So I'm building a jib...

S

Shaw

Veteran
And it's nearly complete. I have all the parts assembled but I'm not comfortable with the bolts and nuts I am using at its tilt point. Sure the crane tilts but in the process it loosens the bolts a bit. Last thing I want is for my DVX to fall from 12 feet in the air.

Does anyone know how to alleviate this problem? I was thinking that I could weld the bolt on but that's rather drastic and I don't have any welding equipment.

Sorry I don't have pictures. I'm going to get some up as soon as I have access to my digital camera.
 
LocTite? Hmmm...

I'd use a castle nut and a cotter pin.

Actually, I'd run a sleeve through the pivot point and have the bolt go through that, rather than having the jib pivot on the bolt itself. Assuming the jib arm is aluminum, you probably don't want the wear & tear on it...

Dan
 
Mmm interesting suggestion about the sleeve. Though I must ask; what is a castle nut and a cotter pin?

Excellent point serious doggy! I'm not worried about the entire thing collapsing, just the camera mount bracket falling off. Granted, that would still hurt like hell... so, excellent point :)
 
I think those are German words. I'm continually amazed at the highly technical language, Dan. The whole "firewire optoisolaters" thread really threw me in for a loop. I still have no idea what an optoisolator is, but surely it would do the trick if it exists...

Brian
 
Ah, interesting. Thanks for the link. I think I'll just go with the locktite unless anyone can point out a large advantage of the castle nut and cotter pin method. I won't need to remove these so...
 
thisiswells said:
I think those are German words. I'm continually amazed at the highly technical language, Dan. The whole "firewire optoisolaters" thread really threw me in for a loop. I still have no idea what an optoisolator is, but surely it would do the trick if it exists...
Click to expand...

:engel017:

Oh...an optoisolator...

Basically, an LED on one end and a photocell on the other. The LED goes blink blink blink with the digital signal, and the photocell "sees" it, re-generating the signal. (incredibly over-simplified, and not really how it works these days...but the principle is the same.)

The salient point: there is NO electrical connection between the two sides of the circuit. Just a light beam. :)

Dan
 
Thanks Dan.

Coffee: no sadly not. It's still laying in my basement 85% complete. I decided to redesign the whole mounting bracket for the camera for better stability and control. I did find a nice block of iron that I drilled and tapped which I now have bolted only the rig. Makes a great counterweight and it's simple to remove.
 
Kinda late, but I just went through this how-to-tighten-a-nut-thing while building a ultralight one-man dolly a couple days ago (pics soon, building ultralight track now).

Put on two nuts, and tighten them against each other. They'll never come loose unless you use a wrench on BOTH of them, and it's easily and quickly adjustable.
 
I would atleast describe what i used to design and develop this jib. Isn't that the primary reason for this section of the forum?

Im interested in building one for myself. Can u layout your design here?

Thank you.
 
Sure. But considering that it's still not complete (so many things to tweak so little time) it may or may not be what you are seeking.

Give me a few days. I have some other things I need to take care of first.
 
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