selectivelasermelting
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3D-printed music scores help the blind feel every note
It's increasingly apparent that schools can do exceptional things when you give them 3D printers. Need proof? The University of Wisconsin's Mechanical Engineering department is using its advanced selective laser sintering printer to make a wide range of intricate projects, including 3D music scores for the blind. The creation replaces Braille (which sometimes omits crucial details in music) with extruded versions of the same notes you see on regular sheets -- you can interpret those arpeggios in the same way as any other performer, rather than learn a separate system. The university is still refining the concept, so it may take a while before blind virtuosos are using 3D sheets in concerts. You'd need an easy way to mass-produce them, for one thing. If the technology pans out, though, it could open doors for vision-impaired artists. [Image credit: Scott Gordon]
NASA building Space Launch System with laser melting, adapts 3D printing for the skies (video)
As we know it, 3D printing is usually confined to small-scale projects like headphones. NASA is ever so slightly more ambitious. It's using a closely related technique from Concept Laser, selective laser melting, to build elements of its Space Launch System on a pace that wouldn't be feasible with traditional methods. By firing brief, exact laser pulses at metal powder, Concept Laser's CAD system creates solid metal parts that are geometrically complex but don't need to be welded together. The technique saves the money and time that would normally be spent on building many smaller pieces, but it could be even more vital for safety: having monolithic components reduces the points of failure that could bring the rocket down. We'll have a first inkling of how well laser melting works for NASA when the SLS' upper-stage J-2X engine goes through testing before the end of 2012, and the printed parts should receive their ultimate seal of approval with a first flight in 2017.
