Feature Request : Don't preheat bed for filament Unload

[SukMeWot]

The current filament unload process should not ask for preheating, instead the menu should ask which fliament you are unloading and set the temperature, do the preheat of the hot end only, then eject, then cool. It should not be incumbent on the operator to select preheat, then unload, then cooldown, and it certainly shouldn't be heating the bed.

[Area5142]

The preheat menu could be shown to select filament type (temperature) and only set temperature for the hot end. After unload set temperature to 0.

[SukMeWot]

It does but it heats the bed too - MK3

[davidhbrown]

This seems poorly implemented, possibly to leverage existing preheat code. I'm unloading filament because the print is done. Heating the bed just wastes energy. (Could/should be labeled with "Firmware 3.6?")

[GreenShadowMaker]

Definitely unnecessarily heating the bed with filament unload on with 3.7.0 Not sure if it was happening with 3.5.3. (I don't remember it, or I was unloading before post print cooldown had happened)

[GreenShadowMaker]

looks related to #1688

[dstulken]

Any updates on this?

I noticed that the original post (Jan 2018) predates the release of the Prusa Mini (Oct 2019). One of the best features of the Mini is its small size and portability, and because of this, unloading the filament before moving/transporting the printer is an important part of its usage.

Having the bed heat up for this is completely unnecessary... and having both the hotend and bed stay at their temps after the operation was a surprise. I didn't even know there was a cooldown option until I found this issue request - so I suspect many others aren't cooling their machines down properly either after doing filament unloads...

[SukMeWot]

This has been a bug since I've owned a Prusa - well not a bug but a piece of poor coding that has been present since the beginning.