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 are usually due to electrical noise, poor signal quality, or mechanical issues. First, check your power supply: ensure your servos receive a stable 5–6V supply with adequate current. Voltage drops or noise from the battery or ESC can cause jitter. Use a separate BEC or a filter capacitor if needed. Next, inspect your servo leads and connectors for loose or damaged wiring. Poor connections can introduce signal interference. Also, verify your receiver and flight controller connections are secure and correctly configured. Mechanical binding in the control surfaces or servo gears can cause erratic movement, so check for smooth servo arm and linkage operation. Lastly, try swapping the servo with a known good one to rule out a faulty servo. If your setup uses PWM signals, increasing the refresh rate or switching to digital servos can reduce jitter. Following these steps should help you identify and fix jittery servo behaviour on your FPV wing.