M106), the old value to about 2°C.
Even the heating needs so much longer with a D of 106.25.
I guess this D and no autotune are kind of a bug.
I set my machine to the old M301 P13.00 I0.10 D17.00 and it works better with this…