Blog Posts

quinta-feira, 13 de setembro de 2012

3D em Faiança, Metal fluído, Rostok, mais um Scanner 3D, e uyma Lambreta Eléctrica!

É como vos digo, uma nova técnica de impressão 3D em Cerâmica, vai recorrer à Faiança Egípcia, para reduzir o número de vezes que a cerâmica vai ao Forno, de 2 ou 3, para só uma!

Ancient Egyptian faience may be key to printing 3D ceramics

By David Szondy

We like to think of technology as always being forward looking. It’s supposed to be about nanoparticles and the Cloud, not steam engines and the telephone exchange. But every now and again the past reaches out, taps the 21st century on the shoulder and says, “Have a look at this.” That’s what happened to Professor Stephen Hoskins, Director of the University of West England, Bristol's Centre for Fine Print Research. He is currently working on a way of printing 3D ceramics that are self-glazing, thanks to a 7,000-year old technology from ancient Egypt.
Working under a grant from the Arts and Humanities Research Council (AHRC), Hoskins and Research Fellow David Huson have been developing a 3D ceramic printing process that can build very finely detailed, complex structures to industrial specifications and standards. The process works by depositing a layer of wet ceramic material layer by layer. As each layer is printed, the printer table drops, a layer of powder is deposited to support the object, and the process repeats. 

Os Metais, quando deslizam um pelo outro, portam-se como Flúidos!
Essa, é nova!

Sliding metals show fluid-like behaviour

Researchers at Purdue University took high speed video of metal sliding over each other and discovered a strange swirling fluid-like behaviour not normally associated with solids.
This research might have major implications for the gun industry. Guns are essentially a collection of sliding metal parts. If this fluid behaviour can be reduced in the barrel, maybe the barrel life can be significantly extended.
The reader who emailed us about this research pointed out that this may be one of the pricinples behind the Blish Lock phenomenon that was exploited in the Thompson Autorifle and the original Thompson SMG. John Bell Blish discovered that "certain dissimilar metals will resist movement with a force greater than normal friction laws would predict" from observing naval gun breeches which unlocked when firing weak charges but not heavy charges.

A fenomenal Impressora 3D Rostok espera o vosso apoio, no Indiegogo:

Rostock MAX 3D Printer

Make your ideas real! Print Plastic parts from your computer model.

The Rostock MAX Delta 3D Printer by SeeMeCNC

We're in the final stage of development/testing and tooling up for production! This Indiegogo campaign is just what we need to boost us into full production of these amazingly cool 3D printers. Our open-source 3D printer design is based on Johann's origional Rostock delta printer prototype.

How many people do you know with a 3D printer? How many do you know with a DELTA 3D printer? We want to make you the first person in your makerspace/hackerspace/group to own and operate something so unique and different. With the laser cut acrylic or wood framework, standard aluminum extrusion (available everywhere) and high-strength injection molded plastic parts, it's much easier to build and assemble than any other 3D pritner before it.

We're bringing the popularity of Laser Cut parts to our new Rostock MAX machiens as well as many other additions to the origional design. Our Lasercut Acrylic version (Like what's in the pictures and videos) just looks cool! But, if you're looking for a better value, we are also going to be using a melamine lasercutting board. It cuts really clean, and its super strong and rigid. For $100 less, it's a noteworthy option!

Cá vai mais uma maneira de fazerem Scans 3D, desta vez, dos vossos quartos:

Kinect 3D scans with Skanect

Cross-platform Kinect scanning

I’m a huge fan of the Microsoft Kinect, especially when using it to make 3D scans. It’s just a great bit hardware that gets repurposed again and again in interesting ways. Naturally, when I saw this new 3D scanning software the other day, I had to give it a whirl.
Skanect is a Kinect 3D scanning tool that works in Windows and OS X. In its current state, it appears to be best-suited for scanning a room, rather than a person or single object.
Newer (but currently unreleased) versions appear to make some decent people scans – like the one at the top of this post. That came from the official blog, which shows a series of gradually improving 3D models.

...E vai de Lambreta, esta é Eléctrica, e todo-o-terreno, e tratem de fazer uma destas em casa, para o que der e vier...!

All-Terrain Electric Scooter


At the beginning of the 2011/2012 school year, my school's robotics team decided to finally dismantle some old FRC robots that had been collecting dust for six or seven years. We had no use for all the parts we stripped off the robots, so I generously relieved the team of some of these parts, including six Victor 884's, six CIM motors (4x 2.5", 2x 3"), 2 AndyMark Toughbox gearboxes, some #35 roller chain, and assortment of sprockets, some steel shafts and shaft collars, a 1/4" by 4" by 3' aluminum plate, 1" aluminum U channel, 1/8" polycarbonate sheet.... Anyways, while looking up the CIM motor curves, and trying to figure out by how much I could over-volt them, I ran into this, which at one point used a pair of CIM motors. That vehicle then led me to these. By an interesting coincidence, only a few weeks after I discovered those vehicles, I went to the Atlanta Mini Maker Faire, and guess what I saw there. After seeing the vehicles in action, I decided to build my own electric vehicle, and so the idea for my scooter was born.

The scooter is geared for a top speed of about 25 mph, has around 3 horsepower, and can go 8-12 miles per charge.

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