Open-Source Concrete 3D Printer Launches: Built for Under $2,500, Field-Assembled and Repairable

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March 16, 2026 News 9576

Sunnyday Technologies has recently launched the M3-CRETE, a fully open-source concrete 3D printer designed specifically for field deployment and research validation.

The hardware design, CAD files, and bill of materials for this system have been made publicly available on GitHub, allowing developers to freely download, modify, and improve upon them.

The M3-CRETE is built around a standard pallet footprint (approximately 1.22m x 1.02m) and optimized for build volumes under one cubic meter. The system features a lightweight printhead (weighing just 1.5 kg) and a CoreXY gantry layout, equipped with a counterweighted material delivery system to maintain printing stability in dusty construction environments. The target system cost is controlled within $2,500, and its modular design facilitates easy transport and on-site assembly.

A key design highlight of this printer is its modular, swappable architecture, which allows the build volume to be scaled from 1 cubic meter up to 4 cubic meters. More importantly, it utilizes commonly available, off-the-shelf components, enabling rapid repairs even in austere locations with limited resources. This greatly enhances the feasibility of field deployment.

The M3-CRETE works in synergy with Sunnyday's CEMFORGE AI formulation platform. CEMFORGE leverages machine learning models to optimize cementitious composite formulations, providing the printer with perfectly adapted concrete mix designs. The company also offers comprehensive consulting services, covering everything from mix design and printability assessment to equipment selection.

Currently, Sunnyday is collaborating with universities in and near Wisconsin for early 2026 field tests. Interested groups are encouraged to contact the team via their official email and phone number. The release of this open-source project is expected to lower the technical barrier to entry for construction 3D printing and drive innovation within the industry.