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 stem from electrical noise, poor signal quality, or mechanical issues. First, check your power supply: ensure the servos receive a stable voltage, typically 4.8–6V, from a good-quality BEC or battery. Voltage dips or noise can cause servo twitching. Next, inspect your signal wiring; use shielded or twisted cables and keep servo wires away from the motor and ESC to reduce interference. Also, verify your receiver and flight controller connections are secure and that the receiver antenna is properly positioned. On the mechanical side, check for binding or friction in the servo linkages and hinges. Lubricate or adjust as needed to allow smooth movement. Finally, test with a different servo or receiver channel to isolate the issue. If the problem persists, consider adding a small capacitor (e.g., 0.1µF) across the servo power leads to filter noise. Following these steps should significantly reduce or eliminate jittery servo behaviour on your FPV wing.