[Mike Soukup]

I'm assuming you have the servos hooked up directly to the camera and are using the tracking feedback loop in the camera. In the default code in user_camera.c : camera_track_update() the RC gets some data back from the camera. Among this data is the pan & tilt positions (cam.pan_servo & cam.tilt_servo) of the servos. The pan position is used in user_routines.c : Camera_Processing() to make the robot turn left / right, and with a few more lines of code you can make the robot drive forward / backward based on the tilt.