Open design files
CAD, BOM source data, firmware references, license files, and build documentation remain available through the M3-CRETE GitHub repository.
Qualified Technical Users // Open Hardware // Commercial Support
Concrete.
Printed.
Open.
M3-CRETE is an experimental open-hardware concrete/paste-printing motion reference for qualified technical teams working in controlled R&D, laboratory, or supervised institutional settings. It is not a consumer product, hobby kit, finished machine, certified construction printer, validated field-use system, or structural concrete production system.
Commercial Surface, Open Technical Core
The technical design remains open on GitHub. This site handles customer qualification, support scope, safety boundaries, professional-use acknowledgement, and commercial communication.
Qualified early access
Sunnyday is accepting inquiry-only conversations with qualified teams interested in controlled evaluation and useful build feedback. Acceptance, configuration, availability, and terms require separate written agreement.
Clear support boundary
If offered, paid support, supplied components, software access, or integration work must be separately scoped, quoted, and accepted in writing. Public pages create no entitlement or commitment.
What M3-CRETE Is For
Potential evaluation contexts include controlled research, product development, non-structural specimens, forms, molds, process-development articles, and supervised institutional work. This list does not establish suitability for any use; each material, machine, process, output, workspace, and operator plan requires independent review and physical validation.
Research and education
Use a documented, modifiable platform for concrete additive manufacturing coursework, laboratory investigation, and grant-supported research.
Materials and process testing
Design controlled experiments around candidate mixes, toolpaths, printability observations, and workflow assumptions. Results depend on the actual configuration, protocol, materials, environment, and physical evidence.
Product development
Explore non-structural prototypes, molds, forms, or process fixtures only within a qualified test plan. Publication does not establish accuracy, durability, field suitability, or product readiness.
Safety Boundary
M3-CRETE is an experimental development reference for professional-use evaluation. Any physical implementation requires competent mechanical, electrical, controls, safety, and concrete/paste-printing judgment.
Sunnyday does not provide public AC mains wiring instructions, control-panel build instructions,
facility-connection instructions, safety-rated emergency-stop circuit designs, or code-compliance
instructions. Any electrical power system, control panel, grounding/bonding system, disconnect,
overcurrent protection, emergency-stop power circuit, machine guarding, facility connection,
inspection, certification, field evaluation, or AHJ review must be designed, built, inspected,
and accepted by qualified professionals for the specific installation and intended environment.
This is a portfolio and proposed workflow map, not an automated closed loop, validated integration, supplied dataset, or claim that one surface certifies another.