Hey there,
I have a robot as my FYP and it has two hobby servo motors Parallax Standard Servo (#900-00005) as manipulator actuators. the motor data sheet doesnt give extended information about powering it, all it shows that the maximum operating voltage is 6 V dc. the problem is that when the motors are changing angels (rotating); small fluctuations around the desired orientation are noticed and they never die out. i tried to supply the motors with different power supplies that have greater amperages but nothing changed. BTW these fluctuations are noticed when the motor is off load too. Please Help Me.