RepRap is short for replicating rapid-prototyper; it employs a technique called ‘additive fabrication’. The machine works a bit like a printer, but, rather than squirting ink onto paper, it puts down thin layers of molten plastic which solidify. These layers are built up to make useful 3D objects.
RepRap has, so far, been capable of making everyday plastic goods such as door handles, sandals and coat hooks. Now, the machine has also succeeded in copying all its own 3D-printed parts.
These parts have been printed and assembled by RepRap team member, Vik Olliver, in Auckland, New Zealand, into a new RepRap machine that can replicate the same set of parts for yet another RepRap machine and so on ad infinitum. While 3D printers have been available commercially for about 25 years, RepRap is the first that can essentially print itself.
The RepRap research and development project was conceived, and is directed, by Dr Adrian Bowyer, a senior lecturer in engineering in the Faculty of Engineering & Design at the University of Bath, UK.
Dr Bowyer said that: “These days, most people in the developed world run a professional-quality print works, photographic lab and CD-pressing plant in their own house, all courtesy of their home PC. Why shouldn't they also run their own desktop factory capable of making many of the things they presently buy in shops, too?
“The possibilities are endless. Now, people can make exactly what they want. If the design of an existing object does not quite suit their needs, they can easily redesign it on their PC and print that out, instead of making do with a mass-produced second-best design from the shops. They can also print out extra RepRap printers to give to their friends. Then those friends can make what they want too.”
Recently, Chris DiBona, Open Source Programs Manager at Google Inc, encouraged people to: "Think of RepRap as a China on your desktop."
Sir James Dyson, Chief Executive of the Dyson Group, said: “RepRap is a different, revolutionary way of approaching invention. It could allow people to change the ergonomics of a design to their own specific needs.”
Dr Bowyer hopes people will come to the Cheltenham Science Festival and see both the 'parent' and the 'child' RepRap machines in action for the first time together.
"RepRap is the most enjoyable research project I've ever run," he said. "Without the many talented and selfless volunteers the RepRap project has all round the world, it would have never succeeded so quickly."
Complete plans for the prototype RepRap 3D printer and detailed tutorials to aid motivated amateurs (and professionals) in assembling one are available, free-of-charge, at the RepRap website (details below). The materials, plus the minority of parts that the machine cannot print, cost about £300. All those non-printed parts can be bought at hardware shops or from online stores.
Dr Bowyer and several of the other Reprap team members will be available to answer questions and exhibit the parent and child RepRap printers in operation at the Cheltenham Science Festival from 4-8 June 2008.
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