orcinus wrote:Less moving mass. Meaning less inertia, overshoot and vibration, eapecially at higher acceleration and jerk.
And on top of that, the higher the acceleration and jerk, the less blobbing and fattening you'll get at sharp direction shifts.
I disagree slightly with the second half of that.
Any extruder has a non-zero response time. By that, I mean it starts extruding after the stepper starts, and the rate at which molten filament comes out of the nozzle is behind the movement of the stepper; a remote extruder much more so. Any firmware worth its salt runs the extruder at a speed proportional to the speed of the nozzle, even if that varies during a given G-code command, so having to slow down to corner, in itself, is not a cause of fattening. As I see it, the main cause of blobbing and fattening would be a slow extruder response time compared to the acceleration involved. (Jerk when starting and stopping would also cause problems, because the extruder would need to start and stop suddenly, but that is partially compensated by retraction; some jerk when cornering is good because it allows the speed to vary less.) Increasing acceleration would magnify the effect of the extruder response time: put simply, it would make it harder for the extruder to keep up with the nozzle movement. Switching from a classic extruder, with its quick response time, to a remote extruder, with its significantly longer response time, would also make the rate of extrusion depart more from the ideal correlation with the speed of nozzle movement. So I see a less responsive extruder coupled with higher acceleration as a double whammy -- definitely not an improvement. The bright side is that, with higher acceleration, more corners could be taken at high speed, so the rate of extrusion would need to vary less. In other words, higher radial acceleration available reduces the tangential acceleration necessary, and it's only the latter that applies to the extrusion rate.
However, whether the positive or the negative effects dominate, and how much of the negative you are willing to put up with to get your prints faster and/or with fewer vibration artefacts, I don't know.