Subject:
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Re: Mechanical pneumatic piston
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 9 Oct 2003 11:58:42 GMT
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Viewed:
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1533 times
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At 02:40 PM 10/8/2003, you wrote:
> In lugnet.robotics, Philippe Hurbain wrote:
> > >
> > > You probably mean Leo's translational joint:
> > >
> > > http://carol.wins.uva.nl/~leo/lego/piston.html
> > >
> > > HTH
> > > Mario
Ah, that's it exactly! Thanks a lot.
> > A version I built a long time ago from Leo's idea, using a standard motor:
> > http://www.philohome.com/radarcar/gearcmd.htm
> >
> > Philo
Very interesting. Fairly small, and I imagine it moves pretty quick.
Actually, in the application I want it for, it will be cranked by hand, so
a motor isn't needed at all.
> I once built one of these, just to see how it worked. It's pretty ingenious. I
> kept adding worm gears to see how big I could make it. Once you add more than
> two, there's a big gap in between the gears and the end of the housing you
> build
> for it. That means the worm gears can slide up and down the axle slightly and
> separate the thread, which will either jam the mechanism or cause it to skip
> over and over. I think you can fill that gap with one of the really thin old
> bevel gears, but I never tried it.
Hmm...I wonder why that is? You would think that the worms would be of the
same geometry forms. Well, I'll just try it and see. Your worms didn't
happen to be worn down, did they?
Thanks for the help, fellows!
~Mike
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Message has 1 Reply:
 | | Re: Mechanical pneumatic piston
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| In lugnet.robotics, Mike Thorn wrote: [snip] (...) Nope. Worm gears are not an integral number of studs long. They are about 1/4 of a stud short. Not enough for a small pulley (1/2 bushing). (...) Kevin (21 years ago, 9-Oct-03, to lugnet.robotics)
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Message is in Reply To:
| | Re: Mechanical pneumatic piston
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| (...) I once built one of these, just to see how it worked. It's pretty ingenious. I kept adding worm gears to see how big I could make it. Once you add more than two, there's a big gap in between the gears and the end of the housing you build for (...) (21 years ago, 8-Oct-03, to lugnet.robotics)
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