Subject:
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Re: New technique: three position piston control
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Wed, 28 Sep 2005 23:47:45 GMT
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Viewed:
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4746 times
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In lugnet.technic, Mark Bellis wrote:
> In lugnet.technic, Kevin L. Clague wrote:
> > In lugnet.technic, Kevin L. Clague wrote:
> > > In lugnet.technic, Mark Bellis wrote:
> > >
> > > <snip>
> > > >
> > > > Interesting stuff! Should make walkers move more smoothly, with the possibility
> > > > of more groups of legs. The trick will then be reversing all the groups, since
> > > > it was easier with just two, using two polarity reversers.
> > > >
> > > > I have a centre-stop mechanism for pneumatic steering for a JCB. It's not part
> > > > of an automatic system though, since I don't yet have an application for that.
> > >
> > > Was this single or dual piston?
> >
> > Mark,
> > Did I miss your answer on this?
> > Kev
>
> No, I was so busy at work that I missed a couple of days online!
>
> I had a look at both, but a dual piston scheme works better for steering because
> of equalising the piston area and pushing at least 3 switches. In fact I have
> two cylinders in parallel at the moment. One problem I can foresee with that is
> that there is a net force towards the middle due to the auto-expansion effect,
> so the mechanism in the middle has to have good compressive strength.
<snip>
I used some axle joints to optimise cylinder position limiting in normal logic
> systems (without offset switches) in my Octopus arm. The base of one axle hole
> is on the end switch and the other end hits the top of the cylinder, limiting
> its contraction to the right amount. This reduces air usage on the logic board,
> speeding things up a bit.
Do you have a website where I can peruse your work?
>
> Mark
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20 Messages in This Thread: ![New technique: three position piston control -Kevin L. Clague (24-Sep-05 to lugnet.technic, lugnet.robotics, lugnet.announce.moc)](/news/x.gif) ![](/news/246.gif) ![Re: New technique: three position piston control -Mark Bellis (25-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/246.gif) ![Re: New technique: three position piston control -Kevin L. Clague (25-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: New technique: three position piston control -Sigurd van Strakenburg (2-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: New technique: three position piston control -Kevin L. Clague (2-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: New technique: three position piston control -Kevin L. Clague (26-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: New technique: three position piston control -Kevin L. Clague (28-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: New technique: three position piston control -Mark Bellis (28-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![You are here](/news/here.gif) ![](/news/246.gif) ![Re: New technique: three position piston control -Mark Bellis (30-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Mark Bellis (3-Oct-05 to lugnet.technic, lugnet.robotics, lugnet.announce.moc, lugnet.loc.uk)](/news/x.gif) ![](/news/246.gif) ![Re: New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Kevin L. Clague (3-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Kevin L. Clague (14-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Pictures of New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Mark Bellis (15-Oct-05 to lugnet.technic, lugnet.robotics, lugnet.loc.uk, lugnet.announce.moc)](/news/x.gif) ![](/news/46.gif) ![Re: Pictures of New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Kevin L. Clague (15-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: Pictures of New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Mark Bellis (15-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: Pictures of New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Kevin L. Clague (16-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif) ![](/news/46.gif) ![Re: Pictures of New technique: Cascaded Trinary Pneumatics (aka mid-stop) -Mark Bellis (17-Oct-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: New technique: three position piston control -Nathan Bell (26-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
![](/news/x.gif) ![](/news/68.gif) ![Re: New technique: three position piston control -Sigurd van Strakenburg (27-Sep-05 to lugnet.technic, lugnet.robotics)](/news/x.gif)
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