What Causes Jittery Servos on an FPV Wing and How to Fix It?

Question: What causes jittery servos on an FPV wing?

Answer: Jittery servos on an FPV wing usually result from electrical noise, poor signal quality, or power supply issues. First, check your servo wiring and connectors for any loose or damaged connections. Ensure the servo is receiving a stable power supply—consider using a separate BEC (Battery Eliminator Circuit) or a capacitor across the power leads to smooth out voltage spikes. Next, verify your receiver antenna is properly positioned and not obstructed, as weak signals can cause erratic servo movement. If you’re using a PWM signal from a flight controller or receiver, ensure the signal wires are not running parallel to high-current wires, which can induce interference; reroute them if necessary. Also, try swapping the servo with a known good one to rule out mechanical faults. Finally, check your transmitter and receiver settings for correct endpoints and trims to prevent unintended servo twitching. Following these steps should help eliminate jitter and improve your FPV wing's control response.