Polycarbonate on the Elegoo Neptune 4
Yes, but it takes extra gear or care. Open budget machine with a big following and Klipper speed.
Polycarbonate is tricky on the Elegoo Neptune 4
No enclosure on this printerPrinter
The Elegoo Neptune 4 is open to the room, and Polycarbonate warps and cracks in open air. Small parts can survive; for anything bigger, add an enclosure (even a grow tent or a box over the printer helps).
Use the lower end of the bed rangePrinter
Some Polycarbonate spools ask for up to 120 °C on the bed; the Elegoo Neptune 4 reaches 110 °C. Set the bed near 110 °C and add a glue stick if corners lift.
Keep the spool dryMaterial
Polycarbonate soaks up moisture from the air, and damp filament prints rough and stringy. If that happens, dry the spool at 80-90 °C for 6-8 h and store it sealed with desiccant.
Buying the CF version of Polycarbonate?
Carbon-fiber filament sands down the Elegoo Neptune 4’s stock nozzle. Plain Polycarbonate is fine; for the CF variant, fit a hardened steel nozzle first (a cheap swap).
Safe starting ranges for Polycarbonate as a family, not gospel. Each spool below has its exact manufacturer numbers, the dated source, and one-click slicer settings on its page.
Top Polycarbonate picks for the Elegoo Neptune 4
Editor-tested spools and Elegoo's own line: start here.
More Polycarbonate spools
54 Polycarbonate filaments in the catalog, popular brands first. See the full Polycarbonate list.