I am trying to write a program that will sweep a servo from 0 to 180 degrees. This is pretty basic but I am including a webcam that Is attached to the servo. I will be using the programmer IDE since it has an arduino library to do tracking. The video will be fed into my laptop where the programmer program will do object tracking and transmit the object location in terms of degerees to rotate the servo through serial to the arduino. I am just wondering how to i tell the arduino to stop sweeping the servo and move X degrees from the CURRENT position. This is where my problem is seeing as in the servo library you give a 0-2400 signal to rotate the servo but I want to move a certain number from the current location in the sweep motion. Thanks for any help you can give.