Hypotrochoid-drawing robot
Agnewgraph I is a device that traces Spirograph curves (technically, hypotrochoids). Unlike other systems that compute and plot hypotrochoids mathematically, Agnewgraph I operates a physical Spirograph much as a human being does. In order to do so, Agnewgraph I contains two electromechanical subsystems–a force-sensing pen and a pen transport mechanism–plus a Parallax Propeller chip as […]