[FR] Implementing Maximum Volumetric Speed.

[JohnEdwa]

Every hotend has a maximum amount of plastic it can melt and extrude before it starts cooling down too much, which is a quite handy bit of information to use in limiting printing speeds. PrusaSlicer has this option, and it even calculates and shows all the values to you, and having it in Cura would be extremely helpful as well. The formula is "Volumetric Flow = Line Width * Layer Height * Print Speed"

My main use-case for this is printing infill as fast as possible - currently, it requires me to manually check that I don't increase these values too much for my hotend to handle. It would be useful if I could give Cura the known good conservative value of 8mm^3, and even if I do set it up to print a 0.44mm wide, 0.3mm thick infill layer at 90mm/s ( 11.8mm^2), it would (preferably) warn me about it and limit the speed down to 60mm/s.

[daT4v1s]

also notice that the temperature of the material you are using may affect e.g. PLA at a higher temperature may support a higher extrusion volume (see https://www.youtube.com/watch?v=Mnvj6xCzikM)