Experiments in 3D Printing

Earlier this year I printed some 3D objects at Shapeways. 3D printing is a fairly new technology, with lots of methodologies and applications. In its simplest form, it’s just like regular inkjet printing, but instead of the print head laying down a drop of ink, it lays down a blob of plastic, and once the first layer is done, the print head starts printing plastic on top of the plastic. After several hundred layers, a 3D object is finished, and can be assembled into a UAV, or a rifle reciever, or a magazine.

Different printers can print different types of resin, plastic, ceramic, and even metal. Some printers have an ink nozzle right next to the media nozzle, so it can paint objects in full color while printing. Other dual-head printers can print a rigid plastic and soft rubber at the same time, or ABS and wax. This is useful for objects with a lot of non-touching moving parts, like gears. The gears and axles can be printed in hard plastic, supported by the printed wax until the object is done and the wax can be melted or crumbled out.

Objet Printed Gear Widget

There are even experiments in printing blood vessels and human organs, cell by cell, custom designed for transplant surgeries. As the printers get more sophisticated, they can do more things. Researchers are building machines than can print optics and electronic sensors directly into objects during printing. One of the great advantages of this system is that the cost is the same to print one object as it is to print a thousand. Mass production of injection molded plastic still might be cheaper in the long run, but there’s no setup cost to print a single custom product.

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The Global Election

As the American election cycle comes to a close, I’m looking forward to being able to have conversations about things not related to the White House. In fact, I might even get around to talking to folks about the other offices that we’ve elected people to today.

But in all seriousness, I’ve found it very interesting to follow the progress of the discussion, both here and abroad. The American presidential election is the largest, most popular, and most globally scrutinized political contest on earth, and watching world opinion can be very revealing.

When I lived in New Zealand I had just come from working in American media, and I was amazed at well international television reports from the BBC and Deutch Welle covered some things and how inaccurately they portrayed others. Being away from home provided perspective our own news, and made it easier to compare cultural ideas.

Even after moving back, I’ve tended to follow international coverage of our elections, and there were a lot of international opinions that arose on a recent Quora.com question: “If the current US presidential election candidates (Obama Vs. Romney) were running in your country who would you vote for and who do you think would win?


Of course, some statistics actually exist, and a recent Globescan poll of 21 countries resulted in a final tally of 50% voting for Obama, 9% for Romney, 31% various don’t knows and don’t cares, and an insightful 10% who didn’t believe that there was any difference between the two.

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