Symptoms
- Drone drifts to one side even with no wind
- Won't hold a stationary hover position
- Tilts slightly in one direction at rest
- Drift worse right after takeoff, better later in flight
Likely causes
- CommonIMU (inertial sensor) needs recalibrationThis sensor helps the drone understand its own orientation and level.
- CommonCompass interference from the takeoff locationMetal, rebar, or electronics near takeoff can cause a lasting drift.
- PossibleGPS signal not fully locked before takeoffWeak GPS can cause position-hold drift especially just after takeoff.
- PossibleUneven propeller wear or a slightly bent propellerSmall imbalances can cause a consistent lean in one direction.
- Less commonTrim or calibration settings drifted from a previous crash or hard landingWould need the drone's basic flight parameters reset.
What to do
- Move to a large, open, flat area away from metal structures or vehicles for takeoff.
- Recalibrate the IMU and compass through the app's calibration menu, following the exact motion instructions.
- Wait for a strong GPS lock indicator before taking off.
- Inspect propellers for uneven wear, small bends, or one being a different type than the others.
- Perform a test hover at a safe height and note if drift lessens after a minute as GPS stabilizes.
- Update firmware, since calibration bugs are occasionally addressed in updates.
- If drift continues after calibration in an open area with strong GPS and good propellers, have the flight controller checked professionally.
When to call a pro
If drift persists after calibration, a clear takeoff area, and good propellers, a drone technician can inspect the flight controller.
Safety
Use caution
Test hover at a safe, low altitude in an open area away from people when checking for drift after calibration.