When two parts need to be precisely aligned. It’s tough to beat a two pins. One goes into a hole (that fixes X + Y translation), and the other goes into a slot (that fixes rotation).
It works great, but it’s always seemed a little sloppy to me. Then I was turned on to diamond pins.
Carr-Lane [...]
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Earlier this week I made my way up VC Hill to attend MassMEDIC’s Envirofoum. The two presenters, Robert B. Pojasek of Capaccio Engineering and Kevin Johnson of Siemens did a fantastic job, but one of the topics perked my ears up a little more than the rest: the recent rise of UL Environment.
what is UL Environment?
First, [...]
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Courtesy of Adam O’Hern, the CAD Junkie.
Be sure to check out the rest of his amazing tutorials here
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I was going through my old bookmarks today and came across this short manifesto from Design Observer.
I’ve written before on the true attention cost of things, but rereading the manifesto got me thinking a little further:
Currently, we decide to bring things (be they artifacts or bits of information) by a simple ratio… utility/cost. Both metrics [...]
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The biggest hurdle to overcome with regards to using resin containing recycled content is something I like to call the performance bias.
Our performance bias tells us that in most cases, second hand materials aren’t going to perform as well as their brand new counterparts. It’s a bias that generally serves us well, but during the [...]
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When I first heard the term “side action”, I got what it was… but couldn’t quite envision how the tool worked.
I was told that:
A side action is something that allows you to create a feature with a pull direction that is at an angle to the primary pull direction.
In hindsight that seems clear, but nothing [...]
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This past weekend I was flipping through the March 2010 edition of Metropolis and came across an advertisement for a new line of San Fransisco bus shelter.
As eye candy, it was in line with the rest of the magazine, but read some of the copy and you see they are trying to sell it as [...]
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I should disclose something: Ever since I dropped $300+ on a Motorola V600, I have been a smartphone addict. V600, RAZR, Blackberry Pearl, currently the Tmobile G1, and I can’t help but eye The Droid Incredible.
Then, a few days ago I came across the Nokia C1-00. As I pored through it’s specs (6 week standby [...]
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In my last post on worst-case tolerance analysis I concluded with the fact that the worst-case method, although extremely safe, is also extremely expensive.
Allow me to elaborate, then offer a resolution in the form of statistical tolerance analysis.
cost
A worst-case tolerance analysis is great to make sure that your parts will always fit, but if you’re producing [...]
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I’ve heard some bad things about First Cut. Some complained about the poor tolerances, others that First Cut won’t tap holes, still others complaining about maximum part size.
They’re right, each one of them.
But if you’re willing to accept tolerances of ±0.005 (give or take) and tap your own holes, First Cut is a solid option.
They’re cheap, [...]
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