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In lugnet.animation, Kevin L. Clague wrote:
> In lugnet.animation, Mike Thorn wrote:
> > At 02:44 PM 10/7/2003, you wrote:
> > > In lugnet.animation, Mike Thorn wrote:
> > > > At 07:12 AM 10/7/2003, you wrote:
>
> [snip]
>
> > >
> > > Your original system had the pistons underneath the platform, right?
> >
> > No, if you look at the photos you'll see that each piston is joined above
> > the platform. It's not the best system because of the lower power you
> > achieve with retraction versus extension, but it works best when you're
> > trying to keep everything above ground.
>
> My bad.
>
> >
> > > You must be assuming that the ganged pistons would be underneath. This is
> > > not a requirement.
> >
> > No, I'm assuming they're above. The platform must be above ground level no
> > matter where the pistons are if only one side of the platform is
> > articulated, unless you have an area below ground underneath the platform
> > clear. The ideal platform would be able to tilt up, down and would reside
> > at ground level. As far as I can tell, this is impossibly pneumatically
> > with only one side articulated. Unfortunately.
> >
> > > I'm not advocating for ganged pistons.
> >
> > Perhaps not, but I really liked your control piston system and would like
> > to use it if possible. I'm just not sure it is even possible and still
> > maintain the flexibility of the platform.
> >
> > > I'd think that a geared mechanism (possibly motorized) would be best.
> >
> > I'm wondering about that, but I'm also wondering if it's possible with only
> > two motors instead of four. I have two of each variety (yeah, I don't
> > have the largest collection on earth) and trying to pair them would be
> > tricky at best.
>
> I would think that you can easily do it with one motor for the front, one motor
> for the back (greatest flexibility.
>
> You'll have to use the other variety motor to rotate the turntable.
>
> >
> > I'm thinking about a rack system, basically replacing pistons with a set of
> > rack gears and a big gearbox. Control would be finer, provided I drive it
> > with the RCX. I may be able to more easily incorporate it with one of
> > Beat's turntables as well. Hmm. "Some Thought Required For Assembly."
>
> Fun, eh?
>
> [snip]
>
> > It perhaps wouldn't help this application but would be fun nonetheless.
> > I'll have to think about that. I'm still thinking about the motorized side
> > of the project as well. (brain overload...)
> >
> > Time to do some building!
>
> The best part...
>
> >
> > ~Mike
>
> Kevin
Hey guys,
I have been following this post since it started. It inspired me to try to find
a use for my vision command cam.
I decided not to try to use pnuematics...but rather a simple gear/belt drive
system. It gives full pan and tilt...well at least one full turn before the
wires decide to bind on the inside.
At the moment it is driven by switches and 9v batt boxes...But the plugs can
easily be hooked to an rcx. (which I will do when time allows).
I have uploaded a few pictures to brickshelf...but they seem to be taking a
while to become public. But once available, there will be pics of the control
switches and the simple gear drive for the tilt unit.(the "pan" side of things
is buried deep in the unit)
One of the uploads worked..
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=536665
Either way...it's fun to listen to all the ideas. Plus kind of neat to have a
couple of switches down by the keyboard controlling my new lego pan-tilt web
cam.
~Jim
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Message has 1 Reply:
 | | Re: Pneumatic/Motorized Camera Tilt Unit
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| In lugnet.animation, Jim Kovacs wrote: [snip] (...) Hi Jim, Very cool! Maybe I'll have to dig out my vision cam too,,,, It was fun dreaming up designs, and it was fun talking with Bauchaille, an old friend (and one of the senior statesman on the (...) (21 years ago, 9-Oct-03, to lugnet.animation, lugnet.build, lugnet.technic)
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