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 when stationary usually means they're under continuous load or receiving a jittery signal. First, check your servo's neutral position: if the control signal isn't centred at the servo's midpoint, the motor will strain trying to hold a position, causing buzzing. Use your transmitter or controller to ensure the pulse width is around 1500µs (neutral). Second, inspect your wiring and connectors for loose connections that might cause signal noise. Third, some cheap or worn servos buzz due to low-quality gears or electronics—consider replacing if the problem persists. Lastly, if your servo is mechanically bound or overloaded (e.g., stuck linkage), it will try to move continuously, producing noise. Make sure the servo horn and linkages move freely. To reduce buzzing, try powering the servo with a stable 5–6V supply and avoid long signal cables near motors or ESCs to minimise interference. Following these steps should help you eliminate unwanted servo buzzing.