PETG and ObXidian 0.6 HF nozzle
The default volumetric speed in Prusa Slicer for PETG and 0.6 HF nozzle is 31 mm3/s (both for Prusament and generic PETG). What is maximum value non resulting in risk of clogging? What is your experience?
RE: PETG and ObXidian 0.6 HF nozzle
Well, it’s 31 mm3/s. That’s why it’s called MAX Volumetric Speed.
MK4S/MMU3
RE: PETG and ObXidian 0.6 HF nozzle
If you want to know the limit, you have to run volumetric speed test for your filament. Values in slicer filament profiles are more likely safe than maximum.
RE: PETG and ObXidian 0.6 HF nozzle
31mm3/s is quite high, for the hotend of this printer. PLA will be maybe OK. but PETG is often a nasty customer, specially when it's a bit wet. As a safe rule, I wouldn' t go higher than 25mm3/s or so (.. good luck fixing a clog in a HF nozzle ). Anyway, the possible trouble with the volumetric speed being too high. would be rather underextrusion than clogging.
RE: PETG and ObXidian 0.6 HF nozzle
Prusament PLA has 24 mm3/s (generic PLA 22 mm3/s) in slicer profile, but Core One PLA sample prints goes up to 34 mm3/s (with regular PLA). The Nextruder with high flow nozzles is very powerful. E3D documentation states that 0.6mm HF ObXidian should run PETG at 240°C at rate 36 mm3/s. With bumping a temperature a bit it should go even more. Also high flow filaments may give it a significant boost. I have not tried to find a limit yet, but I would expect it to be more than 40 mm3/s (depending on filament used).