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"Rob Stehlik" <robbby31@hotmail.com> wrote in message
news:HA4C8t.DCq@lugnet.com...
> If you have a lot of these hinge plates then you can build a hexagon with
> perfect geometry.
That is probably the best way - but I have to define the shape somehow,
otherwise it's just a floppy frame.
> The nice thing about a hexagon is that the distance between two opposite
> points is an exact number. This makes it easy to attach the hexagon to a
> turntable:
http://www.ecf.utoronto.ca/~stehlik/images/robots/hexagone/competition1.jpg
> The other spokes attached to the turntable were the result of trial and
> error. They seemed to fit nicely though.
I thought the hardest part would be attaching the hexagonal frame to the
turntable (which is exactly what I need to do)! I will have to play around
with it, but maybe if I build a hexagon with 4x1 beams and hinge plates,
that when it streatches open it will stradle the uprights on the turntable.
That would be an ideal case, anyway. Knowing my luck the math won't work
out, though. I can't quite see how you did it on Hexagone!
Now my big problem is that the cylinder for lifting and lowering the crown
needs to have the wire pass through the hole in the turntable also.
This is really hard.
Iain
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Message is in Reply To:
 | | Re: Hmm
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| (...) Iain, unfortunately Hexagone had some imperfect geometry in it. I ended up using the studless single angle beams at the corners. They are not exactly 120 degrees (my protractor says about 125) so I had to force them into that shape a bit. The (...) (22 years ago, 11-Feb-03, to lugnet.org.ca.rtltoronto)
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