Subject:
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Re: Stability of cars/rails?
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 14 Oct 2003 00:34:55 GMT
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Viewed:
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3604 times
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In lugnet.trains, Mike Thorn wrote:
> At 05:06 PM 10/13/2003, you wrote:
> > In lugnet.trains, Jan-Albert van Ree wrote:
> > > Mike Thorn wrote:
> > > So you want to mount a camera on a flatbed and put it on a circle?
> > > If so you might want to make an arm that goes into the center, and put some
> > > weight on it and a single wheel or even one of those boat "glider pads"
> > > round 2*2 under it (as in 6541 and 6542), that should keep it even more
> > > steady, although it would require a nice flat surface, but that would
> > > already be the case for the track anyway.
> >
> > wow, that's getting complicated.
> >
> > how about a 12v motor, at the center, with a platform built onto it. you get
> > stability (by removing the bogey aspect), and simplicity.
> >
> > if need be, i can post a mockup, but somehow i don't see this as a problem
> > requiring realism, just simplicity.
>
> Both ideas would work excellently for an external 360-degree pan, but once
> again I forgot to mention one thing: the subject is in the middle.
>
> To clarify: I'm doing a film where I have a cardboard "valley" full of
> sand. I want to do a pan all the way around the valley, with 408 frames for
> 21 seconds at 20fps. Even at that high framerate (for stopmotion that's
> pretty high; standard is 15fps) any wobbles are pretty apparent.
>
> I calculated the maximum circle possible with the LEGO rails and it came
> out to be about 25 inches. My valley is about three feet in diameter, so
> that's not going to work too well.
>
> I think I may have semi-solved the problem if I'm very very careful: I used
> some clear tape to make crosshairs on my camera LCD viewer. As long as I
> keep the crosshairs centered on one thing, I should be able to keep it
> fairly wobble-free. I do wish the LEGO tracks were large enough to be able
> to use, that would be so nice. :(
Here's a thought: Make a single "rail" out of 1x2 bricks, curved to the
diameter you want. Build a wheeled support for your camera with a groove in it
that lets you slide it along the bricks.
Or (and I know this is blasphemous and all) buy some 'lay your own' regular
model railroad track from a hobby store.
James
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Message has 1 Reply:
 | | Re: Stability of cars/rails?
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| (...) Good suggestion. I'm not sure I have the baseplates to keep it all together, but I'll think about it. I was given a large table in the basement to work this project on, so I have good room now. A brick ring is certainly feasible, if I have (...) (23 years ago, 14-Oct-03, to lugnet.trains)
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Message is in Reply To:
| | Re: Stability of cars/rails?
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| (...) Both ideas would work excellently for an external 360-degree pan, but once again I forgot to mention one thing: the subject is in the middle. To clarify: I'm doing a film where I have a cardboard "valley" full of sand. I want to do a pan all (...) (23 years ago, 13-Oct-03, to lugnet.trains)
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