User Manual for NEPTUNE 4 PRO 3D Printer

Thank you for choosing ELEGOO product!

For your convenience, please read this instruction manual carefully before use. The cautions and tips in this manual can help you better avoid incorrect installation and use.

For questions or problems not covered in this manual, please contact ELEGOO at this email address: 3dp@elegoo.com.

The ELEGOO team is always ready to provide you with quality service.

To give you a better experience of our products, you can also gain knowledge of the operation of the equipment in the following ways:

1. The instruction manual: You can find related instructions and videos in the U disk.
2. ELEGOO official website: www.elegoo.com. You can go to our official website to find the relevant operating instructions for the machine and contact information.

Cautions

1. Do not place the printer in vibrating or other unstable environments, as the shaking of the machine will affect the print quality.
2. Do not touch the nozzle and heatbed when the printer is working to prevent high-temperature scald and personal injury.
3. After printing, please take advantage of the residual temperature of the nozzle and clean the filaments on the nozzle with the help of tools. Do not touch the nozzle directly with your hands during cleaning to avoid scald.
4. Please do product maintenance frequently, and regularly clean the printer body with a dry cloth to wipe away dust and sticky print material under the situation of power off.
5. 3D printers contain high-speed moving parts, so be careful not to get your hands caught.
6. Children must be supervised by adults when using the machine to avoid personal injury.
7. In case of emergency, please cut off the power directly.

Machine Parameters

Print Parameters

• Print Principle: FDM (Fused Deposition Modeling)
• Build Size: 225x225x265(mm³)
• Print Precision: ±0.1mm
• Nozzle Diameter: 0.4mm
• Print Speed: 30~500mm/s

Temperature Parameters

• Ambient Environment Temperature: 5°C~40°C
• Maximum Temperature of Nozzle: 300°C
• Maximum Temperature of Hotbed: 110°C

Software Parameters

• Slicer Software: Cura
• Input Format: STL, OBJ
• Output Format: Gcode
• Connection Type: U Disk, LAN

Power Supply Parameters

• Power Input: 100-120V/220-240V
• Power Output: 24V

Physical Parameters

• Machine Size: 475*445*515mm
• Net Weight: 8.9kg

Machine Structure Diagram

The diagram shows the main components of the ELEGOO Neptune 4 Pro 3D printer, including:

• Filament tube
• Filament holder
• Filament detector switch
• X-axis limit switch
• X-axis belt tensioner
• X-axis stepper
• Timing Pulley
• Lead Screws T8
• Rigid Coupling
• Nozzle kit
• Build platform
• Y-axis stepper
• Y-axis belt tensioner
• Touch screen
• Power Switch
• Network cable interface
• TF card interface (for firmware upgrade)
• Type-C interface (for system debugging)
• U disk socket

Packing List

Fasteners

• (HM5*45) 4pcs
• (PM4*45) 3pcs
• (PM4*20) 3pcs
• (PM4*18) 2pcs
• (PM3*16) 2pcs
• (PM3*8) 4pcs
• (PM4*8) 1pcs
• (HM4*M3*3) 1pcs

Tools

Various tools are included for assembly and maintenance.

Machine Installation

Attached U disk with an installation instruction video.

Print head installation:

Use two M3x16 screws to fix the print head through the holes of the cable fastener; two M3x8 screws to fix the underside of the print head.

Diagrams illustrate the steps for attaching the print head using specific screws.

Further diagrams show the installation of components labeled 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, using various fasteners.

Filament detector installation and Cable clamp installation are also detailed with diagrams and screw specifications.

A diagram shows the connection of various components to the main board, including:

• Filament detector switch
• X-axis limit switch
• X-axis stepper
• Z-axis stepper

Note: Before power on, please check and adjust the voltage to match the local voltage to avoid damage.

Operation Screen Introduction

The printer features a touch screen interface with several main screens:

• Main Interface: Displays basic information and provides access to other functions.
• Print Documents: For managing print files.
• Prepare Interface: Allows control over movement, temperature, and extruder settings.
• Settings Interface: For language switching, preset temperatures, fan control, motor unlock, filament detector control, restoring default parameters, machine information, and advanced settings.
• Level Interface: Displays temperature and compensation settings, including a 121-point parameter display for leveling.

Instructions for use of the rear cooling fan:

Users can click the fan icon to adjust the air outlet status of the rear cooling fan during the printing process. The fan has three modes: silent, normal, and sport. Please adjust according to the printing situation.

Diagrams show the interface for selecting fan modes and an illustration of the rear cooling fans, noting they can be turned off during silent printing.

Auto Leveling

When first running the machine, the distance between the platform and the nozzle needs to be calibrated in the leveling mode, which is about the thickness of a piece of A4 paper.

Steps for Auto Leveling:

• Select [Level] on the printer interface.
• The printer will automatically return to the home position. Place a piece of A4 paper between the nozzle and the platform.
• Click the compensation value to adjust the distance between the nozzle and the platform. Push and pull the A4 paper; when there is friction generated, the center point calibration is complete.
• Click the auxiliary leveling icon () to calibrate the 4 points of the platform using the A4 paper and hand-twisting nuts.
• After auxiliary leveling is completed, enter the automatic leveling () for automatic calibration.
• The machine will heat the nozzle to 140°C and the hot bed to 60°C (it is recommended to preset the hot bed temperature according to the filament used for more accurate leveling).
• After reaching the preset temperature, start the 121-point automatic calibration.
• After leveling is completed, set the Z-axis compensation by placing an A4 paper between the nozzle and the printing platform. Adjust the compensation value until friction is generated when pushing and pulling the paper.
• Click the save icon to save the settings.

Note: The leveling sensor only detects metal platform plates. Replacing the glass platform for leveling will not produce a detection effect and may cause the nozzle to squeeze the platform.

Diagrams illustrate the leveling process through different stages (P1, P2, P3, P4) and show the placement of A4 paper.

Model Test

Print Head Feeding Check

1. Push the filaments to the bottom of the print head.
2. Click [Prepare] -> [Extruder], click [Load]. The nozzle temperature will automatically heat to 200°C.
3. After preheating, click feed to extrude the filaments from the nozzle.
4. Clean the melted filament from the nozzle before printing.

Notice: Consumables with different hardness have different requirements for spring strength. The spring strength of the extruder can be adjusted with an Allen wrench. Turning counterclockwise increases spring strength, while turning clockwise decreases it.

Start printing

1. Insert the U disk into the printer's USB port.
2. Click [Print] on the main menu and select the model file.
3. When the nozzle and heatbed reach the preset temperature, the X, Y, Z axes will return to zero, and then printing will start.

Notice: Observe the first layer printing. In cases A and C, compensation settings are not properly adjusted. Compensation adjustments can be made during printing to adjust the distance between the nozzle and the platform. In case B, the nozzle and platform have reached a proper printing distance.

Diagrams illustrate three scenarios (A, B, C) showing nozzle-to-platform distance and extrusion quality.

Resume Printing Description

Power Loss Recovery

If printing is interrupted due to a sudden power outage or accidental power-off, this function allows you to continue printing. When the printer is reconnected to the power supply and turned on, simply click resume. Note that the PEI platform has better adhesion when heated, but if the power is off for too long, it may cool down, causing the model to fall off easily, and resume printing may not be possible.

Filaments Detection

This function reminds the user to replace filaments before continuing printing when the model is half-printed, preventing models from being scrapped due to insufficient consumables.

Diagrams show the interface for adjusting settings like Z-offset and moving distance, with tips for fine-tuning.

Software Installation

Tip: Copy the data in the U disk to the computer for saving.

The provided slice software is a modified version of Cura, optimized for ELEGOO machines.

Software installation steps:

1. Open the attached U disk file and navigate to the path: \ Software and Software Drivers folder \ ELEGOO Software folder.
2. Double-click the ELEGOO-Cura application to install it.
3. Follow the on-screen prompts to complete the installation.
4. Finally, select the corresponding ELEGOO model (e.g., ELEGOO NEPTUNE 4 PRO) to complete the settings.

Screenshots show the Ultimaker account login, adding a printer, and selecting the printer model.

Instructions for Use (ELEGOO Cura)

Other operation tips:

• Scroll the middle mouse wheel to zoom the viewpoint, and hold down the middle wheel to move the platform position.
• Press and hold the right mouse button to move the mouse to change the viewpoint.
• Clicking the right mouse button brings up a pop-up selection.

Model setting:

When printing multiple models, you can configure individual slice settings for each model.

Support structure interception:

You can set an intercept region on the model to prevent support structure generation in that area.

Preview image function:

G-code files saved in TFT format can be used to preview the model image on the printer, allowing for easier identification of print files.

Diagrams illustrate the Cura interface for model manipulation (move, zoom, rotate, mirror) and settings.

LAN Printing

After connecting the device to the network cable, power it on and check the IP address through the on-screen information. It is recommended to use Google Chrome for access.

Note: The machine and computer must be on the same network segment. Ensure the circuit wiring port on the machine is connected; otherwise, access will fail.

Diagrams show the network cable connection and the 'About Machine' screen displaying the IP address.

Use Google Chrome to enter the device's IP address (e.g., 192.168.211.164) to access the control interface.

The control interface includes sections for:

• Movement Control: Controls axis movement and post-leveling compensation.
• Fans and Output: Controls printhead fan and lighting.
• Printer Limit: Sets maximum acceleration (usually no need to change).
• Temperature Display: Shows machine heating conditions, preheating temperatures for nozzle and hot bed.
• Console: Allows sending G-code commands to run the machine.
• Task List: Drag G-code files from ELEGOO Cura here for printing.

Troubleshooting Guide

A stepper of the X/Y/Z axis is not moving or making a noise when zeroed

• Check if the stepper cable is loose and recheck the wiring connection.
• Verify the corresponding limit switch triggers properly, checking for interference and loose wires.

Nozzle kit extrude anomaly

• Ensure the extruder stepper cable is not loose.
• Check if the set screw of the extruder gear is locked to the motor shaft.
• Confirm the nozzle kit's cooling fan is working properly for adequate heat dissipation.
• For clogged nozzles, briefly heat the nozzle to 230°C and squeeze filaments by hand, or use a fine needle to unclog while warming up.

Model does not stick to the platform or warpage

• Ensure filaments attach to the platform during the first layer. If the nozzle-platform distance exceeds 0.2mm, it reduces model attachment and requires adjustment.
• Set the build platform attachment in Cura and select an attachment type (e.g., Brim) to enlarge the surface area and prevent warping.

Model misalignment

• Reduce travel speed or print speed if they are too fast.
• Check if the X/Y axis belt or synchronizer pulley is loose.
• Ensure the drive current is not too low.

Severe wire drawing

• Increase retraction distance when slicing.
• Increase retraction speed when slicing if it is too slow.
• When slicing, enable "Z Hop When Retracted" and set the Z Hop height to approximately 0.25mm.
• Reduce print temperature if it is too high, causing filaments to become sticky.

Circuit wiring

The diagram shows the main board connections for:

• X, Y, Z, E, E1 axis steppers
• Proximity switch
• Hotend thermosensitive (TH0)
• Model fan
• Lighting
• Model light
• Heating head interface
• Heatbed interfaces 1 and 2 (with thermosensitive TB1 and TBO)
• Power interface
• X- and Y- axis limit switches
• Filament detector
• Main board fan/print head fan
• Network cable interface
• U disk socket
• Screen interface
• Type-C interface
• TF Card slot

After-sales service registration card

Fields are provided for recording Date of purchase, Place of purchase, Printer model, S/N (Serial Number), Fault description, Contact person, Phone number, and Address.