Subject:
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Re: Simulating pneumatic sequencers, was Re: Pneumatic Quadraped 242
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Wed, 26 Nov 2003 17:31:40 GMT
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Viewed:
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3057 times
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In lugnet.technic, Philippe Hurbain wrote:
> >
> > I also spent a lot of time this week writing up a page about pneumatic
> > sequencers (http://www.kclague.net/Sequencer). It is not done, because I don't
> > have all the movies finished, but I thought I'd put it up for those who might be
> > interested.
>
> Hi Kevin and all,
>
> I wanted to experiment with your sequencers without fussing too much with time
> consuming building, so I used simulation...
>
> I used a free electronics simulator, CircuitMaker Student
> (http://www.microcode.com/downloads/student.htm). Piston + switch are equivalent
> to an RS flip-flop, and you can add tubing (wires...), AND gates and SCOPE
> displays. A good tutorial and help file are provided with the program.
>
> Here are two screen captures of two simulated sequencers from your paper:
> http://www.brickshelf.com/gallery/Philo/Misc/2pistons.gif
> http://www.brickshelf.com/gallery/Philo/Misc/3pistons4switches.gif
>
> Caveats:
> - this does not simulate mechanical loading or speed variations between pistons
> (perhaps adding delay line can simulate that - not tested)
> - it's much more fun to build real sequencers ;o)
Philo,
Hey! Great stuff!
I've been aware of the electrical equivalence, but not mentioned it.
Maybe if you put capacitors in series at the inputs of each flop, your test
points might have less vertical slope.
I'll probably use the simulator to check out my paper designs.
In the end, my design process assumes all pistons and loads are exactly the
same (makes it easier to draw the graphs.)
I'm very impressed Philo!
Kevin
>
> Cheers,
>
> Philo
> www.philohome.com
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