3D printing has really come into is own in recent years, with the range of applications constantly increasing. However, not all 3D printers or printing methods are the same, ranging from ones that use layered melted plastic to ones that print layers of metal dust, then fuse them with microwave radiation. This range in difference also means that some printers are faster, more accurate, and more expensive than others.
Take the Pegasus Touch as an example. Built by a Las Vegas-based company Full Spectrum Laser (FSL), this desktop 3D printer uses lasers to create objects faster and in finer detail than most other printers in its price range. Available for as little as US$2,000 via a Kickstarter campaign, its performance is claimed to be comparable to machines costing 50 times more.
Instead of building up an object by melting plastic filaments and depositing the liquid like ink from a nozzle, the Pegasus touch uses what’s called laser-based stereolithography (SLA). This consists of using a series of 500 kHz ultraviolet lasers moving at 3,000 mm/sec to solidify curable photopolymer resin. As the object rises out of a vat of resin, the laser focuses on the surface, building up layer after layer with high precision.
To be fair, the technology has been around for many years. What is different with the Pegasus Touch is that FSL has shrunk the printer down and made it more economical. Normally, SLA machines are huge and cost in the order of hundreds of thousands of dollars. The Pegasus Touch, on other hand, measures just 28 x 36 x 57 cm (11 x 14 x 22.5 inches) and costs only a few thousand dollars.
This affordability is due in part to the wide availability of Bluray players has made UC laser diodes much more affordable. In addition, FSL is already adept at making laser cutting and engraving machines, which has allowed the company to base the Pegasus Touch on modelling software and electronics already developed for these machines. This allows the device to operate at tolerances equivalent to a $100,000 machine.
The device also has an on-board 1GHz Linux computer with 512 MB memory that can do much of the 3D processing computation itself, making a connected PC all but unnecessary. There’s also an internet-connected 4.3-in color touchscreen, which allows the user to access open-source models that are printer-ready, plus the machine comes with multi-touch-capable desktop software.
It also has a relatively large build area of approximately 18 x 18 x 23 cm (7 x 7 x 9 inch), which is one of the largest in the consumer 3D printer market. The company also says that the Pegasus Touch is 10 times faster than a filament deposition modelling (FDM) printer, has finer control, and up to six times faster than other SLA printers, and can produces a better and more detailed finish.
The Pegasus Touch’s Kickstarter campaign wrapped up earlier this month and raised a total of $819,535, putting them well above their original goal of $100,000. For those who pledged $2000 or more, the printer was made available for pre-order. When and if it goes on sale, the asking price will be $3,499. Given time, I imagine the technology will improve to use metal and other materials instead of resin.
And of course, there’s a promotional video, showcasing the device at work:
Sources: gizmag.com, kickstarter.com, fsl3d.com