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This is how do do pneumatic servo control

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  • This is how do do pneumatic servo control

    http://deltamotion.com/peter/Videos/PneuMove2.mp4

    If one can control pneumatics then controlling hydraulics is easy.





  • #2
    nice animation

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    • #3
      Very interesting. I wrote an article on pneumatic servo valves once:

      http://www.pneumatictips.com/4012/20...ency-response/

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      • #4
        Originally posted by testuser2 View Post
        nice animation
        ​That is not an animation. This is a recording. I used Apple's Remote Desktop ( RDC ) to echo the screen from the PC by the hydraulic system to my Mac Pro. On the Mac Pro I was using software called Screen Flow to capture the screen. I used a Logitech camera and software to capture the live video and put in on the screen that was then captured by Screen Flow. It was recorded in one take on-the-fly with no script.
        You can see the software I was using in the title bar of the windows.
        There is no editing.

        I/we really can control pneumatics that well. We really can compute accelerations using model based control. We practice with pneumatics from time to time because if we can control pneumatics then controlling hydraulics is easy and controlling motors is even easier..




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        • #5
          Originally posted by JoshCosford View Post
          Very interesting. I wrote an article on pneumatic servo valves once:

          http://www.pneumatictips.com/4012/20...ency-response/
          You should stop goofing off. There are many that won't understand the spoof.
          My video is real. By now you should know that the amount of research, math, physics and control theory we put into our product allows us to control pneumatics.
          I am serious. I don't like people screwing up one of my threads so that other can't separate fact from fiction.

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          • #6
            Originally posted by Peter Nachtwey View Post
            You should stop goofing off. There are many that won't understand the spoof.
            My video is real. By now you should know that the amount of research, math, physics and control theory we put into our product allows us to control pneumatics.
            I am serious. I don't like people screwing up one of my threads so that other can't separate fact from fiction.
            If you'll catch the date, you'll see it was an April Fool's article.

            Peter, I have no doubt as your genius when it comes to things like this. Do you have any video of the same application, but with variable load?

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            • #7
              Originally posted by JoshCosford View Post

              If you'll catch the date, you'll see it was an April Fool's article.

              Peter, I have no doubt as your genius when it comes to things like this. Do you have any video of the same application, but with variable load?
              No, It is hard to add or subtract weight on that demo . This is really a matter of just because you can doesn't mean you should. In an actual application it is better to use a small motor. A small electric motor is easier to setup and would probably cost less. I was just showing that we can and we apply what we learn to normal fluid hydraulic control.

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              • #8
                From a new member to this site - very interesting Peter

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                • #9
                  Just because you can doesn't mean you should. There are two very important parts to controlling pneumatics like this. One is the algorithms. The other is the cylinder. The cylinder should have a very low stick to slip friction ratio. I do things like this to test algorithms and to show what can be done but honestly, one should consider an electro-mechanical actuator for small applications and loads like this because chances are the stick to slip friction ratio will not stay constant in a pneumatic cylinder. This is not a cheap solution. The valve, pressure sensors and MDT feed back are not cheap.

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