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In lugnet.lego, Thomas Main wrote:
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In lugnet.lego, Jake McKee wrote:
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I’ve had a number of people ask me about a perceived quality issue lately:
If you take a number of plates and create two or more large stacks, they
tend to be differing heights. For example, Ben has posted some photos here:
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=793687
I mentioned that this is a “perceived” quality issue because on the surface
it seems to be an obvious quality issue, but in reality, there is nothing
out of place. I have checked with our Quality Assurance department for some
details and they have passed along some info.
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Well, perception is everything. It is a quality issue for people who build
with Lego; it is not a quality issue for the Lego Company’s Quality Assurance
department.
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When you build, the height difference will often be aligned as the elements
typically will vary in element height from one end to another. In order to
get the maximum deviation all the plates have to turn the same way and they
have to be from the same tool. This is not likely.
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I perceive this as a problem for a company making parts that supposedly form
a compatible system with one another. But it’s ok, that’s just my perception
and in reality nothing is out of place.
snip
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The tolerances used today are the same as years past.
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In the past, I have heard that the tolerance for bricks is .02mm (From Henry
Wiencek’s The World of LEGO Toys and other sources).
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That’s nothing. My
“Ultimate Lego Book” (Foreword by KKK himself) tells me that in 1963 ABS
allowed moulding precision to 0.005 mm (0.0002 inches).
Scott A
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It’s good to get
clarification of this mistake. I do hope that TLC will stop bragging about
their part tolerances in publications in the future, though.
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Hope this helps clear this up. Please know (and remember) that LEGO has
always been, and will always be about quality. We have a great team in the
Quality group, manufacturing, and Design that works hard to ensure the best
parts are being created.
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I think TLC has high quality standards considering the intended purpose of
the toy. I think it falls short of our standard of quality expectation. But
ultimately, I believe this is just one more limitation we have to work with
in using Lego as a building medium. And, I think it’s important to
understand the limitations of Lego.
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Message has 1 Reply:
 | | Re: Quality issue - update
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| (...) I've got yet another doc (not sure of the source-- was emailed to me as an Offical 'standard Lego FAQ' sorta thing) that reports: "The precision molds are made at two LEGO factories in Germany and Switzerland. They are precise to (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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Message is in Reply To:
| | Re: Quality issue - update
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| (...) Well, perception is everything. It is a quality issue for people who build with Lego; it is not a quality issue for the Lego Company's Quality Assurance department. (...) I perceive this as a problem for a company making parts that supposedly (...) (20 years ago, 30-Jun-04, to lugnet.lego, lugnet.color, lugnet.general, FTX)
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