At The Register, Professor James Woudhuysen looks at the gap between the breathless hype about 3D printing and the current and near-term technological, political, and legal limitations:
3D printing, otherwise known as additive manufacturing, is a subject that pumps out enthusiasts faster than any real-life 3D printer can churn out products.
In conventional machining, computer-aided design and computer-aided manufacturing (CADCAM) combine to make products or parts of products by cutting away at, drilling and otherwise manhandling materials. With 3D printing, CADCAM works with product scanners, other bits of IT and special plastics and metals to build products up, whether through the squirts of an inkjet-like device or the sintering of metal powder by lasers or electron beams.
Rather in the same way, America’s somewhat self-conscious Maker Movement — several thousand DIY fans out to revive manufacturing through the web and from the privacy of their own garages — promotes 3D printing with layer upon layer of hype.
It’s true that 3D printing has its good points. Without having to engage in expensive retooling, a 3D printer can easily be reprogrammed to make variations on a basic product — good for dental crowns, for example. 3D printing can also make intricate products with designs that cannot be emulated by conventional, “subtractive” techniques.
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Despite all this, those who blithely proclaim that 3D printing brings a revolution to manufacturing make a mistake. 3D printing does not represent a pervasive, durable and penetrating transformation of the dynamics and status of manufacturing. Nor, as The Economist newspaper has proposed, is its emergence akin to the birth of the printing press (1450), the steam engine (1750) or the transistor (1950). There is much to celebrate about 3D printing, and even its too-fervent advocates at least represent a reasonable desire to produce new kinds of things in new kinds of ways. Yet what characterises 3D printing is how, as with other powerful technologies today, it need only barely arrive on the world economic stage for zealots to overrate it, and for others to turn it into an object of fear.
