Subject:
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Re: pneumatics & mindstorms?
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 28 Jul 1999 01:06:51 GMT
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Viewed:
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2064 times
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In lugnet.robotics, lego-robotics@crynwr.com (Michael Aaron Finch) writes:
> FINALLY!
>
> some one has described a use for pneumatics! I keep debating on
> whetjer to buy some, because i don't know what to do w/them.
>
> Dennis Clark wrote:
>
> > In lugnet.robotics, Soh Chio Siong writes:
> > [snip]
> > > Don't give up on pneumatics just yet.
> > [snip]
> >
> > Indeed don't! There is no better way to get great power and speed at
> > the same time then the pneumatics. With a worm gear you can get great
> > power, but not much speed, with the gears you can get great speed, but
> > not much power. With the big cylinder you can get both. Just like in
> > the real world, pneumatics (hydrolics) require a lot more support stuff
> > to keep them working.
Another nice thing about pneumatics is that you can put the heavy compressor
anywhere you want, and just run a couple of hoses off to the actual piston.
This is useful at the business end of a robot arm, for example, where you want
a powerful yet lightweight actuator.
I had another idea that I haven't had the time (or parts) to try out. I've
noticed that the rubber hoses can be gently pinched to cut off the air flow.
Has anyone tried using a set of cams to control "switching" of a network of air
hoses from one or more motors? The control axle would be turned to a
particular angle to open some hoses and close others before the master on/off
switch is opened to apply pressure and move the pistons. I can easily imagine
a variety of different pinch mechanisms built out of Lego.
There's no need to limit yourself to only using motors to control this, either.
Some pneumatic models could have mechanical levers to select different
functions manually instead of under RCX control.
Is anyone out there doing anything like this, or am I just full of hot air?
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Message is in Reply To:
 | | Re: pneumatics & mindstorms?
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| FINALLY! some one has described a use for pneumatics! I keep debating on whetjer to buy some, because i don't know what to do w/them. My father is an engineer, but i remodel houses. I just like legos still as an adult. Thanks, & keep up the good (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
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