turkeydance writes: Using a combination of 3D printing and widely available components, David Wirth built a functioning handheld railgun that houses six capacitors and delivers more than 1,800 joules of energy per shot. So far he has tested the gun using metal rods made of graphite, aluminum and copper-coated tungsten. David has shot projectiles at over 250 meters per second in tests.

New submitter byrddtrader writes: My parents are getting close to the their 70s and neither one of them is particularly tech savvy. Since my teenage years I have been tech support for the family, but now that I am older I can not be at their beck and call every time they inadvertently download something they should not, or the printer stops working. Given the amount of time that I have worked with them I don't feel that it is realistic that I will be able to convey the information they need to become self-sufficient. What I am looking for is a service that will be able to assist with any software PC related issues, viruses, printers and the like. Currently they are using a tech firm out of India (iYogi) that does unlimited support for a few hundred per year per machine -- which is fine, though they are big on the up-sell. They tend to push their own virus protection software, and attempted to sell my Dad, who has 500Mb of documents, a 3Tb external hard drive because they said he needed it. Currently the computers they use are ones I have built. Maybe the best solution would be store-bought PCs that offer additional tech support at a price. Any thoughts would be appreciated.

MikeChino writes: Your next house could snap together like a jigsaw puzzle without the use of any power tools. Clemson University students designed and built Indigo Pine, a carbon-neutral house that exists largely as a set of digital files that can be e-mailed to a wood shop anywhere in the world, CNC cut, and then assembled on-site in a matter of days. “Indigo Pine has global application,” says the Clemson team. “Because the house exists largely as a set of digital files, the plans can be sent anywhere in the world, constructed using local materials, adapted to the site, and influenced by local culture.”

gthuang88 writes: Given the hype around 3D printing, you'd never guess that established leaders like 3D Systems and Stratasys have seen their stock fall by 75 percent in the last year. Big companies like HP, Amazon, and Boeing are getting into the field, too, but startups are still where a lot of the action is. Now Formlabs, a Boston-area startup, has released a new 3D printer that is supposed to be more reliable and higher quality than its predecessors. The device uses stereolithography and is aimed at professional designers and engineers. The question is whether Formlabs---and other startups like MarkForged, Voxel8, and Desktop Metal---can find enough of a market to survive until 3D printing becomes a more mainstream form of manufacturing.

An anonymous reader writes: A Spanish cancer patient diagnosed with chest wall sarcoma has received the world's first 3D printed titanium sternum and rib cage. Anatomics, an Australian medical device company, designed and manufactured the metal rib cage. Cnet reports: "Once printed, finished and polished, the implant was couriered to the Salamanca University Hospital, where it was implanted into the patient's chest. It has now been two weeks since the surgery, and the patient has been discharged is recovering well."

sandbagger writes: Printer ink is expensive, so it's important that when a printer tells you a cartridge is running dry, the cartridge is actually running dry. Unfortunately, that's not always the case. The folks over at Bellevue Fine Art in Seattle recently decided to find out exactly how much ink their high-end Epson 9900 printer wastes. A professional grade 700ml cartridge will have 120-150ml remaining when "empty," and a 350ml cartidge will have 60-80ml remaining when "empty." For this studio, the difference amounts to hundreds of dollars worth of ink every month.

mikejuk writes: In a recent interview with very lucky 14-year old Sarina Khemchandani for her website, ReachAStudent, Steve Wozniak was more than precise about the role of Steve Jobs. "Steve Jobs played no role at all in any of my designs of the Apple I and Apple II computer and printer interfaces and serial interfaces and floppy disks and stuff that I made to enhance the computers. He did not know technology. He'd never designed anything as a hardware engineer, and he didn't know software. He wanted to be important, and the important people are always the business people. So that's what he wanted to do. The Apple II computer, by the way, was the only successful product Apple had for its first 10 years, and it was all done, for my own reasons for myself, before Steve Jobs even knew it existed." He also says a lot of interesting things in the three ten minute videos about life, electronics and education.

An anonymous reader writes: New software out of MIT and the Interdisciplinary Center Herzliya in Israel takes CAD files and automatically builds visual models that users can alter with simple, visual sliders. It works by computing myriad design variations before a user asks for them. When the CAD file is loaded, the software runs through a host of size variations on various properties of the object, evaluating whether the changes would work in a 3D printer, and doing the necessary math to plan tool routes. When a user moves one of the sliders, it switches the design along these pre-computer values. "The system automatically weeds out all the parameter values that lead to unprintable or unstable designs, so the sliders are restricted to valid designs. Moving one of the sliders — changing the height of the shoe's heel, say, or the width of the mug's base — sweeps through visual depictions of the associated geometries."

There are two big drawbacks: first, it requires a lot of up-front processing power to compute the variations on an object. Second, resolution for changes is fixed if you want quick results — changing the design for a pair of 3D-printed shoes from size 8 to size 9 might be instantaneous, but asking for a shoe that's a quarter of a millimeter longer than a size 8 would take several minutes to process. But for scrolling through the pre-computed design changes, the software can present "in real time what would take hours to calculate with a CAD program," and without the requisite experience with CAD.

A food printer that can print cookies and pizzas will go on sale next year for $1,800.

Zothecula writes: Developed by Yale engineer Adam Spiers, the Animotus is a wirelessly-connected, 3D printed cube that changes shape to help direct you like a haptic compass. Gizmag reports: " Spiers designed Animotus when he was involved in a performance of Flatland, an interactive play based on Edwin A. Abbott's 1884 story of a two-dimensional world. As part of the stage production, audience members – both sighted and visually impaired – were kept in complete darkness and walked four at a time though the performance space with narrative voice overs and sound effects telling the story as they wandered through. In their hands, each participant held an Animotus that guided them by changing shape to point them in the right direction. With a multi-sectioned body created in a 3D printer, that Animotus alters shape in response to wireless instructions to indicate the user’s position in their environment. To do this, the top half of the cube twists around to point users toward their next destination and then slides forward to give a relative indication of the distance to get there. As a result, rather than having to look at a device, such as the screen of a smartphone, the user was able to determine their path by touch."

Lucas123 writes: Researchers at MIT have been able to build a printer with uses 10 different photosensitive polymers to create a myriad of objects, and they were able to build it using off-the-shelf commodity parts for around $7,000. The MultiFab 3D printer works by mixing together microscopic droplets of photopolymers that are then extruded through inkjet printheads similar to those in office printers. A UV light then hardens the polymers layer by layer. Perhaps even more remarkable than the list of materials it can use is the MultiFab 3D printer's ability to self-calibrate and self-correct during a print job (PDF). The printer has an integrated machine vision system that automatically readjusts the printer head if errors occur, rectifying the build before a problem ruins the object; that means print jobs that run into errors don't need to be cancelled and materials wasted. The researchers said they can foresee an array of applications for the MultiFab 3D in consumer electronics, microsensing, medical imaging and telecommunications, among other things.

Last week you had a chance to ask Dr. Tarek Loubani about his 3D-printable, 30-cent stethoscope project, and other open source, ultra-low cost medical equipment. Below you'll find his answers to your questions.

An anonymous reader writes: MIT's Mediated Matter Group has published a paper and a video about their new technique for 3D printing with glass. The top part of their printer is a kiln that heats the glass to temperatures of approximately 1900 degrees Fahrenheit, causing it to melt. The molten glass is then passed through an alumina-zircon-silica nozzle, which moves just like an extruder on normal 3D printers. "The frame of the printer is constructed out of 80/20 aluminum stock and square steel tube. They used three independent stepper motors and a lead screw gantry system and drivers which were controlled via an Arduino and a RAMPS 1.4 Arduino shield." The device's makers say, "The tunability enabled by geometrical and optical variation driven by form, transparency and color variation can drive; limit or control light transmission, reflection and refraction, and therefore carries significant implications for all things glass."

sandbagger writes: The latest attempt to create artificial scarcity comes from Xerox, according to the editors at TechDirt, who cite German sources: "Xerox uses region coding on their toner cartridges AND locks the printer to the first type used. So if you use a North America cartridge you can't use the cheaper Eastern Europe cartridges. The printer's display doesn't show this, nor does the hotline know about it. When c't reached out to Xerox, the marketing drone claimed, this was done to serve the customer better..."

An anonymous reader writes: Inkjet printer cartridges have been the bane of many small businesses and home offices for decades. It's interesting, then, that Epson is trying something new: next month, they're launching a new line of printers that come with small tanks of ink, instead of cartridges. The tanks will be refilled using bottles of ink. They're reversing the economics, here: the printer itself will be more expensive, but the refills will be much cheaper. Early reports claim you'll be spending a tenth as much on ink as you were before, but we'll see how that shakes out. The Bloomberg article makes a good point: it's never been easier to not print things. The printer industry needs to innovate if it wants us to keep churning out printed documents, and this may be the first big step.

ErnieKey writes: Fred, a Red-Footed Tortoise in Santos, São Paulo, Brazil, was unfortunately caught up in a recent forest fire that deteriorated the majority of his shell. He needed a new shell in order to survive, so veterinarians in Santos teamed up with a dentist and a graphical designer to create a new 3D printed shell for Fred that was ultimately surgically placed on the tortoise. From the 3dPrint story: "Fred unfortunately came down with a terrible case of pneumonia post-surgery, which prevented him from eating for about a month and a half, but in the end survived and is now doing very well with his new 3D printed shell. The shell, which was printed with the same PLA material that is found on most desktop 3D printers, has been holding up very well, although researchers are not exactly sure how long it will hold up for or if Fred will be able to be released into the wild."

schwit1 writes: It may seem like your computer or smartphone is possessed by an evil spirit sometimes when a mysterious bug keeps causing an app to crash, but if you truly think your machine has been invaded by an evil spirit, there's someone who will take your call — Reverend Joey Talley. A Wiccan witch from the San Francisco Bay Area, Talley claims to solve supernatural issues for techies. Business Insider reports: "Talley’s website says she welcomes issues too unusual or dangerous to take the the straight world of Western helpers. But she also says no problem is too big or small, even, perhaps, your printer malfunctioning. However before you jump on the phone, you should be aware that Talley’s services do not come cheap. She charges $200 an hour (though a phone consultation is free)."

New submitter MoarSauce123 writes: Over time I accumulated a number of empty toner cartridges for a Brother laser printer. Initially, I wanted to take a local office supply chain store up on their offer to give me store credit for the returned cartridge. For that credit to be issued I would have to sign up for their store card providing a bunch of personal information. The credit is so lousy that after the deduction from the sales price of a new toner cartridge the price is still much higher than from a large online retailer. And the credit only applies to one new cartridge, so I cannot keep collecting the credit and then get a cartridge 'for free' at some point.

I also looked into a local store of a toner refill chain. Their prices are a bit better, but the closest store is about half an hour away with rather odd business hours. Still, at the end they charge more than the large online retailer asks for a brand new cartridge. For now I bring the empty cartridges to the big office supply store and tell them that I do not want their dumb store credit. I rather have big corp make some bucks on me than throw these things in the trash and have it go to a landfill. Are there any better options? Anything from donating it to charity to refilling myself is of interest.

An anonymous reader writes: I've been thinking about getting a 3-D printer for a while: the quality is rising, the software is better, STL files really do seem a sufficiently good standard ("sufficiently standard," that is — I'm not worried that printers are going to stop supporting it anytime soon), and prices have dropped quite a bit. Importantly to me, it also seems like less of a jumping-off-a-cliff decision, since I can get a completely assembled one from places as wild and crazy as ... the Home Depot (not that I plan to). However, even the stretchiest practical things I can think of to print can't truly actually justify the price, and that's OK — I hope not to require enough replacement knobs and chess pieces to necessarily *need* one, and playing around with it is the main likely upshot, which I'm OK with. But still, I'd like to hear what uses you have been putting your 3-D printer to, including printers that aren't yours but belong to a hackerspace, public library, eccentric neighbor, etc. What actually practical / useful tasks have you been using 3-D printing for, and with what printer technology? What playful purposes? It's OK if you just keep printing out those chess pieces and teapots, but I'm curious about less obvious reasons to have one around. (And I might just use the local Tech Shop's anyhow, but the question still applies.) If you've purchased a 3D printer, are you happy with the experience? If so, or if not, what kind did you get?

GordonShure.com writes: San Francisco based biotech startup Pembient have released details of their 3D printing led method to derail the market for Rhinoceros horns. Presently the bulk of demand originates from China, where said horns — gathered in the wild by poachers who usually kill the rhinos — are revered for supposed medicinal qualities. The new firm intends to mix keratin with Rhino DNA, then machine the combination with a 3D printer in a way that their counterfeit horns are difficult to detect by customers and traffickers alike.

The company already mulls expanding its production principle to other, lucrative wild animal trades such as the claws of tigers and lions. Pembient is however a young company — for all their ingenuity, will their ambitions to take on such a colossal black market be realized?