Need for speed

[Gimbal]

Hi I'm wondering what are restricting us from reaching really high speed, retract>shutoff valve, temp control>higher power and thermo coupler, melt zone control>water cooling, what else?
I have long experience from molding machines and i know its possible to reach incredible speed with them so it's not the material.
Any idea are welcome

[Polygonhell]

Depends what you are printing.
If it's small the print time will be dominated by the cooling requirements of the printed material.
If it's large Jerk and Acceleration settings become a factor as you increase speed.
Extruders are often the limiting factor, you reach a point where you simply cannot push filament through faster, if the hotend has a large meltzone and a short nozzle (Budaschnozzles are like this) then it will print faster, but you have issues controlling ooze.
You also have to remember you're not printing with the material entering the meltzone, that's acting as a "plunger" and increasing the pressure which is causing the plastic to extrude so there is hysteresis to contend with, as speeds increase pressure tends to vary more during the print which results in lower quality.

[Gimbal]

Think we can get better controll over hysteresis with the rubberband orbeting extruder, and a shutoff valve. Another way to go are a extruder with hotrunner and shutoff valve, it can be made really small