kaktus' guide - fans - appendix
My conjecture has been confirmed. The linear stabilizer that powers the fans must dissipate a lot of power. Due to the above it becames very hot, which will definitely shorten his life ...
By tapping it with your finger you can get very burned. I examined the high temperature of this toddler with a thermal imaging camera.
You can see the results below.
That's why I de-soldered a goldpin from the controller board (I think it's just a bad thing, and I do not know why it was designed) that there would be more space. Then I equipped the linear stabilizer with an additional heat sink.
The achieved effect is sensational. The radiator is also cooled by a nearby fan ;-)
More interesting photos on my website, I encourage interested parties to watch.
by the way, I will add that more and more often I think about designing an additional electronic system that would help control cooling by other fans (hot-end & controller board)
the system would have two independent channels for controlling the fan
channel first autonomous - rotational speed depends on the current temperature (maybe two sets of settings to choose from) for Hot-end.
second channel - rotary speed adjustable by potentiometer (for controller board)
important information on the end
the cooldown option does not work in the printer menu.
Generally, non-action is manifested by the lack of any reaction.
so I think this option does not work