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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Wed, 3 Apr 2002 02:40:21 GMT
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Original-From:
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Steve Baker <sjbaker1@airmail%nospam%.net>
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Reply-To:
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SJBAKER1@stopspammersAIRMAIL.NET
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Viewed:
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1870 times
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Chris Daniel wrote:
> This exact same question was posted several months ago but I don't
> remember the sollution that they came to. This is my Idea:
>
> Ok you take two pulleys, pulley (A) is smaller then pulley (B).
> You then conect the 2 pulleys via a linkage so that when you turn pulley (A)
> pulley (B) continuosly changes directions.
>
> Now you take this two way motion and convert it back to one way and you
> have your desired effect.
Thanks - but that's not what I'm after. I want the input shaft to be rotating
continuously - and the output shaft to be stationary for some relatively
large amount of time - then suddenly rotate for a short time. This cycle
should be repeated. What your mechanism does is to make the output shaft
rotate all the time - but switching directions periodically.
Imagine what you'd get if you meshed two 40t gears - then filed off (say)
36 of the teeth from the 'input' gear. Then the input shaft could rotate
continuously - but the output shaft would only rotate for the 10% of the
revolution when the remaining teeth are meshed.
That's what I want - but I don't want to modify any Lego to do it.
The 'Geneva Escapement' is the right tool for the job - but building
one in unmodified Lego is going to be "interesting"!
----------------------------- Steve Baker -------------------------------
Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com>
URLs : http://www.sjbaker.org
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Message has 1 Reply:
 | | Re: Discontinuous motion.
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| "Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3CAA6B95.CB1986...ail.net... (...) (A) (...) you (...) rotating (...) You can do this without modifying any gears. To approximate a gear with teeth missing, all you need to do is have (...) (25 years ago, 3-Apr-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Discontinuous motion.
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| Bill, This exact same question was posted several months ago but I don't remember the sollution that they came to. This is my Idea: Ok you take two pulleys, pulley (A) is smaller then pulley (B). You then conect the 2 pulleys via a linkage so that (...) (25 years ago, 2-Apr-02, to lugnet.robotics)
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