Servo value of 0 = Full Power/Speed Reverse
Servo value of 127 = Stop
Servo value of 256 = Full Power/Speed Forward
Check-out the ROBOTC Webinar for complete details:
www.education.rec.ri.cmu.edu/fire/media/ftc_webinars/week3/FTC%20Week%203%20Cont%20Servos.html