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Subject: 
Re: New technique: three position piston control
Newsgroups: 
lugnet.technic, lugnet.robotics
Date: 
Wed, 28 Sep 2005 02:20:30 GMT
Viewed: 
9732 times
  
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
> 
> > 
> > Does your centre stop cylinder stop accurately in the same place every time,
> > even under different pressure conditions?  I thought if you put a lot of source
> > pressure into the cylinder it might overshoot the mid-point, whereas with low
> > pressure it would creep up to it.  Accurate repeatable positioning is one of the
> > challenges of this scheme.
> > 
> > Mark
> 
> Kevin



Message has 1 Reply:
  Re: New technique: three position piston control
 
(...) 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 (...) (21 years ago, 28-Sep-05, to lugnet.technic, lugnet.robotics)

Message is in Reply To:
  Re: New technique: three position piston control
 
In lugnet.technic, Mark Bellis wrote: <snip> (...) Was this single or dual piston? (...) Kevin (21 years ago, 26-Sep-05, to lugnet.technic, lugnet.robotics)

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