"POLYHEDR.A" has been accepted to be presented at Rob|Arch 2018 (robarch2018.org) through the Rob|Arch 2018 Call for Videos.
POLYHEDR.a, (Irregular polyhedra automatic Constructor) is a recursive parametric system originally developed by ALO Co.Re.+D (Computational Research and Design division). Starting from the digital faceted skin of an irregular polyhedral morphology with zero thickness, the parametric system digitally builds the 3D geometry of each face as well as all fabrication and assembly vectorial features necessary to fabricate and assembly the artefact. Most noteworthy, the system can process morphologies that feature more than three faces meeting in one node and convex-concave shape.
After setting up the thickness of the building material (i.e. 15mm plywood), the system calculates the bisector planes. Then it builds the Quartabuono joint (a.k.a mitre joint); defines the position of the dowels between adjacent faces; sets the position of the connection fasteners between building sub-modules and places the tags on the faces (both part's tag and adjacent neighbours' ones) to drive the fast and "blind" assembly
(without traditional 2D drawings) done by hands.
Finally, the system unfolds the pieces in 2D ready for the robotic 6-axis manufacturing. Above all, POLYHEDR.a orients the parts in 2D as to obtain a consistent direction of the grain of the wood panels along the final artefact. This advanced feature ensures a subtle and organic monolithic effect for the natural wood finishing.
POLYHEDR.a has a brother, POLYHEDR.a/r which allows to develop polyhedral formworks to cast concrete components; both versions facilitated the design for the renovation project of the Fine Guest House Villa Vi.
M.Verde, Project Director and Main Designer
G.Lai, R.Madeddu Robotic Manufacturing Assistants