Why do my servos buzz loudly even when stationary?

Question: Why do my servos buzz loudly even when not moving?

Answer: Loud buzzing from servos at rest usually means they are receiving a continuous signal telling them to hold a position under load. This causes the motor to constantly adjust, creating noise. To fix this, first check your servo’s neutral position in your controller or transmitter—ensure the pulse width is centred (usually around 1500 microseconds). Next, confirm the servo isn’t mechanically restricted or under strain, as this increases buzzing. If you’re using an Arduino or similar, verify your code sends the correct neutral signal and that your power supply provides stable voltage (typically 4.8–6V). Excessive voltage or current can increase noise. Finally, try disconnecting the servo signal wire; if buzzing stops, the issue is related to the input signal. Adjusting these steps should reduce or eliminate the buzzing, keeping your servos quiet when idle.