We’d call it a robot, but [Eric Buijs] calls it a dolly. [Eric] bought a Makeblock starter robot kit last year, but never did anything with it. He recently wanted a camera dolly to help shoot project videos and the Makeblock hardware fit the bill.
[Eric] found that one of Makeblock’s example videos showed off a camera dolly but had no construction details. He cracked open the kit and got to work replicating what he had seen. Two 6V motors combined with a reduction gear, a belt, and some wheels, and the dolly now moves under computer control!
Continue reading “Camera Dolly uses Makeblock”
While [Ted] was poking around the ‘net, he came across a neat little product called a camera dolly. These are used to add an artistic flair to filming. They are similar to a camera slider but can roll around on the floor or a table and do not need to follow a track. [Ted] wanted a camera dolly but the cost of a professional product seemed too expensive for what he’d actually be getting, so he set off to make his own.
[Ted] first designed the dolly in a CAD software and printed out templates for the parts. Those templates were then transferred to plywood and cut out with a jig saw. Three inline skate wheels support the frame and allow the unit to roll around. Mounted in the center of the frame is a pan and tilt camera mount.
The extraordinary part of the build is that the angle of each wheel can be adjusted independently. This allows the dolly to do anything from rolling in a straight line to gradually traveling around a curve or even just spinning the camera in place. Each wheel mount has degree indications so that they can be adjusted very precisely as well as be returned to a previously recorded position.
Driving a carriage up and down a cylindrical object isn’t the most popular activity but that is certainly no reason not to build such a device. Check out [Ryan’s] creation that does just that, he calls it a Tubular Drive.
There isn’t much going on here, basically there are 4 wheels that grip a pipe. Two of those wheels have integrated gears and are driven by a DC motor. The remaining two wheels are idlers. When power is applied to the motor, two of the wheels spin, which then moves the entire assembly down the pole. A quick reversal in polarity brings the unit back the other way.
With those 3D printed plastic wheels you may think that traction would be an issue but [Ryan] insists that it is not a problem. The ABS wheels were treated with an acetone bath to smooth out the print layers and the distance between the wheels can be adjusted using a couple of bolts. Together that allows enough surface contact and pressure to ensure slip-free traveling.
Although the wheels were made to grip 1/2″ electrical conduit, it would be very easy to adapt this design to fit around and climb up all sorts of cylindrical objects, maybe even rope! Perhaps v-wheels with a spring tensioner system would allow for traveling on different size tubes while also adjusting for any variation in the diameter of a single tube.
[Ryan] says version two will have a linear encoder and be driven by a stepper motor. Check out the video after the break…
Continue reading “Pole Climbing Device Runs Up Flags and Undies”
Professional camera gear is expensive, which is probably why there is such a huge DIY field for camera equipment. Here’s another great DIY camera slider that you can build for cheap.
Similar to other rigs we’ve seen, the heart of this design makes use of skateboard wheels — they’re cheap, have good bearings, and are easy to mount. He’s created a dolly for them using a T-strap bracket, which is used for wood framing — the wheels mount directly to it without any modification.
What we think is unique about this build are the rails [Shootr] decided to use. They’re U-Post fence posts — strong, rigid, and probably one of the cheapest forms of processed metal you can buy. To hold them together, he’s using a threaded rod with two pieces of 1/2″ square steel tubing, bracing the fence posts. This wedges the dolly in between them with just enough slack to slide smoothly back and forth.
The other method of making a camera slider like this is using tubular rails, which also allows you to add a curve in your camera track. And if you’re looking for a precise, 2-axis camera dolly… you should check out this one!