Subject:
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Re: Pneumatic pump and switch version 2
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 28 Nov 2001 18:01:09 GMT
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Viewed:
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682 times
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That is a really nice way to drive the pneumatics
system from a motor! Excellent!! It opens the door
to RCX controlled pneumatic "effectors" rather neatly.
You can hide the motor and pump assembly in the "guts"
of the beast while placing the cylinder where the
action is required - without the weight penalty of
using the motor itself at the end of arms or other
appendages.
I see no reason why multiple pump/switch combinations
of this type shouldn't share a common blue tank.
Your comments about not running the thing continuously
are well taken - waste of electrical (battery?) power
and needless wear and tear on the pump and gears.
So does this mean an RCX compatible pressure sensor might
become more than just a one of a kind curiosity? Should
I set to work?
JB
In lugnet.announce, Edmund Nussbaum writes:
> Hi there,
> here is the 2nd version of a pneumatic pump and
> switch using a single motor. Whenever the motor
> runs, the pump produces pressure. Depending on the
> direction the motor turns, the valve will switch
> into the one or the other direction.
>
> http://home.t-online.de/home/sibylle.eddy/pneswit2.html
>
> If you like it, just give me a note.
>
> Edmund Nussbaum
> mailto:en@mpifr-bonn.mpg.de
> http://home.t-online.de/home/sibylle.eddy/lego.html
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Message has 3 Replies:
 | | Re: Pneumatic pump and switch version 2
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| (...) It's easy to make an all LEGO shut off switch. Use a Polarity switch and a small cylinder. Use elastic bands to hold it to offset the air pressure. When the pressure is enough to push the piston up it toggles the switch and cuts the power. (...) (23 years ago, 28-Nov-01, to lugnet.robotics)
| | | Re: Pneumatic pump and switch version 2
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| This is a nice compact implementation of the system I used in Quad_I ( (URL) ), except I was using the large pumps. However, there's another, reasonably nifty way, that builds onto the back of the Hempel double-acting small-pump design. Some photos (...) (23 years ago, 29-Nov-01, to lugnet.robotics)
| | | Re: Pneumatic pump and switch version 2
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| (...) To have a pressure sensor would be very nice. You could have multiple of the pumps & switches (using a single air tank). Depending on the pressure the RCX can control the time that is needed to recover pressure. And whenever you need some (...) (23 years ago, 3-Dec-01, to lugnet.robotics)
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Message is in Reply To:
| | Pneumatic pump and switch version 2
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| Hi there, here is the 2nd version of a pneumatic pump and switch using a single motor. Whenever the motor runs, the pump produces pressure. Depending on the direction the motor turns, the valve will switch into the one or the other direction. (URL) (...) (23 years ago, 28-Nov-01, to lugnet.announce) !
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