PETG and ObXidian 0.6 HF nozzle - How do I print this? (Printing help)

RE: PETG and ObXidian 0.6 HF nozzle

Biomech — Mon, 28 Apr 2025 13:41:43 +0000

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).

RE: PETG and ObXidian 0.6 HF nozzle

Artur5 — Sun, 27 Apr 2025 11:13:02 +0000

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

Biomech — Sat, 26 Apr 2025 20:04:41 +0000

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

LarGriff — Sat, 26 Apr 2025 12:42:38 +0000

Well, it’s 31 mm3/s. That’s why it’s called MAX Volumetric Speed.

PETG and ObXidian 0.6 HF nozzle

reinvented.tech — Sat, 26 Apr 2025 10:14:32 +0000

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?