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The flexible camera arm finally broke, in multiple places. I ordered a heavy duty arm from Amazon, but it was damaged in delivery and never even reached me. So, I thought this was a sign I should make it myself.... I got inspiration from a desk lamp and scaled it up. The video gives most of the details of the design of this heavy duty camera arm:
https://youtu.be/YembqfMjomg
The arms are 480mm between centres and 10mm wide 15mm deep aluminium U-section.
When you are looking for strength, do not choose aluminum. Particularly not aluminum extrusions. I hope you don't love your camera.
Had a satellite dish made entirely of aluminum once upon a time. It kept cracking the trunnions that supported a 20' dish. Manufacturer tried several ways to repair it, different alloys and such, but what worked was to replace the aluminum trunnions with steel trunnions. The steel was more than twice as strong as the strongest of the various aluminum alloys they'd tried. The 10-ton jackscrew that raised and lowered the antenna put the trunnions in tension to raise the antenna, and compression to lower it, and the aluminum was simply not strong enough.
Why was this important to me? I used to have a photo of myself on the base of the antenna, with the antenna up over my head. That photo was taken about 2 minutes before the cracks were discovered for the first time. The antenna itself weighed several tons, and the hardhat I was wearing wouldn't have helped much at all if the thing fell on me. Before I was up there, several of my people were up there, too. Could have killed any of us. You're mounting this thing over your head. It doesn't weigh tons, but it could still give you a pretty good whack on the head. You don't seem to wear a hardhat in your shop. You might want to get one. Or make the thing of steel, and it will be that much stronger. Go ahead and put the springs on it, too. And friction locks for the joints. And forget might, get a hardhat anyway! Paranoia pays! ;)
Bill
Hi Bill, thanks for the concern, but I've worked with aluminium a lot and this is well over-engineered for a camera mass of up to 1kg. The aluminium is well inside any limits. Plus, if you look at the design the single failure points are the steel pin into the clamp and the brass threaded bolt into the camera. Any damage is more likely to be from my silly error in moving the arm or releasing a locking pin. Best regards, NigelQuote:
Originally Posted by WmRMeyers
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Thanks editor@glue-it.com! We've added your Heavy Duty Camera Arm to our Photography and Videography category,
as well as to your builder page: editor@glue-it.com's Homemade Tools. Your receipt:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-heavy-duty-camera-arm"> <img src="/uploads/250117/homemade-heavy-duty-camera-arm.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-heavy-duty-camera-arm">Heavy Duty Camera Arm</a> <span> by <a href="https://www.homemadetools.net/builder/editor%40glue-it.com">editor@glue-it.com</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/mount'>mount</a>, <a href='https://www.homemadetools.net/tag/photography'>photography</a> </div> </div> </div> </div>
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Now I've finished the arm with proper nuts and bolts, double wing nuts and a knurled split pin knob - thought I should make a final run through of it before I start using it in anger....
https://youtu.be/Svm_Pc15jb4
Subscribe if you want to see the videos I make using this of my model engineering projects.