Instructables
Picture of GoPro Gravity Slider


The GoPro Gravity Slider is a custom mount for a GoPro that allows it to shoot footage of an object as it is falling. If you drop the object and the GoPro at the same time, you'll see the whole fall down to the bottom. Then the object will splash or splat or break in some other way.

Or just watch the video below and you'll see what I mean.

 
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Step 1: Stuff!

Picture of Stuff!
Parts!
  1. plank of wood. This one is 6'
  2. 2 metal rods
  3. Afinia H-Series 3D Printer
  4. GoPro HERO3 camera
  5. wood screws
  6. rubber spacers

Step 2: Printed parts

Picture of Printed parts
There are three pieces for the slider. The two blue pieces were printed on an Afinia 3D Printer and hold the rods in place. The middle piece was printed on an Objet printer, but could've been printed on an Afinia as well.

If you don't have a 3D printer, you can easily make these pieces with some scrap wood and a drill press. Instead of the custom GoPro mount that's automatically included, you can attach a regular GoPro mount onto the wood with the included adhesive.

STL files are included below.

Step 3: Attach first end cap

Picture of Attach first end cap
gravity-4.jpg
The caps are easily attached. Here's the process:
  1. drill pilot holes
  2. place rubber spacers over holes
  3. attach cap with wood screws

Step 4: Attach second end cap

Picture of Attach second end cap
gravity-6.jpg
Attaching the second end cap is just as easy. For alignment, insert the rods before you attach them.

Step 5: Attach slider

Picture of Attach slider
gravity-8.jpg
Now that the rods and caps are in place, put the slider mount on the rods. Once it's on you can insert the rods into the bottom mount.

Step 6: Attach the GoPro

Picture of Attach the GoPro
gravity-11.jpg
gravity-12.jpg
Now it's time to put the GoPro on. Just slide the case with the GoPro in it onto the printed mount and insert the screw for it.

Once that's on, put some padding behind the case and secure the GoPro to the slider with some tape. Here I'm using two small strips of Gorilla tape. This last step helps to keep the camera from rotating on the mount on impact.
knexinventer10 months ago
you could use a custom set of springs to reduse bounce
The GoPro is [kinetic] shock proof, so you don't need to protect it against that. If the goal is to eliminate the bounce, that is a solved industrial requirement. You could:
1. Use sand to deaden the blow similar to a Dead Blow Hammer http://en.wikipedia.org/wiki/Dead_blow_hammer
2. Place very strong Neodymium Magnets on the mount slider and the bottom of the support system.
There are many ways you could implement either of of those. Since you have a 3D printer, you could reprint the sliding mount to hold a rod that extends out the bottom. Then place the rig above a bucket of sand. When the rod hits the sand it will sink a little, but will not bounce. You could even use different diameter (or taper) rods to cause it to sink farther giving a slower stop.

I made some mockups of what this modification may look like.
GoPro-sand.jpgGoPro-bucket.jpg
zombietron10 months ago
you should look at putting a soft close draw actuator on the landing, needs something to reduce the sudden impact of the footage
alcurb10 months ago
Super nice rig!!

For the landing bounce suppression, how about attaching a wooden wedge, similar to a plain old doorstop, on the wood structure between the camera and the wood, so that the camera slides and sticks to the thin end of the wedge and thus suppressing any bounce?
heibert10 months ago
May be not a springs, because they will make camera pop up. But what about make metal rods non-parallel at the bottom, so the camera's dolly could "jammed" between them?
Horef10 months ago
nice idea :)
you should make a longer one and have the gropro going like a sec before the object,
looks great! :)
DonaldB10 months ago
I would suggest getting a couple of springs for the bottom. It will soften up the landing for the camera and you wont get that harsh stop. Just a couple of cheap, fairly soft springs should do the trick, or even better, a progressive rate spring if you can find ones that fit the rods.
Very cool design, keep up the good work!
johnokdk11 months ago
where did you buy those metal rods?
lebowski11 months ago
Awesome! Nicely done.