Subject:
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Re: Discontinuous motion.
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 5 Apr 2002 06:54:22 GMT
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Viewed:
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494 times
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Steve,
I don't know if this will help you at all, but I certainly had fun with it.
I put together a (quite bulky) version of the Geneva Wheel.
http://home.insight.rr.com/worldof/lego/gen_whl_esc/index.html
Joe
"Steve Baker" wrote in message news:3CAB63F5.7A5CF2B6@airmail.net...
<snip>
> I guess I should explain why I wanted this thing in the first place.
>
> All the talk last week about building a Turing machine using Lego - and
> building primitive mechanical computers in general led me to try to build
> a simple adding machine using gears and stuff. (I'm aware of the awesome
> pneumatic adder someone presented recently).
>
> So, the first step was to build a counter - like a car odometer - where • you
> spin one axle and when it's spun a complete revolution, a second wheel • moves
> 1/10th of a revolution. When the second wheel has undergone a complete
> revolution, a third wheel moves forward a tenth of a revolution. This
> gives you the 1's, 10's and 100's numbers based on how much the wheels
> have moved. It didn't need to be a base 10 system though.
>
> The first step of that was to get a reliable mechanism that would allow
> one revolution of the input axle to rotate the second wheel by 1/10th of
> a revolution. A 10:1 gear ratio would do that - but car odometers don't
> do that. The 10's digit stays absolutely still until the 1's wheel is
> just about to clock over from '9' back to '0' - and then it moves quite
> quickly onto the next 10's digit.
I don't know how you could get a 10:1 (not for lack of trying to figure it
out)... but you could do a 16:1 or an 8:1 (maybe)
Have fun 8-)
<snip>
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Discontinuous motion.
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| (...) OH! I see! Very clever. I guess I should explain why I wanted this thing in the first place. All the talk last week about building a Turing machine using Lego - and building primitive mechanical computers in general led me to try to build a (...) (22 years ago, 3-Apr-02, to lugnet.robotics)
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