The Neptune 4 Max 3D printer from Elegoo is a large-format FDM (Fused Deposition Modeling) 3D printer designed for makers, hobbyists, and professionals requiring substantial build volume. It features a maximum build volume of 420 mm in width, 420 mm in depth, and 480 mm in height, enabling the creation of large single-piece models or multiple smaller items in a single print job. The printer utilizes a direct-drive extruder system with dual-gear feeding for reliable filament handling, supporting various materials including PLA, PETG, ABS, and TPU. It operates with a heated print bed that reaches up to 100 °C, enhancing adhesion and reducing warping for materials requiring higher temperatures.

The Neptune 4 Max incorporates a dual-lead screw Z-axis design and linear rails on the X and Y axes to ensure stable and precise movement during printing, contributing to consistent layer quality. It includes a magnetic flexible build plate for easy print removal and maintenance. The printer is equipped with a 4.3-inch color touchscreen interface for straightforward operation and monitoring, supporting connectivity via USB and microSD card. It features automatic bed leveling with a 121-point mesh system to compensate for minor surface irregularities, promoting first-layer accuracy.

The maximum print speed is rated at 500 mm/s, though optimal results are typically achieved at lower speeds depending on the material and model complexity. The printer's frame is constructed from aluminum alloy for durability and rigidity, with overall dimensions of approximately 600 mm in width, 600 mm in depth, and 700 mm in height, and a net weight of around 18 kg. It requires assembly upon delivery and is intended for indoor use in well-ventilated areas. The Neptune 4 Max is a successor model in Elegoo's Neptune series, offering expanded capabilities for users seeking a reliable large-format 3D printing solution.