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Nasa preparing to launch 3D printer into space

30 September 2013, 13:56

Moffett Field - Nasa is preparing to launch a 3D printer into space next year, a toaster-sized game changer that greatly reduces the need for astronauts to load up with every tool, spare part or supply they might ever need.

The printers would serve as a flying factory of infinite designs, creating objects by extruding layer upon layer of plastic from long strands coiled around large spools. Doctors use them to make replacement joints and artists use them to build exquisite jewellery.

In Nasa labs, engineers are 3D printing small satellites that could shoot out of the Space Station and transmit data to earth, as well as replacement parts and rocket pieces that can survive extreme temperatures.

"Any time we realise we can 3D print something in space, it's like Christmas," said inventor Andrew Filo, who is consulting with Nasa on the project. "You can get rid of concepts like rationing, scarce or irreplaceable."

The spools of plastic could eventually replace racks of extra instruments and hardware, although the upcoming mission is just a demonstration printing job.


"If you want to be adaptable, you have to be able to design and manufacture on the fly, and that's where 3D printing in space comes in," said Dave Korsmeyer, director of engineering at Nasa's Ames Research Centre at Moffett Field, about 55km south of San Francisco.

For the first 3D printer in space test slated for fall 2014, Nasa had more than a dozen machines to choose from, ranging from $300 desktop models to $500 000 warehouse builders.

All of them, however, were built for use on Earth, and space travel presented challenges, from the loads and vibrations of launch to the stresses of working in orbit, including microgravity, differing air pressures, limited power and variable temperatures.

As a result, Nasa hired Silicon Valley start-up Made In Space to build something entirely new.

"Imagine an astronaut needing to make a life-or-death repair on the International Space Station," said Aaron Kemmer, CEO of Made in Space. "Rather than hoping that the necessary parts and tools are on the station already, what if the parts could be 3D printed when they needed them?"

When staffing his start up in 2010, Kemmer and his partners warned engineers there would be ups and downs - nauseating ones. In more than a dozen flights in Nasa's "vomit comet" reduced-gravity aircraft, Made In Space scientists tested printer after printer.

Last week at their headquarters on Nasa's campus, Made In Space engineers in lab coats and hair nets tinkered with a sealed 3D printer in a dust free clean-room, preparing the models for further pre-launch tests.


As proof of its utility, the team revisited the notorious 1970 moon-bound Apollo 13 breakdown, when astronauts were forced to jerry-rig a lifesaving carbon dioxide filter holder with a plastic bag, a manual cover and duct tape. A 3D printer could have solved the problem in minutes.

"Safety has been one of our biggest concerns," said strategic officer Michael Chen. Sparks, breakages and electric surges can have grave consequences in the space station. "But when we get it right, we believe these are the only way to manifest living in space," he said.

Space-bound printers will also, eventually, need to capture gasses emitted from the extruded plastics, be able to print their own parts for self-repairs and have some abilities to recycle printed products into new ones.

Scott Crump, who helped develop 3D printing technology in 1988 by making a toy frog for his daughter with a glue gun in his kitchen, said he never conceived how pivotal it could be for space travel. But he said that until metal becomes commonly used in 3D printers, the applications will be limited.

"The good news is that you don't have to have this huge amount of inventory in space, but the bad news is now you need materials, in this case filament, and a lot of power," he said.

Nasa and other international space agencies are pressing forward with 3D printing. Mastering space manufacturing, along with finding and producing water and food on the moon or other planets, could lead to living on space.

- AP


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