Why are my servos buzzing loudly even when stationary?

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

Answer: Loud buzzing in servos while stationary usually means they are under continuous load or receiving jittery signals. First, check your control signal: ensure your transmitter or microcontroller is sending a clean, stable PWM signal without noise or rapid changes. Use an oscilloscope or a servo tester if possible. Next, verify the servo isn’t mechanically stalled or binding—any resistance can cause the motor to strain and buzz. Also, confirm your power supply provides steady voltage and sufficient current; insufficient power can cause servo motors to buzz. If you’re using a microcontroller, add a small delay or smoothing on the control signal to prevent rapid position changes. Finally, try disconnecting the servo from your control system and apply a fixed PWM signal; if the buzzing stops, the issue is signal-related. Replacing the servo may be necessary if it continues buzzing without load or signal issues. These steps should help identify and fix the buzzing noise effectively.