Sunnyday Technologies has released M3-CRETE, an open-source 3D concrete printer designed for field use across various work environments. The system features modular architecture that can scale from 1 cubic meter to 4 cubic meters using swappable components. The draft bill of materials is now available on GitHub for customization and community feedback.
The company is collaborating with universities in and near Wisconsin to provide in-person support for field-test units planned for 2026. The printer targets applications including hardscape elements, agricultural infrastructure, water control components, and modular construction parts. The system is built using common components to enable rapid repairs in remote locations.
M3-CRETE operates on open standards to avoid proprietary limitations. It works with established slicing software including Cura, OrcaSlicer, and PrusaSlicer, though users will need to adjust nozzle size settings. The printer runs on open-source firmware such as Marlin or Klipper and uses standard extrusions, motors, and controls.
The design prioritizes field serviceability and maintenance using robust, standard parts. Sunnyday Technologies developed the system for users working in parametric architecture, additive construction, and distributed manufacturing, as well as individuals looking to print construction blocks for residential applications.
Source: sunn3d.com
