Servo MG995 making noise at rest

Hello,

I bought a MG955 servo and everything seems to work but the servo makes a strange noise at rest (even if I do not write on the port) after some time (the same noise as a big transformer ?!) Is it normal ? I just plugged the +,- and control cable on one arduino port .. nothing else.

http://www.amazon.com/TowerPro-Metal-Torque-Digital-Helicopter/dp/B009NP4GCG

Thanks, Philippe

If the servo is not under load or against the internal hard stops, it would normally be quiet.

Hello,

Thanks a lot .. I now attach() and detach() the servo in the loop so the power is off when it has to rest and the noise disappear

Thanks again,

Philippe

Note that some digital servos make an annoying whine when operating due to the higher internal PWM frequency to the internal H-bridge.