Subject:
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some interesting lego building
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 11 Nov 1998 21:32:24 GMT
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Original-From:
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Greg Alt <galt@eskimo.&avoidspam&com>
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Viewed:
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2594 times
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After reading the robot builder's guide on:
http://fredm.www.media.mit.edu/people/fredm/projects/6270/
I had an idea... There's a really cool section about building strong
structures with lego technics pieces, and they list the different
possibilities for vertical braces that fit perfectly. The basic idea
is that a lego unit is 8 mm wide and 9.6 mm high. Using that, you can
solve for integer solutions for vertical braces.
So, I got to thinking... perfect diagonal braces should be possible.
All you do is solve for integer solutions to the following:
x = number of horizontal lego units
y = 3 * number of vertical lego units (because you can use 1/3 pieces)
r = number of horizontaal units for the diagonal brace
(8x)^2 + (9.6/3 * y)^2 = (8r)^2
x^2 + (4/25)y^2 = r^2
The reasonable length integer solutions are:
y x r
10 3 5
15 8 10
20 6 10
30 5 13
40 12 20
The y values need to be divided by 3 to get lego units.
(e.g. 3.33, 5, 6.66, 10, 13.33) Extra 1/3's just mean that you need
an extra 1/3 thick piece vertically.
Thought this might be of some interest, as I've found that it is very
easy to build something that gets ripped apart by a motor's torque or
a bump into a wall.
Greg
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Message has 2 Replies:
 | | Re: some interesting lego building
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| In message <199811112132.NAA272...kimo.com>, Greg Alt <galt@eskimo.com> writes (...) Not with the CyberMaster design models on the CDRom! They go out of their way to attach flat thin cross strips everywhere to make the robot almost indestructable. (...) (26 years ago, 11-Nov-98, to lugnet.robotics)
| | | Re: some interesting lego building
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| This kind of info is on LEGO ON MY MIND too: (URL) Triangles in menu There you'll see some explanatory pictures/animations as well. Eric Brok Greg Alt wrote in message <199811112132.NAA272...mo.com>... (...) (26 years ago, 12-Nov-98, to lugnet.robotics)
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