Even with a good statement of work, I asked the manufacturing staff for "as built" drawings to try to catch things like this. Wouldn't have had an effect on the magnet glue problem, though.
I agree with the use of good instructions or standard operating procedures. However, I don't like the idea of standard operating procedures being, "bring it to me and I'll fix it with some baling wire and twine."
I liked the article as well. Kind of makes one wonder if the tolerance stack was done to understand if the process was capable of producing repeatable parts with the process being used.
And in this case it sounds like someone forgot to check and see if the glue would give the product the life it needed. Could have been one of those cost out ideas. Or more than likely, someone just thought it would work as good as the other stuff.
This story exemplifies the importance of good work instructions. A good system will account for a new employee and still make quality product. Documentation of task steps and quality risks on each step is important.
Scott, that is a good point. This reminds me of a number of situations I have seen with small manufacturers over the past few years. The problem was parts testing over time (life testing). You really need to trust your supplier or have a good warranty program. On the other hand, even with a good warranty the failure often leaves a bad taste with the consumer.
I spent a lot of years as a club musician and speakers were tossed around quite a bit, not like Pete Townsend, but things get dropped, bounced around on the stage, and in vans. I've heard voice coils rub, seen them melt, and shatter (titanium horns). I've seen surround dry rot and fatigue, but I've never seen a magnet fall off, not even on the big 20lb magnet JBLs. This sounds like a pretty low quality vendor.
I really enjoyed this story since it addresses the real world issues of manufacturing. It's fine to design something on a CAD program, but somewhere along the line, the actual parts have to be assembled and that, it turns out, is every bit as important and the design itself. Attention to detail, proper assembly techniques, training and clear work instructions all matter. Thanks.
For 3D printing to make the jump from rapid prototyping to manufacturing, engineers will need to find easier ways to move products from their CAD screens to their printers.
Gigabit and PoE are two networking technologies moving ahead in tandem as industrial users power remote Ethernet devices such as IP security cameras at 1,000 Mbps over existing CAT5 cable.
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 5
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I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.
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