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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.08 11:14:00 -
[1]
 Originally by: bsspewer
The giant light fixture above the dentist's or surgeons head that they can move to any position.
I'd think you're on the right track with this one. At the dentist's, next room over from the one with the big light, is a similar arm with a camera already attached. It's the X-Ray machine. (Actually technically the camera's not on the arm. It's in your mouth. The flashbulb is on the arm.)
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.08 23:23:00 -
[2]
If you would generally be taking pictures straight down, and I assume it would be good if they're always taken from the same "altitude," mightn't a trolley system be better? Something like the gizmo that flies above NFL games these days.
For your case I'd build something sturdier. Assume, just for discussion, that your space is 16 x 20. Along the 20 side, just below the ceiling, I'd mount 2 inch Al square tube pointy side up, one on each side. A trolley would ride each tube. On the trolleys would be an assemblage of two 2 inch Al square tubing, 16 long, riding square to the 20s. Your camera would hang down between the two 16s, on a trolley of its own. A ratcheting assembly could be devised if repeatability is desired.
The time of an excellent welder and an excellent sheet-metal man plus materials would certainly be less than the cost of a commercial device. Where are you? I may be able to make this work if you're interested.
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.08 23:40:00 -
[3]
Originally by: Derovius Vaden
If they are going to a simple trolley system, they might as well install an industrial ceiling hoist to move around their lab equipment as well; killing two birds with one stone so to speak.
Yeah but I don't install those so he'd be killing my bird too 
Seriously though, if I'm thinking of the same thing you're thinking of, they need to already have the steel in place to support it. Standard systems come built for standard steel sizes. If he's got Is he's cool, but if it's warehouse truss beams, I haven't seen a system for that yet. Doesn't mean I won't build one if the price is right, though.
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.08 23:53:00 -
[4]
Originally by: Derovius Vaden
a complete from-the-ground-up installation, where one can put the proper support members in place to take the loads.
Your words put my nipples online. Can you gang more contractors, battleship-pew-pew?
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.09 00:47:00 -
[5]
The thing with an arm is --
If I understand correctly what you're trying to do, the exact information about where the picture was taken from is almost as important as the picture itself. With dead reckoning, a trolley system has two variables. An arm system has three variables per articulation. If you need real submillimeter accuracy you'll install some spiffy laser surveying system independent of the mount, rendering the arm v trolley argument moot. If millimeter accuracy is sufficient, I still think you'd be better served by a sturdy trolley/rail system.
At this point I'm just playing devil's advocate for fun. You give me more info, and I'll come up with more stuff.
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.09 01:06:00 -
[6]
Originally by: bsspewer
there's no measurements involved. So xyz mm adjustments are not measured. I only need to put the camera in place and snap a photo. I can't use a tripod because the tripod would have to rest ON or over the evidence (because your taking a photo straight down), and almost every time that's not feasible.
See now once you say that you blow all my arguments right out of the water. Arm FTW. You're saying you just need something to help hold most of the weight of the camera so you can take a steady picture. Did you say that? Sometimes I get lost in the excitement of creation and forget about the original specs. How many high slots did you say are available?
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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Sister Impotentata
Caldari
State War Academy
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Posted - 2007.11.09 01:30:00 -
[7]
Originally by: Derovius Vaden
This is starting to get a little dirty, something tells me I'm about to be asked for a CC number and expiry date. 
I don't have an expiry date, I just have to show that my book is always up-to-date. Getting the big red B, however, satisfying zoning, flood plain, eco impact, health, and three kinds of structural; sub, grade, and up... that's where it costs you money. 
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TANSTAAFL
Originally by: Hostess
Deconstructing the Twinkie is like trying to deconstruct the universe.
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