Subject:
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Re: trying to guess the stud spacing by measuring bricks
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 25 Aug 1999 00:22:25 GMT
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Viewed:
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969 times
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Thanks Robert!
That did the trick. It had been awhile since I had read your earlier post
and I completely forgot about the standard gap.
Thanks,
Adam
Robert Munafo <munafo@gcctechNO.SPAMcom> wrote in message
news:FGzt2q.1op@lugnet.com...
> In lugnet.faq, Adam Howard writes:
> > [...] I used a caliper accurate to .001inches and measured the
> > > thickness of ten walls from various parts. The measurements ranged • between
> > > 0.062 and 0.058 inches or 1.5748mm to 1.4732mm.
> > [...]
> > After taking some more samples I have decided I need to take a lot more.
> > So far I've measured about 20 parts varying in size from a 2x2x1 to a • 1x6x1
> > as well as odd parts like a horse's hooves. What I have found is • contrary
> > to my original conversion and seems to support the 1mm=2.5LD units more,
> > but not quite. [...]
>
> The reason your approach doesn't work is because all LEGO parts are
> deliberately manufactured with a very tiny gap allowance on each
> contact-surface dimension. If this weren't the case, the bricks would not • fit
> well when dirty or marred. It might help you to re-read tha paragraph I • wrote
> about this issue:
>
> > It is also worthwhile to note that LEGO bricks are always made
> > a little smaller than this dimension would suggest. For example, the
> > length of a 2x4 brick is a little less than 4 times 7.986 millimeters.
> > The length is diminished slightly so that there will be a small gap when
> > bricks are stacked next to each other. This gap allows for dust, marred
> > surfaces and other imperfections. If the gap were not there the bricks
> > would tend to push each other apart and the overall construction would
> > be less strong.
>
> As a result, if you want to measure the stud spacing accurately, you can • only
> do so by constructing some type of large construction out of multiple
> overlapping bricks, such as a long horizontal wall. That is how I got my • value
> of 7.986 +- 0.002 millimeters.
>
> - Robert Munafo http://www.mrob.com/
> LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13
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Message is in Reply To:
 | | trying to guess the stud spacing by measuring bricks
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| (...) The reason your approach doesn't work is because all LEGO parts are deliberately manufactured with a very tiny gap allowance on each contact-surface dimension. If this weren't the case, the bricks would not fit well when dirty or marred. It (...) (27 years ago, 24-Aug-99, to lugnet.cad.dev)
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