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 collecting inquiries from technical teams that can safely evaluate a development platform and provide useful build feedback.
Clear support boundary
Commercial support, supplied components, software access, and any electrical enclosure work must be quoted and scoped in writing.
What M3-CRETE Is For
M3-CRETE is positioned for controlled research, product development, non-structural specimens, forms, molds, process-development articles, and supervised institutional evaluation. It is not sold as a finished construction machine or structural-output guarantee.
Research and education
Use a documented, modifiable platform for concrete additive manufacturing coursework, laboratory investigation, and grant-supported research.
Materials and process testing
Evaluate cementitious mixes, toolpaths, printability windows, and workflow assumptions on a repairable Cartesian gantry.
Product development
Prototype non-structural printed objects, molds, hardscape forms, and process fixtures before committing to larger industrial systems.
Safety Boundary
M3-CRETE is professional-use equipment in development. It 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.
