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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Mon, 13 Oct 2003 23:00:15 GMT
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Viewed:
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1367 times
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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. :(
Thanks for the suggestions, fellows! They are immensely appreciated!!
~Mike
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Message has 2 Replies:
 | | Re: Stability of cars/rails?
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| (...) 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 (...) (21 years ago, 14-Oct-03, to lugnet.trains)
| | | Re: Stability of cars/rails?
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| (...) Then, if the LEGO track radius is sufficient, my idea still would work, just put the arm on the outside, and definately use a wheel this time. Nothing visible within the track circle! (21 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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| (...) 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 (...) (21 years ago, 13-Oct-03, to lugnet.trains)
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