So this is presumably something that smarter people than I have considered at length, but I would like to understand it a little better:
When printing with a 0.8mm nozzle, the main speed limit seems to be the volumetric flow rate, rated at 15mm^2/s by the e3dv6. When I tested increasing extrusion speed, I got up to 19mm^3/s before the extruder started clicking. But much earlier than that, the filament curled up rather than flow straight, something I take to be a sign of colder extrusion. I took out a power meter and found that while during heating the printer used ~50W, while just keeping the hotend at temperature and extruding, it used ~30W (as opposed to ~10W when doing nothing). My conclusion is that the power input to the hotend is determined solely by the PID-derived settings.
Would it be feasible/make sense to use the known values of amount of filament needed to be heated to increase the power to the hotend when a lot of filament is going through?
Thanks,
-Lars
If the hotend is maintaining temperature, is varying the power going the ultimately change anything?
I've been getting spectacular throughput results with different filament types and nozzles. With a 3D Solex Matchless 0.6mm nozzle mounted and printing PETG, I can print plastic as fast as the extruder can feed it, though print quality suffers.
11.5mm^3/s is a safe value for PLA through a 0.4mm nozzle, but results are very different with other materials and nozzle sizes.
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