A Copernican Revolution in Digital Fabrication: Handheld CNC for 2D

By admin / 09/05/2012 / Core77

As with many of my fellow fledgling philosophy students, I was awed by Kant’s so-called “Copernican Revolution”: in order to reconcile the epistemological conflict between rationalism and empiricism, Kant determined that we experience the world from a point-of-view, as dictated by a priori categories of space, time, causality, etc. Thus, our unique ability to know and learn about the world as it is given to perception comes at the expense of the naïve belief that we could somehow discern its essence.

Just as it’s only a loose (possibly even backwards) metaphor for the dawn of modern Western philosophy, we’re taking some liberties with both the Renaissance astronomer’s hypothesis and its Kantian canonization here. Where Computer Numerical Control (CNC) devices have long been restricted by the size of a multiple-axis stage, a team of engineers and designers are looking to put digital fabrication tools squarely in the hands of the users. Don’t the let academic title fool you: “Position-Correcting Tools for 2D Digital Fabrication” by Alec Rivers (MIT CSAIL), Ilan E. Moyer (MIT MechE) and Frédo Durand (MIT CSAIL) might just represent the next step for digital fabrication. Per the abstract:

Many kinds of digital fabrication are accomplished by precisely moving a tool along a digitally-speciﬁed path. This precise motion is typically accomplished fully automatically using a computer controlled multi-axis stage. With that approach, one can only create objects smaller than the positioning stage, and large stages can be quite expensive.

We propose a new approach to precise positioning of a tool that combines manual and automatic positioning: in our approach, the user coarsely positions a frame containing the tool in an approximation of the desired path, while the device tracks the frame’s location and adjusts the position of the tool within the frame to correct the user’s positioning error in real time. Because the automatic positioning need only cover the range of the human’s
positioning error, this frame can be small and inexpensive, and because the human has unlimited range, such a frame can be used to precisely position tools over an unlimited range.

Made in the USA

In other words, they’re looking to combine the best of both worlds: “our goal is to leverage the human’s mechanical range, rather than decision making power or guidance, to enable a new form factor and approach to a task that is currently fully automated.”