Ok. I need to create a camera crane. It dosn't have to be very big since I'm using it for stop motion. Just a simple pan and tilt crane with a counterweight to off-set the camera. Now, I can make a regular one very simply using a video crane method that you can find on this site. However, this crane must do 2 things.
1. It must be able to move at incredibly small increments. Only fractions of an inch at a time.
2. The crane must be able to hold it's position in a very sturdy manner. It cannot move even in the slightest because stop-motion requires that the camera does not move at all while individual pictures are being taken.
For the life of me, I can't figure it out. Traditionally, a "step motor" is used to create the individual movements for things like this. But they are incredibly expensive. I've had more luck with gears and servos, however I want to figure out the logistics before I just go buy gears individually on a website that may or may not work.
Your help would be appreciated. Thank you.