Hi, since I’m using my vertex mainly for (small series)mechanical parts that I’m printing in 0.2 layer thickness with no very small details (minimum wall thickness 0.8mm or two perimeters), I was looking for more speed. I tried printing at higher temperatures (pla up to 220°C), but eventually the heat from the nozzle came into the isolator and after an hour or two and the chances for blockages became very real.
So I ordered some drills(packages of 10 pcs, they break very easily) from Ali, 0.4, 0.45, 0.5 to gradually increase nozzle diameter.
The nozzle is made out of brass material and drilling with my dremel freehand was not so easy, it costed me a few nozzles. A drill stand is recommended. I brought it to 0.5 (or a bit bigger because of hand drilling).
The results are great, I could double the filament speed from 4-5mm³/s (SLIC3R software) (0.2mm layers) to a safe 8mm³/s (0.4mm layers) on a mechanical complicated part with +32 filament retractions per layer (contributor to nozzle blockages). Main observations is that the standard heater block has no problem melting the filament fast enough. I could even lower the (pla)filament temperature to 190°C. It seems highly unlikely it will block in this setup. Wall and surface finish is not much different to printing with stock setup.
With 8mm³/s the filament is really flying out of the extruder, and I’m not at the limit I think 10mm³/s on simple parts will be no problem.
It would however be easier if Velleman would offer multiple size nozzles…