User Manual

Appendix D – Problems with Self Level
The following will cause accuracy issues with Self Level.
• Vibrations are the most common cause – balance your propellers, including the hubs.
Balance your motor bells. Ensure you don’t have bent motor shafts. Ensure the engineering
quality of your prop adaptors is acceptable. Finally, dynamically balance your motor with
prop and prop adaptor.
• Arming outside the 20deg limit – arm the multicopter when it is level.
• Exceeding gyro rate while flying – ensure the gyro rate is higher than your expected
manoeuvres. This will cause catastrophic issues if self level is switch on as the KK2.1.X will
have no idea which way is up.
• Temperature changes – let your multicopter acclimatise to the temperature you are going to
fly in before arming.
• Drifting gyro – gyros drift over a short period of time (minutes). During long flights, you may
need to land and rearm to recalibrate the gyros.
• Receiver selection – see Appendix E.