Picking between two FDM lines usually comes down to few practical questions: how big a model needs to be, how fast it should print, and whether multiple colors matter. A clear 3D printer series comparison helps separate what each ELEGOO line is actually built for before settling on a machine. ELEGOO maintains two distinct FDM families, the Neptune series and the Centauri series, and each targets a different kind of printing project.
Understanding the Neptune Series FDM Printers
The Neptune series spans several models, including Neptune 4, Neptune 4 Pro, Neptune 4 Plus, and Neptune 4 Max, and each is listed with printing speeds of up to 500mm/s. Every model ships with pre-installed Klipper firmware, which supports input shaping and pressure advance for tuning print quality. The Neptune 4 Pro adds an Intelligent Segmented Heatbed alongside auto bed leveling, while the base Neptune 4 relies on 121-point auto bed leveling for consistent first layers.
Older Neptune 3 models, such as the Neptune 3 Plus and Neptune 3 Max, use different leveling counts, with the Neptune 3 Plus featuring 49-point auto bed leveling. ELEGOO builds every model in the Neptune 4 generation around a dual-gear direct extruder matched to a 300℃ high-temperature nozzle, a pairing meant for standard filament types that need that heat ceiling. That consistency across the line makes the Neptune series a recognizable family even as build volumes scale up.
Exploring the Centauri Series and Its Multicolor Capabilities
The Centauri series takes a different approach, centering on multicolor and multi-material printing through CoreXY motion systems paired with auto-calibration. ELEGOO lists the Centauri Carbon 2 Combo as a multicolor printer that combines smart auto calibration with a hardened nozzle rated to 350°C, extending its reach into filaments that need more heat than the Neptune ceiling allows. The standard Centauri Carbon 2 also features multi-material freedom and auto-calibration, positioned for both casual and more involved use.
The Centauri 2 and Centauri 2 Combo focus specifically on four-color printing, with the Combo variant described as making vibrant four-color output simple and accessible. Both rely on CoreXY mechanics paired with smart auto-calibration for setup and leveling. This puts multicolor output at the center of the Centauri lineup in a way the Neptune series does not address.
Build Platform Size and Printing Volume Across Both Lines
Neptune models range widely in build volume. The Neptune 4 and Neptune 4 Pro share a 225x225x265mm printing size, the Neptune 4 Plus steps up to 320x320x385mm, and the Neptune 4 Max reaches 420x420x480mm. The older Neptune 3 Max offers a printing size of 420x420x500mm, which remains one of the larger volumes across the Neptune catalog.
Centauri printing volumes are not detailed to the same granularity in the available specifications, with the series instead emphasizing calibration and surface options. ELEGOO sells a dual-sided etched build plate as an accessory for the Centauri series, adding carbon fiber and honeycomb textures for different finish effects. Comparing these two lines on volume alone shows the Neptune series offers more explicit size options to pick from.
Print Speed and Performance: Neptune 4 vs. Centauri Models
Speed is one area where both lines converge on similar numbers. The Centauri Carbon 2 Combo is rated at up to 500 mm/s, matching the Neptune 4 family and showing that high-speed printing is not exclusive to one series. That overlap is a useful anchor point in any 3D printer series comparison focused purely on throughput.
Where the lines diverge is in how that speed is delivered. Neptune models pair their speed rating with Klipper firmware tuning, while Centauri models combine speed with CoreXY motion and auto-calibration aimed at multicolor accuracy. For a printer comparison based on raw speed figures alone, the two lines land close together rather than one clearly outperforming the other.
Material Compatibility and Nozzle Temperature Ratings
Nozzle temperature ratings separate the two lines more clearly than speed does. ELEGOO‘s filament catalog includes PLA variants such as PLA Basic, PLA Plus, PLA-CF, and PLA Matte, alongside PETG options including PETG Rapid, PETG-CF, and PETG-GF, as well as TPU and ASA materials.
Because the Centauri Carbon 2 Combo reaches a higher nozzle temperature than the Neptune 4 line, it extends further into reinforced and composite filaments than models built around the 300℃ ceiling. That distinction matters for anyone narrowing a 3D printer series comparison down to intended material range rather than speed alone.
Which ELEGOO Series Matches Different Making Workflows
Workflow fit depends largely on whether multicolor output or build volume matters more. The Neptune series, with its range of printing sizes from the compact Neptune 4 up to the large-format Neptune 4 Max, suits projects where scaling print dimensions is the priority. Klipper firmware across the Neptune 4 line also gives more direct access to speed and motion tuning.
Projects that depend on combining several filament colors or materials in one print point toward the Centauri models instead, since CoreXY frames and auto-calibration are built around that kind of output. A useful 3D printer series comparison ultimately rests on matching these structural differences to the kind of output a project calls for, rather than treating the two lines as interchangeable. The current lineup, including accessories such as the dual-sided etched build plate, is listed on the ELEGOO site.
- Neptune 4 and Neptune 4 Pro share a 225x225x265mm build volume, while the Neptune 4 Max reaches 420x420x480mm.
- Neptune 4 series printers use a 300℃ nozzle, while the Centauri Carbon 2 Combo uses a hardened nozzle rated to 350°C.
- Neptune 4, Neptune 4 Pro, Neptune 4 Plus, Neptune 4 Max, and the Centauri Carbon 2 Combo are all listed with printing speeds of up to 500mm/s.
- The Neptune 4 uses 121-point auto bed leveling, while the Neptune 3 Plus uses 49-point auto bed leveling.
- Centauri Carbon 2 and Centauri Carbon 2 Combo feature smart auto-calibration paired with multicolor and multi-material printing support.
Both lines keep expanding, and the gap in nozzle heat, build size, and color handling gives a solid basis for sorting one from the other.