January 2nd, 2010, 11:16 PM | #1 |
Regular Crew
Join Date: Dec 2009
Location: Kansas
Posts: 54
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1 line or 2 line Cable Camera
I am wanting to build a cable camera and just curious of the pro's and con's of different types of configurations.
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January 3rd, 2010, 02:32 AM | #2 |
Inner Circle
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Er, .....Matt.............
You wouldn't like to flesh this out a bit, just to give us poor amateurs a bit to work with now, would you?
Simple things like how heavy a rig, how long a run, what motors you're running - you know, all that boring stuff that tells simple folks like us what you're trying to achieve here. It's the New Year, and most folks Crystal Balls are plain out of batteries, go on, give us a break! CS |
January 3rd, 2010, 01:39 PM | #3 |
Regular Crew
Join Date: Dec 2009
Location: Kansas
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Sorry
I plan on using aircraft cable either 1/8" or 3/16" with a 500' span. For the trolley that rides across the cable i plan on propelling it from an anchor point with a cable that works like a belt drive from the two anchor points. I don't want it to weigh more than 50 pounds with camera and head on it.
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January 3rd, 2010, 04:05 PM | #4 |
Inner Circle
Join Date: Feb 2004
Location: switzerland
Posts: 2,133
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woaw, 500' with a 1/8 or even 3/16 cable it is very ambitious.
i am not even sure it is possible. either the cable is used relaxed, then it is bending in the middle, or you can get it stretched to keep it straight as much as possible. in the last case, force exerced on the cable will be huge (for a 500' cable) if you keep it relaxed, on such distance, any smallest wind will shake everything. and anyway remote control motorized sled would be better, you will be able to master speed a much better way. |
January 3rd, 2010, 04:31 PM | #5 |
Inner Circle
Join Date: Feb 2004
Location: switzerland
Posts: 2,133
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you can get an idea of cable behavior here
Find reactions for cable and if you need some data for the cable Aircraft Cable Galvanized & Stainless Steel, Nylon & Vinyl Coated Cable, Cablelaid, & Strand | WorldWide Enterprises, Inc. |
January 4th, 2010, 09:11 PM | #6 |
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Join Date: Dec 2009
Location: Kansas
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single strand?
i would use a single strand but don't know how they propel them like garret browns flycam?
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January 5th, 2010, 06:29 PM | #7 |
Inner Circle
Join Date: Feb 2004
Location: switzerland
Posts: 2,133
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it is darn easy and cheap to make a simple DC motor (about $30) with small reduction and a cheap bi-directional PWM controller (about $25).
just add a li-ion battery (14.4V) and a cheap RC remote control. you pinch the cable between 2 plastic wheel (slightly off axis of cable path) and that's all. |
January 5th, 2010, 06:40 PM | #8 |
Inner Circle
Join Date: Feb 2004
Location: switzerland
Posts: 2,133
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forgot to put some links
Bidirectional DC Motor Speed Controller Electronic Kit http://www.jameco.com/webapp/wcs/sto...SEARCH%252BNAV I received today the PWM controller, takes 30 min to solder components, wired one of the motor above. Perfect match. With 2 sets you can even make a pan/tilt head. with a cheap 3 channel remote control and 3 servos attached to the potentiometer, you can have total control, wireless. but if the camera is small, you just need 2 powerful jumbo servos (about $40 each, less expensive than a motor/controller set) to directly drive the pan/tilt. |
January 6th, 2010, 10:16 PM | #9 |
Regular Crew
Join Date: Dec 2009
Location: Kansas
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Are there any websites with pictures and information on different systems?
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