Printed Perforated Lampshades for Continuous Projective Images

From Haisen Zhao, Lin Lu, Yuan Wei, Dani Lischinski, Andrei Sharf, Daniel Cohen-Or, Baoquan Chen: We present a technique for designing 3D-printed perforated lampshades, which project continuous grayscale images onto the surrounding walls. Given the geometry of the lampshade and a target grayscale image, our method computes a distribution of tiny holes over the shell, such that the combined footprints of the light emanating through the holes form the target image on a nearby diffuse surface. Our objective is to approximate the continuous tones and the spatial detail of the target image, to the extent possible within the constraints of the fabrication process.  To ensure structural integrity, there are lower bounds on the thickness of the shell, the radii of the holes, and the minimal distances between adjacent holes. Thus, the holes are realized as thin tubes distributed over the lampshade surface. The amount of light passing through a single tube may be controlled by the tube's radius and by its direction (tilt angle). The core of our technique thus consists of determining a suitable configuration of the tubes: their distribution across the relevant portion of the lampshade, as well as the parameters (radius, tilt angle) of each tube. This is achieved by computing a capacity-constrained Voronoi tessellation over a suitably defined density function, and embedding a tube inside the maximal inscribed circle of each tessellation cell. The density function for a particular target image is derived from a series of simulated images, each corresponding to a different uniform density tube pattern on the lampshade... (full paper)

FIRST 3D TOOLS PRINTED ABOARD SPACE STATION

Evan Gough for UniverseToday:  Astronauts aboard the International Space Station have manufactured their first tool using the 3D printer on board the station. This is another step in the ongoing process of testing and using additive manufacturing in space. The ability to build tools and replacement parts at the station is something NASA has been pursuing keenly. The first tool printed was a simple wrench. This may not sound like ground-breaking stuff, unless you’ve ever been in the middle of a project only to find you’re missing a simple tool. A missing tool can stop any project in its tracks, and change everybody’s plans. The benefits of manufacturing needed items in space are obvious. Up until now, every single item needed on the ISS had to be sent up via re-supply ship. That’s not a quick turnaround. Now, if a tool is lost or destroyed during normal use, a replacement can be quickly manufactured on-site.   Cont'd...

How Big Area Additive Manufacturing is Enabling Automotive Microfactories

Ian Wright for Engineering.com:  Make no mistake, 3D printing is changing manufacturing. Although it may take years before we see the full impact of bringing this technology from rapid prototyping to full-scale production, there are already hints of big things to come. Take Local Motors’ recent purchase of two Big Area Additive Manufacturing (BAAM) systems from Cincinnati Incorporated (CI) as an example. The former company designs, builds and sells custom vehicles out of its US-based microfactories. The latter is a century-old manufacturer of metal fabrication tools and, more recently, BAAM.   Cont'd...

Computational Hydrographic Printing

From Yizhong Zhang, Chunji Yin, Changxi Zheng, Kun Zhou's paper:   Hydrographic printing is a well-known technique in industry for transferring color inks on a thin film to the surface of a manufactured 3D object. It enables high-quality coloring of object surfaces and works with a wide range of materials, but suffers from the inability to accurately register color texture to complex surface geometries. Thus, it is hardly usable by ordinary users with customized shapes and textures. We present computational hydrographic printing, a new method that inherits the versatility of traditional hydrographic printing, while also enabling precise alignment of surface textures to possibly complex 3D surfaces. In particular, we propose the first computational model for simulating hydrographic printing process. This simulation enables us to compute a color image to feed into our hydrographic system for precise texture registration. We then build a physical hydrographic system upon off-the-shelf hardware, integrating virtual simulation, object calibration and controlled immersion. To overcome the difficulty of handling complex surfaces, we further extend our method to enable multiple immersions, each with a different object orientation, so the combined colors of individual immersions form a desired texture on the object surface. We validate the accuracy of our computational model through physical experiments, and demonstrate the efficacy and robustness of our system using a variety of objects with complex surface textures...  (full paper)

3D printing of patterned membranes opens door to rapid advances in membrane technology

Penn State Materials Research Institute via Science Daily:  A new type of 3D printing developed by researchers at Penn State will make it possible for the first time to rapidly prototype and test polymer membranes that are patterned for improved performance. Ion exchange membranes are used in many types of energy applications, such as fuel cells and certain batteries, as well as in water purification, desalination, removal of heavy metals and food processing. Most ion exchange membranes are thin, flat sheets similar to the plastic wrap in your kitchen drawer. However, recent work has shown that by creating 3D patterns on top of the 2D membrane surface, interesting hydrodynamic properties emerge that can improve ion transport or mitigate fouling, a serious problem in many membrane applications. Currently, making these patterned membranes, also called profiled membranes, involves a laborious process of etching a silicon mold with the desired pattern, pouring in the polymer and waiting until it hardens. The process is both time-consuming and expensive, and results in a single pattern type. “We thought if we could use 3D printing to fabricate our custom-synthesized ion exchange membranes, we could make any sort of pattern and we could make it quickly,” says Michael Hickner, associate professor of materials science and engineering at Penn State.   Cont'd...

New dual-step method provides 3D printing of conductive metals.

Shalini Saxena for ArsTechnica:  Customizable, wearable electronics open the door to things like heart-monitoring t-shirts and health-tracking bracelets. But placing the needed wiring in a complex 3D architecture has been hard to do cheaply. Existing approaches are limited by material requirements and, in the case of 3D writing, slow printing speeds. Recently, a research team at Harvard University developed a new method to rapidly 3D print free-standing, highly conductive, ductile metallic wires. The new method combines 3D printing with focused infrared lasers that quickly anneal the printed nanoparticles into the desired architecture. The result is a wire with an electrical conductivity that approaches that of bulk silver.   Cont'd...

RAPID 2016 - HP begins selling its Jet Fusion 3D printer; says it's 50% cheaper, 10X faster than others

Lucas Mearian for ComputerWorld:  Hewlett-Packard today began taking orders for its first 3D printer, the HP Jet Fusion printer, which it said will be up to 10 times faster than existing machines and can cut the cost of manufacturing parts in half. At the RAPID 3D additive manufacturing conference here, HP revealed two models:  the lower-cost and lower production 3200 series and the 4200 series, for which it is now taking orders. The 4200 series will begin shipping to manufacturers in October; the 3200 series will be available in mid-2017. HP originally unveiled its Jet Fusion printer in October 2014. HP claims its printer will enable mass production of parts through additive manufacturing (3D printing), instead of just rapid prototyping, for which the technology  is typically used. The printers are unlikely to be used to produce millions or billions of production parts; think, instead, in terms of hundreds, thousands or tens of thousands of parts, HP said.   Cont'd...

The MakerBot Obituary

From Brian Benchoff at Hackaday:   MakerBot is not dead, but it is connected to life support waiting for a merciful soul to pull the plug.  This week, MakerBot announced it would lay off its entire manufacturing force, outsourcing the manufacturing of all MakerBot printers to China. A few weeks ago, Stratasys, MakerBot’s parent company, released their 2015 financial reports, noting MakerBot sales revenues have fallen precipitously. The MakerBot brand is now worth far less than the $400 Million Stratasys spent to acquire it. MakerBot is a dead company walking, and it is very doubtful MakerBot will ever be held in the same regard as the heady days of 2010. How did this happen? The most common explanation of MakerBot’s fall from grace is that Stratasys gutted the engineering and goodwill of the company after acquiring it. While it is true MakerBot saw its biggest problems after the acquisition from Stratasys, the problems started much earlier... (full article) (fist hand account from Isaac Anderson)

Disney files patent for near instantaneous 3D printing

Lucas Mearian for ComputerWorld:  Disney Research has filed a patent for a 3D printing technology that uses high-intensity light to harden photo-sensitive resin in a single process, removing the need for layer-by-layer printing. The patent describes a machine for printing in "a nearly instantaneous manner." "Presently, 3D printing is extremely slow and time consuming. For example, it may take several hours to print a single 3D object even if the 3D object is relatively small (e.g., several inches in diameter and four to 12 inches tall)," Disney stated in its patent filing. "The 3D printing process that uses conventional 3D printers ... is limited in its speed by the speed of the mechanism moving the print head to each new position on a print layer."   Cont'd...

A Swarm Of 3D Printing Spiders Could Build Your Next Home

IDO LECHNER for PSFK:  Watching an object being 3D-printed is a spectacle to behold; the speed at which intricate geometries unfold before your eyes is enough for anyone to reckon that this is the future of manufacturing. While both consumer-grade models and more advanced versions are capable of whipping up objects made from different materials, each with their own aesthetic and subsequent properties, the scale of what can be fabricated is entirely based on the size of the printer at use. For this reason, a research team based out of Siemens’ Corporate Technology’s Princeton campus has developed mobile 3D printers in the shape of spiders, which are both autonomous and capable of working in sync to expedite the printing process. PSFK spoke with Siemens’ Director of R&D of Engineering Livio Dalloro on why the team decided to shape their printers like spiders, the implications such a technique might have on the industry, and how Siemens sees the device unfolding in the foreseeable future.   Cont'd...

Bring 3D printed robots to life with 'Ziro' hand-controlled robotics kit

Benedict for 3Ders.org:   Tech startup ZeroUI, based in San Jose, California, has launched an Indiegogo campaign for Ziro, the “world’s first hand-controlled robotics kit”. The modular kit has been designed to bring 3D printed creations to life, and has already surpassed its $30,000 campaign goal. It would be fair to say that the phenomenon of gesture recognition, throughout the wide variety of consumer electronics to which it has been introduced, has been a mixed success. The huge popularity of the Nintendo Wii showed that—for the right product—users were happy to use their hands and bodies as controllers, but for every Wii, there are a million useless webcam or smartphone functions, lying dormant, unused, and destined for the technology recycle bin.   Full Article:  

The Questions Executives Should Ask About 3D Printing

Channing Flynn for Harvard Business Review:  Most hearing aids in the U.S. are now custom-made on 3D printers. The U.S. Food and Drug Administration recently approved the first 3D-printed pills. Carmakers have started using 3D technology to produce parts. And last year saw the first demonstration of a digital printer producing multilayer, standards-based circuit boards. Imagine the changes afoot in the pharmaceutical, medical device, automotive, and consumer electronics industries. 3D printing is poised to redefine global manufacturing and distribution. It could upend supply chains, business models, customer relationships, and even entrepreneurship itself. It may do to physical goods what cloud computing is now doing to digital services; what the PC, internet, and smart mobility have done to personal computing; and what outsourcing did to software development and business processing — take mass distribution and innovation to the next level while realigning the very geography of work and trade.   Cont'd...

How Microfactories Can Bring Iterative Manufacturing to the Masses

ANDREW O'KEEFE and JASON DORRIER for Singularity Hub:  Humans manufacture a mind-numbing amount of stuff each year—ever wonder how we do it? In the past 100 or more years, it’s been all about economies of scale. This means you should make a lot of a thing because the more you make, the more your fixed expenses get spread out. This reduces the cost of each unit, from light bulbs to iPhones. Here’s the problem. It’s expensive to do a big manufacturing run. So, how do you know what to make in the first place? Often, it’s an educated guess based on prototypes and limited feedback, but you don’t really know until you try to sell a product—and by then, you’re fully committed, succeed or fail. Jay Rogers of Local Motors wants to upend common wisdom. Manufacturers should run through tons ofpotentially good ideas and then test them out to see if people actually want what they’re making before going full scale. And Rogers thinks microfactories are the way to do it.   Cont'd...

This 3D printer can rival standard manufacturing on the factory floor

Lucas Mearian for ComputerWorld:  Start-up Carbon began shipping its industrial-grade 3D printer with the expectation that big-name companies will soon be using it to replace traditional forms of manufacturing. Last year, the Silicon Valley company emerged from quiet mode to announce its technology: a machine that can create objects 25 to 100 times faster than other 3D printers. Carbon is not selling its M1 3D printer outright, but instead is offering it through a subscription price of $40,000 per year, which includes a service and maintenance plan. The three-year-old company based in Redwood City, Calif. said its Continuous Liquid Interface Production (CLIP) printing process can create objects in minutes compared to the hours a typical 3D printer requires.   Cont'd...

With this new 3D printing technique, robots can "practically walk right out of the printer"

Katherine Noyes for Digital Arts:  Imagine you could use a standard 3D printer to create your next robotic assistant. Just snap in a motor and battery, and it's ready to go. That's precisely the scenario made possible by a new 3D printing technique developed at MIT. Liquids have long been a challenge for 3D printing, and they're necessary for hydraulic devices like moving robots. On Wednesday, researchers at MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) announced what they call the first-ever technique for 3D printing robots that can print solid and liquid materials at the same time.   Cont'd...

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