KG wrote:Any chance you could make instructions for the Quickcam 9000 rig you built?
Sure I can KG. This PICTURE explains quite a lot.
The boom has two main arms in parallel:
- The lower arm rotates the boom (using the Boom Axle). Because the two left axles are approximately the same space apart as the right axles, the camera stays horizontal when the boom is raised.
- The Pitch Axle levers the upper arm so it’s anchor point moves a little bit forward or back which changes the pitch of the camera. The camera pivots on the right lower axle.
There's more pictures (after moderation) HERE which show the gearbox. The secret to it all is the worm (screw gear) drive. The axle (has a wheel on one end) that turns the worm drive very easily and finely turns the drive cog. Drive cogs turn Pitch and Raise Boom axle. The advantage of the worm drive is the difficultly to turn using the Drive cog. This means even with all the camera weight on the boom, the boom arm won’t lower all by itself. So you don’t have to lock the movement or hold the wheel position all the time.
In the gear box there is two of these axle turning worm drives one on top of the other.
If you need any further help send me a PM.
Lego technic has a whole robot series called mindstorm. I built a fully automated gantry crane using it.
Have a look at THIS. If it gets a bit boring in real time skip ahead to around 3:50.
I wouldn't be surprised if I use a robot camera one day while making a Brickfilm!
Last edited by bodville (January 7, 2010 (03:17am))