I want to use a servo to rotate the optical sensor. When the sensor variable switches on, I want the chassis to turn the exact degree of the servo. (My engineer says to forget about it, so I need to do this quick before we rule it impossible

). Anyway, How do I get input or anything to control the turn degree on the chassis?? We have tank drive so it seems harder than the one joystick drive system we had last year.
I'm extremely thankful for any help I can get, and thanks 47 for the great site.
mjt