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Polycarbonate settings for the Elegoo Neptune 4
Possible with tweaks
These are tuned starting settings for printing Polycarbonate on the Elegoo Neptune 4. The Elegoo Neptune 4 has a direct-drive extruder and an all-metal hotend, so we set the hotend to 275°C and the bed to 110°C. Polycarbonate is one of the strongest filaments but needs high temps and an all-metal hotend.
275°C
Hotend
110°C
Bed
49 mm/s
Speed
0%
Part fan
Recommended Polycarbonate profile
| Hotend temperature | 275°C (tower 260–300°C) |
| Bed temperature | 110°C |
| Print speed | 49 mm/s |
| Retraction | 1.2 mm (direct drive) |
| Part cooling fan | 0% |
| Bed adhesion | Very hot bed + enclosure; PC needs an all-metal hotend. |
| Nozzle | Brass 0.4 mm is fine |
| Difficulty | Advanced |
⚠️ Polycarbonate warps without an enclosure and the Elegoo Neptune 4 is open-frame. Block drafts, raise the bed temp, and add a brim; for tall parts an enclosure is strongly recommended.
💡 Best uses for Polycarbonate: high-heat parts, impact-resistant parts.
Shop Polycarbonate on Amazon →
FAQ
- What temperature should I print Polycarbonate on the Elegoo Neptune 4?
- Start at 275°C for the hotend and 110°C for the bed, then run a temperature tower across 260–285°C to dial in your exact filament brand.
- What print speed works for Polycarbonate on this printer?
- Around 49 mm/s is a safe starting point on the Elegoo Neptune 4. This printer can go faster once the profile is tuned, but start conservative for clean walls.
- What retraction should I use?
- Use about 1.2 mm of retraction (direct drive needs very little). If you see stringing with Polycarbonate, raise retraction speed before distance and dry the filament.
- Do I need an enclosure for Polycarbonate on the Elegoo Neptune 4?
- Yes — Polycarbonate really wants an enclosure and the Elegoo Neptune 4 is open, so expect warping on large parts without one.