Setting up automatic bed levelling on an FDM 3D printer works best as a controlled preparation routine, not a one-button cure for every first-layer issue. Start with a clean, correctly assembled machine, understand the model's levelling sequence and verify the result with a simple print.

Quick Answer

The Neptune 4 Plus automates bed levelling, then uses its double-sided PLA and textured PEI plate to match adhesion with the chosen material.

At R7,799, the ELEGOO Neptune 4 Plus includes automatic bed levelling across a 320 x 320mm area. Prepare the bed, run the model-specific routine, set the initial layer as directed and print a broad test before committing to a tall or wide job.

Abstract diagram of levelling waves and an even first layer

🧽 Prepare the Print Surface

Let the printer reach a normal, stable starting condition and remove leftover filament or debris from the build area. Identify which supplied face is active: specialised PLA coating or textured PEI. Use a cleaning method suited to that surface before applying solvents, tools or adhesion products.

Check that the nozzle area is free of hardened residue that could interfere with the distance to the surface. The Neptune 4 Plus has a 300C nozzle, but levelling preparation should use the machine's proper handling and temperature procedure rather than the maximum as a default.

Keep the build area clear and make sure the printer sits on a suitable workspace. The 320 x 320 x 385mm build volume describes printable space, not the machine's external footprint or required access clearance.

🎯 Run the Correct Routine

Automatic bed levelling is part of the Neptune 4 Plus feature set. Confirm the exact controls, sensing method and any user steps for this model before beginning. Do not borrow probe, mesh or adjustment instructions from a different printer simply because both use the word automatic.

Allow the routine to finish without touching the bed or frame. If the printer requires an initial height or offset step, follow its own sequence. Saving an unrelated value can undermine the next test even when the levelling cycle itself completes.

Buyers comparing the broader category can browse large 3D printers at Evetech with levelling procedure and bed size on the checklist.

🧪 Verify the First Layer

Use a low-risk pattern that reaches several parts of the bed. Watch whether adjacent lines meet consistently and whether material is being placed rather than dragged or left loose. Stop the test if the nozzle or surface appears at risk.

Automatic levelling cannot guarantee a perfect layer because surface condition, initial settings, material flow and the selected filament profile still matter. Change one variable at a time after the test so the cause remains visible.

Choose a known spool from Evetech's 3D printing filament range, then follow the material maker's full printer and temperature requirements.

📋 Build a Repeatable Baseline

Record the successful preparation order, model-specific levelling command and test result. Repeat the routine when the machine's own guidance calls for it or after a physical change that affects the bed relationship.

Explore Evetech's wider 3D printer selection when comparing automation with build volume, extrusion and firmware.

Only move to a large print after the sample layer is acceptable across the needed area. The machine also offers direct drive extrusion and Klipper firmware, but those features do not remove the need to establish a sound first-layer baseline.

Clean the selected plate face, run the printer's levelling routine and set the first layer before filling the 320 x 320mm area. Use the specialised low-temperature PLA surface for PLA; turn to textured PEI for materials such as ABS, TPU and carbon-fibre blends. Print a broad grid and correct only the remaining offset or flow issue.

After the first-layer grid passes, store the working offset beside the plate face and material. The printer's X/Y resonance sensors and pressure-advance tools solve different motion issues, so they should not be used to compensate for poor bed contact. A reliable base layer comes before high-speed calibration.

Frequently Asked Questions

What should happen before automatic levelling?

Prepare a clean surface using the correct plate method, inspect the nozzle area and confirm the exact model-specific levelling sequence.

Does the Neptune 4 Plus include auto bed levelling?

Yes. The feature covers the printer's 320 x 320mm build area and remains one stage of complete first-layer preparation.

What should guide the levelling process?

Use the Neptune 4 Plus controls and operating instructions rather than assuming a probe type, mesh size or process from another machine.

How can the result be checked?

Print a broad, simple first-layer pattern and compare line contact across the region that the next job will occupy.

Does levelling guarantee a perfect first layer?

No. Surface condition, initial height, material flow and profile choices can still alter the deposited layer after levelling.

What build height accompanies the levelled area?

The printable height is 385mm, completing a 320 x 320 x 385mm build volume for parts that fit all three axes.

Ready to establish a repeatable first-layer routine? Compare auto-levelling 3D printers at Evetech with the exact bed process, test pattern and material route mapped first.