Customisation is one of the most important topics in architecture, as architects generally work on individual prototypes instead of mass-produced designs. By using customised design and fabrication tools, architects are able to individually respond to challenges, instead of relying on universal software tools. This paper proposes new software components for interfacing industrial robots with physical computing microcontrollers, thereby allowing the customisation of physical tools for industrial robots. By pairing physical computing with rapid prototyping, architects are able to design and prototype individual fabrication processes for industrial robots.