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The Elegoo Neptune 4 Max is a large-format FDM printer with a 420x420x480 mm build volume, aimed at makers printing big models or full plates of smaller parts. It runs Klipper firmware out of the box with input shaping and pressure advance, and ships with X/Y acceleration sensors for automatic calibration. A dual-gear direct extruder with a 5.2:1 reduction and a 300°C hot end handle PLA, PETG and higher-temp filaments. Against its main large-bed rivals it stands out on speed and calibration automation, but its size and moving bed make it a machine you set on a sturdy bench and tune carefully.
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Owners of the Neptune 4 series generally rate the line well for build volume and speed for the money, and the Max carries that reputation to a much larger bed. The common caveats are that the big moving bed needs careful leveling and slower real-world speeds than the headline figure.
The Elegoo Neptune 4 Max is an FDM 3D printer with a 420x420x480 mm build volume (16.53x16.53x18.89 inches). The space fits large models or several smaller objects in one print.
It runs pre-installed Klipper firmware. The firmware supports input shaping and pressure advance. Acceleration sensors on the X and Y axes handle automatic calibration.
The dual-gear direct extruder has a 5.2:1 reduction ratio, and its full titanium alloy throat pipe improves heat dissipation. The nozzle kit reaches 300°C and uses a 60W ceramic heating element with a brass heating block. Nozzle PID parameters calibrate automatically. Auto bed leveling probes 121 points (11x11), and hand-twist knobs allow auxiliary leveling.
