Gorillapod Positionable Camera Dolly
by EricYoung, published
This is a highly positionable camera dolly system for a Gorillapod tripod. It enables you take some pretty awesome moving video shots and can be easily broken down for convenient storage.
The idea is based on this $150-$200 product and you can watch their video to see what kind of moving shots that can be taken with this device: http://www.kickstarter.com/projects/jj1/cineskates-camera-sliders?ref=live
This design has an added axle for two back wheels and an adjustable rod to tie in the axle to the front wheel. This way the wheels don't bind, there is quite a lot more stability and you still get almost the same amount of possible positions offered by the Cineskates product. The front wheel is on a swivel and can be easily positioned to turn the dolly - just like a tricycle.
Total cost of all the hardware was under $10 at my local ACE hardware store (mine has a 12" long threaded rod because the store didn't have 8"). I had the skateboard wheels lying around, but if you don't then thrift shops often have inexpensive rollerblades if you want a set of wheels on the cheap.
If you want to use this dolly with your phone, here is a Universal Smartphone Tripod Mounting Bracket that will hold any smartphone: http://www.thingiverse.com/thing:30813
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The PDF drawing attached has the BOM and exploded views of the assembly with item locations. I think the assembly process is pretty self-explanatory once you've seen the drawing, but if there are any questions feel free to ask.
Making this requires using a Soldering Iron to weld/melt Threaded Inserts into the printed pieces. If you don't know how install the inserts it's super easy - look here for instructions: thingiverse.com/thing:30576
Mine was printed in PLA with 60% hexagonal infill for the clamps and 100% infill for the coupler and swivel.
To attach the Gorillapod you loosen the 8-32 screws of each clamp, push each end of the Gorillapod into its respective clamp, then tighten the 8-32 screws. It actually seems to work fine without tightening the clamps, so do whatever floats your boat.
The ZIP file contains a pack-and-go of all the Solidworks 2012 files including the drawing.