DIY Jib / Crane by Cosme, LRC Productions

Ok, thats a fantastic idea to transfer the fluid movement of your tripod head to the plate that the camera rests on. I have some work to do on mine now. Thanks for posting this. Great work!
 
This is really well designed. I've never thought of designing my own jib until I saw this video. Of course you want to transfer the fluid head to the top of the jib! This is so well crafted.


Let me ask you though, why did you use a barn door hinge rather than a 90 degree piece of metal? What's the benefit of the hinge? I suspect it was conveniently cheap and serves no purpose, but it does appear to weaken the overall structure. Also, the transfer of energy from the guide bar to the camera platform might cause a jiggle within the moving parts of the hinge. This transfer of energy would best be served by a solid piece such as this, no?
90.GIF
Not sure how much more expensive those welds would cost. It would probably double the budget, heh. But really, anything besides a hinge should be OK.
 
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Knoxworth said:
This is really well designed. I've never thought of designing my own jib until I saw this video. Of course you want to transfer the fluid head to the top of the jib! This is so well crafted.


Let me ask you though, why did you use a barn door hinge rather than a 90 degree piece of metal? What's the benefit of the hinge? I suspect it was conveniently cheap and serves no purpose, but it does appear to weaken the overall structure. Also, the transfer of energy from the guide bar to the camera platform might cause a jiggle within the moving parts of the hinge. This transfer of energy would best be served by a solid piece such as this, no?
90.GIF
Not sure how much more expensive those welds would cost. It would probably double the budget, heh. But really, anything besides a hinge should be OK.
Click to expand...


I guess I could have used a one piece plate with the two 90º pieces of aluminum welded at both ends as you've mentioned but as I was shopping around for parts when I first started the project, the hinges were what I found first and since they weren't loose hinges like I normally see, so I thought why not.
These hinges are actually built with tight plastic bushings in between they are really sturdy and tight with no play at all. I'm thinking they were assembled on a press.

The hinges do not cause any issues or jiggles at all when the weight from the guide bar is transferred to the camera plate up top.

I also have not found that the hinges weaken the overall structure. I have used this crane with the redrock lens adapter and additional gear making it heavier and it has always worked with no issues. I'm really happy with it.

Oh and yes, about the budget. The shop charged me per weld and cut, so that would definitely have added a few more dollars to it.

The first few seconds of this video shows the crane being used with the lens adapter on a Music Video shoot: http://www.youtube.com/watch?v=vyy6FJQchgw&hd=1
 
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