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(...) Looks like we did it again. I read this post, (URL) wanted to come up with a working pressure regulator. I came up with, you guessed it, a single switch piston and rubber bands. I snapped some photos, which will appear on Brickshelf soon, and (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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(...) I think that we can make a simple pressure regulator using a piston, a single switch, and rubber bands. The piston is mechanically linked to the switch. Rubber bands compress the piston. When the piston is most contracted, the switch is off. (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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In lugnet.technic, Billy Bauman wrote: <snip> (...) Hi Billy, As CSSoh points out, there are a few simple diagrams here on page 5 and 6 that might help clarify hydraulics for you. One thing we're missing is pressure regulation. (URL) (19 years ago, 23-Nov-05, to lugnet.technic)
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| | Re: What the? Hydraulics
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Vineet, if I have been following the threads properly- the breakthrough that may allow the use of hydraulics with Lego penumatic components is the set up which takes out the implicit forth port so you dont get squirting oil from your creations. It (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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| | Re: System to allow pressure and vacuum for piston at the same time
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(...) Thank you. (...) Well we must agree that the switch solution is a bit gangly. I'd like to work on a more compact solution before I bother with the engine. When simply run on compressed air, the sequencer cycled faster than I would have (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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(...) Hydraulics and pneumatics are similar. Pneumatics uses air, which is a gas and can be compressed. Air pressure difference is what makes pneumatics work. Hydraulics uses fluids which compresses a little, but not much compared to gasses. Both (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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| | Re: System to allow pressure and vacuum for piston at the same time
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(...) <snip> (...) <snip> (...) <snip> (...) <snip> (...) Wow! Great stuff! But why hypothetical? Would have loved to see the running engine and how it compares with the traditional ones using just compressed air, which was the original question. (...) (19 years ago, 22-Nov-05, to lugnet.technic)
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| | What the? Hydraulics
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Kevin Clague- How can a lego pneumatic do hydraulic work? If I'm not much mistaken, hydraulics and pneumatics use two diferent sources of power. (19 years ago, 22-Nov-05, to lugnet.technic)
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(...) Yes, I was wondering what method should be used to bleed them successfully. The clamp idea is a good one. My compressor is very basic. I don't have buggy motors. To build the pressure/vac engine all you would have to do, I assume, is split the (...) (19 years ago, 22-Nov-05, to lugnet.technic)
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(...) You will undoubtedly have to bleed the air out of the system when you put in your hydraulic fluid. Otherwise the system won't perform as well. (...) Kev (19 years ago, 22-Nov-05, to lugnet.technic)
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(...) Hi Billy, Well, my recollection of a composite five port switch was faulty. When I tried to create a two piston timing circuit (precursor to motor), it would leak because all four switches would be on, letting pressure directly through to (...) (19 years ago, 22-Nov-05, to lugnet.technic)
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Hi, Single LEGO pneumatic switches are not capable of controlling a pneumatic system that uses both pressure and vacuum to drive a given cylinder at the same time. A single switch does not let you capture the exhaust inherint when a piston contracts (...) (19 years ago, 22-Nov-05, to lugnet.technic, lugnet.robotics, lugnet.announce.moc) !
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| | Re: NQJ - wanna trade? -Followup
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(...) Calum, The great thing about NQJ aka Brick It Forward is that there is no ending time set. Just to keep you in the loop, I was in deep discussion with several people yesterday who were offering me fantastic sets. I am not at liberty to name (...) (19 years ago, 22-Nov-05, to lugnet.market.jambalaya, lugnet.market.buy-sell-trade, lugnet.general, lugnet.technic, lugnet.org.ca.rtltoronto)
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| | Re: Random Pneumatic idea/question
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(...) Having now made a hydraulic pump, I figured it was time to go to the next step and make a compressor. (URL) This is the first working model. Again, the tank represents the load. I decided to use the pump motor as the switch mechanism for my (...) (19 years ago, 22-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) I don't understand this statement. (...) In this compressor/engine schematic I drew yesterday, vaccume is the exhaust for pressure, and pressure is the exhaust for vaccume inside the engine. The part of the compressor that creates vaccume (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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(...) To be honest, I never actually intended it to be used in an engine. And to be more truthful, I just buitl my first pneumatic engine a couple of days ago, so my knowledge on the subject is a bit, archaic. I wanted to create a closed circuit (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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I think most certainly a combined fluidics would be in order first. Im surprised there was not already a .pneumatics, as it would seem like an obvious group. Not that I have contributed, but I do follow the pneumatics thread with great interest. I (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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(...) Nice work. With the exhaust sealed off, I figure the piston will move up and down gradually and gracefully rather than the quick movement that we're used too, because of the cushioning effect. This would be fine for an application like a (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) No - exhaust! (...) You need to eventually discharge the compressed air (or vacuum) in a pneumatic system. Interestingly enough, this is the first time I heard of a pneumatic system using compressed air and vacuum at the same time. Usually (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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(...) Here we go. I finally got some pictures of my progress. (URL) The tank represents the load on the circuit. (URL) And this is with the ram for the load. I am very pleased to find that it works. (URL) Its interesting to me too. Rather odd that (...) (19 years ago, 21-Nov-05, to lugnet.technic)
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