High-Flow PETG print settings
High-Flow PETG prints at about 245 °C with a 80 °C bed and 40% part cooling. Usable range 230–260 °C nozzle, 70–90 °C bed. No enclosure needed.
PETG-HFRapid PETG
Starting settings
- Nozzle
- 230–260 °C (start 245)
- Bed
- 70–90 °C (start 80)
- Part fan
- 20–60% (start 40%)
- Wall speed
- 30–80 mm/s
- Max volumetric flow
- 14 mm³/s
- Shrinkage
- 0.4%
- Softens at
- 80 °C
- Enclosure
- Helps
- Nozzle size
- 0.4 mm or larger — 0.6 mm recommended
- Nozzle material
- Brass is fine
- Drying
- 65 °C for 6 h
Speed
FASTER than plain PETG, 45–80 mm/s, IF the hotend can melt it. Same caveat as high-speed PLA: the filament raises its own limit, not your printer's.
Bed surface
Textured PEI, or glue stick on smooth as a release agent.
Nozzle
0.6 mm to actually use the extra flow. On 0.4 mm it prints much like ordinary PETG.
What bites people
- Same caveat as high-speed PLA: the filament melts faster, your hotend still sets the ceiling. Run the flow ramp before trusting the marketing.
- Everything else about PETG still applies — it bonds hard to smooth PEI, and it strings when wet.
Safety
- Nozzle above 230 °C. Bed above 70 °C is hot enough to burn.
Open First Layer →
The app walks this in order, generates the test model for your nozzle and filament, and
records what you measure so nothing has to be repeated. Free, no account, works offline.