Subject:
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Re: Pneumatics and the RCX -how?
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 26 Oct 1999 21:12:23 GMT
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Original-From:
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Doug Carlson <dcarlson@net-info./antispam/com>
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Viewed:
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903 times
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At 04:20 PM 10/26/99 GMT, you wrote:
> In lugnet.robotics, lego-robotics@crynwr.com (Doug Carlson) writes:
> > I'd love to get a hold of some small RCX controllable valves also.
> > I just finnished building a six legged pneumatic walker that would
> > benefit from these for different walking motions.
> > Presently, it just walks forward with the tripod gate type motion.
> > It uses 20 of the small pneumatic cylinders (three per leg) with two inside
> > the body to
> > flip the air switches and has the Cybermaster rubber tipped thingies for
> > feet.
> > There are a few pictures and a short MPG movie at :
> >
> > http://www.net-info.com/~dcarlson/pnwalker.htm
> > (just a temporary location for now, I'll add this to my main page listed in
> > my sig soon)
>
> Very nice construction!!! Could you post some pictures of your hand-held
> controller too? (Whatever is on the off-screen end of the tether seen in the
> video clip.) Is that just a battery box, or is there more to it?
Thanks!
The only things off screen are the battery box and compressor.
If you look at the picture of the underside you can see the two switches and
cylinders that control the stepping motion.
http://www.net-info.com/~dcarlson/comp2.htm
is the LEGO compressor I use with it most of the time.
It needs more airflow than this can provide for continuous motion though.
>
> > I hooked it up to a different compressed air source (@ 30 psi) for the
> > movie so i could capture more gate cycles.
> > With a LEGO compressor and three air tanks it just takes a couple steps
> > (quickly) and then waits for the pressure
> > to build up again. It takes almost 30 psi to flip the switches when using
> > the small cylinders to actuate them. This is actually a benefit because it
> > enables the pneumatic cylinders driving the legs to move before the gate
> > switches flip to the next state.
> >
> >
> > Doug
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Message is in Reply To:
 | | Re: Pneumatics and the RCX -how?
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| I'd love to get a hold of some small RCX controllable valves also. I just finnished building a six legged pneumatic walker that would benefit from these for different walking motions. Presently, it just walks forward with the tripod gate type (...) (25 years ago, 21-Oct-99, to lugnet.robotics)
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