hello,
i just received 5 HD-3001HB standard servos from HK
unfortunately one of them is dead but the others are working but in a weird way
1- speed is ok
2- torque is ok
3- centering is ok and average for 1 servo
the problem here that i keep hearing that servos' motors are keeping buzzing in the idle mode of the centard position i have to move the Tx stick a little bit to make this sound stops (its sounds like ZZZZZZZZ) and i feel the servo is vibrating from inside
am worry about the servos' gears
is this a normal behavior ?