3D Printing InfoBuild volume
320 x 320 x 385 mm; printing platform 330 x 330 mm
Advertised dimensions; check usable space and variants.
Sources & dates
- ELEGOO Neptune 4 Plus product page (full specification table) · 2026-08 · vendor
ELEGOO Neptune 4 Plus
320x320x385 mm Klipper bed-slinger with a titanium heatbreak, dual-fan direct extruder and a 121-point mesh, rated 500 mm/s.
Architecture reference
Start here
Explore this printer At a glance
Nozzle temperature
300 C claimed max nozzle temperature
Published limits; hardware and firmware limits may differ.
Sources & dates
- ELEGOO Neptune 4 Plus product page (full specification table) · 2026-08 · vendor
Price snapshot
$309.00 on us.elegoo.com, Aug 2026, against a compare-at price of $425.00. Only a Ribbon-Cable printhead variant is listed for the Plus, unlike the Neptune 4 and 4 Max which also offer a Type-C version
Dated listing, not a live offer. Read the configuration and region.
Sources & dates
A closer look
Full specifications inside each chapterHardware, software & ownership
Understand the hardware, explore compatible changes and find a diagnostic starting point when something goes wrong. Expand the specification sections for every recorded value, condition and original reference.
Machine & motion
Dimensions, construction and the hardware that moves the print.
Model, variants & pricing4 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Manufacturer & exact marketed model name (verify the exact product identity first) | ELEGOO Neptune 4 Plus | 1 source
|
| Release date (announcement and actual shipping) | Listed on the ELEGOO US store from 20 September 2023 (Shopify publish date), the same date as the Neptune 4 Max | 2 sources |
| Street price (USD; dated snapshot per entry) | $309.00 on us.elegoo.com, Aug 2026, against a compare-at price of $425.00. Only a Ribbon-Cable printhead variant is listed for the Plus, unlike the Neptune 4 and 4 Max which also offer a Type-C version | 3 sources |
| Variants & sibling models — and how to tell them apart (spec-contamination risk) | Middle model of the Neptune 4 family. Against the base Neptune 4: bigger (320 x 320 x 385 mm), but a lower bed ceiling (100 C rather than 110 C) and much lower acceleration (12000 rather than 20000 mm/s2). Against the Max: smaller and lighter (14.4 kg against 18.1 kg) but with a higher bed ceiling (100 C against 85 C) and higher acceleration (12000 against 8000). Its Z drive is 2 lead screws with 2 tie rods, where the Centauri machines use 3 lead screws | 4 sources
|
Size, frame & enclosure5 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Build volume X×Y×Z (mm) — advertised vs actually usable | 320 x 320 x 385 mm; printing platform 330 x 330 mm | 1 source
|
| Machine footprint (mm) & clearance needed (cable/spool overhang) | 533 x 517 x 638 mm; ELEGOO also publishes a maximum size for machine activity of 578 x 750 x 860 mm including rack and tray, so allow 750 mm of depth | 1 source
|
| Net weight (kg) | 14.4 kg net, 16.65 kg gross | 1 source
|
| Frame construction & material | CNC-machined aluminium extrusion frame (Neptune 4 family) | 1 source
|
| Enclosure: open / enclosed; panel material; door/lid | Open frame, no enclosure | 1 source
|
Y-rail spacing jig for bed wobble work
The creator provides paired jigs and a centering reference for setting the bed-rail spacing before adjusting the POM wheels. Measure the printed jig and correct for shrinkage before using it as a dimensional reference.
Applies to: Neptune 4 Plus only. The creator explicitly says this geometry does not fit Neptune 4 Max as supplied and has not been verified on Neptune 3 Pro.
Creator listing Sources & dates
- true: Neptune 4 Plus Y-rail spacing jig · Checked 2026-10-20
Motion system3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Kinematics (bedslinger i3 / CoreXY / other) | Cartesian i3 bed-slinger | 1 source
|
| Z-axis: leadscrew count & type, sync mechanism, anti-backlash | Two lead screws with two tie rods | 1 source
|
| Stepper drivers (exact model e.g. TMC2209; UART/SPI; sensorless homing?) | "Silent Drive (All Axes)" is all ELEGOO publishes; the driver part number is not given on the product page | 1 source
|
Speed & acceleration3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Max print speed (claimed, mm/s) | 30-500 mm/s printing speed, with 250 mm/s given by ELEGOO as the recommended figure - the 500 mm/s number is a ceiling, not a working speed | 1 source
|
| Recommended/typical print speed | 250 mm/s recommended printing speed (manufacturer figure) | 1 source
|
| Max acceleration (claimed, mm/s²) | 12000 mm/s2 maximum acceleration; default acceleration 5000 mm/s2 | 1 source
|
Printing system
Extrusion, heating, leveling and material handling.
Extruder1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Type (direct drive / bowden) & design name | Dual-gear direct extruder with 2 fans (the Centauri machines use a 1-fan version) | 2 sources
|
Feeding stops: inspect cooling and gearbox before replacing parts
The clogging guide checks filament/profile agreement, heat-break fan operation, gearbox debris and worn PTFE/nozzle parts. It specifies that the heat-break fan should start above 50 °C and requires a new Z offset and leveling after nozzle or PTFE replacement.
Applies to: Neptune 4 Plus; the source explicitly identifies Plus/Max custom nozzles. Do not substitute a Neptune 4/4 Pro nozzle or assume another hotend’s PTFE dimensions.
Official troubleshooting Sources & dates
- ELEGOO Neptune: nozzle-clogging diagnostic sequence · Checked 2026-10-20
FlowTech hotend alternative
The M3108 kit replaces the Neptune 4 Plus / 4 Max hotend with a matched heater/thermistor assembly and the FlowTech nozzle system, which permits cold nozzle changes. Follow the kit installation and recalibrate for the installed nozzle and filament.
Applies to: Original Neptune 4 Plus/Max; select M3108 rather than the shorter Neptune 4/Pro kit. New Plus+/Max+ revisions are not established here.
Manufacturer documentation Sources & dates
- Micro Swiss: FlowTech for Neptune 4 Plus / 4 Max · Checked 2026-10-20
Hotend & nozzle2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Hotend design (proprietary/standard; quick-swap mechanism?) | Brass nozzle, 0.4 mm, with a titanium-alloy heat break | 1 source
|
| Max nozzle temp claimed AND firmware max temp limit (both values) | 300 C claimed max nozzle temperature | 1 source
|
Build plate & heating2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Max bed temp claimed AND firmware limit | 100 C max heated bed temperature at 25 C ambient | 1 source
|
| Bed surface (material, texture, coating), single/double-sided | PEI spring steel sheet; ELEGOO notes it is now upgraded to a dual-sided textured PEI + PLA-specific surface | 1 source
|
Leveling & Z-offset1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Auto bed leveling: probe technology (inductive / strain gauge / load cell / touch probe) | Manual levelling combined with 121-point auto-levelling | 1 source
|
Cable-chain and spine assembly
The creator bundles the printed links, mounting pieces and spine parts used on their Neptune 4 Plus to route the printhead cable. Read the included component origins and installation geometry before combining remixes.
Applies to: Neptune 4 Plus setup shown by the creator; not an automatic fit for the Max or machines with aftermarket rail kits.
Creator listing Sources & dates
- Tony Currie: Neptune 4 Plus cable chain and spine · Checked 2026-10-20
Filament handling1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Filament runout sensor (type, location) | Filament run-out sensor and power-loss recovery; no camera, no clog detection, no auto filament unloading | 1 source
|
Supported materials1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Officially supported filament list | PLA, TPU, PETG, ABS, ASA, Nylon | 1 source
|
Software & workflow
Firmware, controls, connections and calibration.
Electronics & power2 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Mainboard model & MCU (exact chip markings if teardowns exist) | ELEGOO describes it only as a "Klipper High-Speed Quiet Motherboard" - no board model or MCU is published | 1 source
|
| Total rated power draw | 320 W rated power; 24 V output; 110-120 V / 220-240 V input | 1 source
|
OpenNept4une replacement software stack
OpenNept4une replaces the factory software with an updatable Armbian and Klipper stack and supplies printer configurations and calibration tools. Back up the original eMMC image and configuration before following the installation guide.
Applies to: Original Neptune 4 Plus; choose its exact board/model image. New Plus+ and Max+ revisions require separate confirmation; stock update packages are not interchangeable.
Maintainer documentation Sources & dates
- OpenNept4une maintainer installation and supported models · Checked 2026-10-20
Firmware & openness1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Firmware base & current version (Klipper fork / Marlin fork / proprietary) | Klipper (ELEGOO names the system "Klipper" outright for the Neptune 4 Plus, rather than the ELEGOO OS branding used on the Centauri machines) | 2 sources
|
Connectivity, display & camera3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Display: size, type, touch? | 4.3-inch colour capacitive touch screen | 1 source
|
| On-device UI capabilities (model preview, per-object controls, etc.) | Colour capacitive touch UI; ElegooSlicer is recommended, with Orca and Cura also supported | 1 source
|
| WiFi (band/standard), Ethernet, USB ports, SD/flash-drive | USB, LAN and Wi-Fi | 1 source
|
Safety, support & testing
Published safeguards, support terms and independent evidence.
Noise & power consumption1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Noise: claimed dB and independently measured dB (distance/method) | Operating sound is published as 65 dB or less - a manufacturer figure with no measuring distance or method given, so it is not comparable with a reviewer's dB reading | 1 source
|
Support & ecosystem1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Warranty length & support reputation (evidence, not vibes) | 12 months on brand-new machines and parts, but ELEGOO's own table excludes a long list of parts from that: PEI plate / build plate / nozzle kit / PTFE tube / heater / thermistor / hot end / packaging / manual / tools carry no warranty at all, and the extruder, extruder kit and printhead kit get 6 months. Certified pre-owned machines carry no warranty | 1 source
|
Read with context
Sources & notes
How to read this guide
This guide presents the catalog’s sourced record for this exact model. Source dates belong to each reference; a page update does not mean every specification has been rechecked.
Prices are dated listing snapshots, with configuration, regional and sale conditions. They are not current offers. Unknown values remain unfilled.
Firmware, variants and available accessories can change. Read the original reference before making a purchase or planning a process.
Catalog references8 sources
- ELEGOO Neptune 4 Plus product page (full specification table) · 2026-08 · vendor
- ELEGOO Neptune 4 Plus Shopify product JSON (variant prices and store publish date) · 2026-08 · vendor
- ELEGOO Neptune 4 Max Shopify product JSON (variant prices and store publish date) · 2026-08 · vendor
- ELEGOO Neptune 4 Shopify product JSON (variant prices and store publish date) · 2026-08 · vendor
- ELEGOO Neptune 4 product page (Specification table) · 2026-08 · vendor
- ELEGOO Neptune 4 Max product page (Specification table) · 2026-08 · vendor
- ELEGOO Centauri Carbon product page (full specification table) · 2026-08 · vendor
- ELEGOO Refund & Warranty policy (warranty period table) · 2026-08 · vendor
Ownership research & coverage
Firmware, modifications and troubleshooting links are checked against the model and stated hardware or firmware revision. A creator’s compatibility claim is not a fit test by this site. Official troubleshooting describes a diagnostic route; individual reports do not establish a failure rate.
- OpenNept4une maintainer installation and supported models · Checked 2026-10-20
- Tony Currie: Neptune 4 Plus cable chain and spine · Checked 2026-10-20
- Micro Swiss: FlowTech for Neptune 4 Plus / 4 Max · Checked 2026-10-20
- true: Neptune 4 Plus Y-rail spacing jig · Checked 2026-10-20
- ELEGOO Neptune: nozzle-clogging diagnostic sequence · Checked 2026-10-20