[steveg]

Another couple of things to check is to be sure that your camera is in focus and that the backup battery is fully charged. A lot of times when the backup battery is low, you can get some pretty strange behavior from the camera. Also, we're using a custom scanning algorithm, and received sort of a weird jerky motion when the max angle that the camera was allowed to tilt to was less than the angle it needed to be at to track.

The scanning algorithm wasn't paying attention to the maxes set by Kevin's code, so it would find the target, then When tracking, it would say "Hey, I'm too far up, let me tilt down" and lose the target, then it would go back to the scanning code... ad infinitum.