d) Magnetic screws and larger metal structures will cause constant deflection
interference to the magnetic compass.
Any power supply cable or magnetic screws cannot be mounted within 10cm around the flight
controller. Motors, gimbals and other magnetic devices cannot be mounted within 15cm around
FC. Compass should be mounted 30cm away from the engine.
User can use external compass if the electromagnetic interference around the flight control is
serious and unavoidable
Things may interfere PWM output signal:
a) radio transmission device and its transmitter antenna, power supply cables, any
magnetic device
b) It may cause jittering and other abnormal conditions if PWM signal is interfered by
the electromagnetic field.
User can add anti-interference equipment like magnetic rings and shielding nets if
there is strong electromagnetic interference.
Structural interference
The vibration from drone will affect the flight controller. User can add shock
absorption unit to avoid flight controller touching or colliding to drone body.
In a sudden collision, flight controller cannot judge if the vibration is caused by the
flight or structural interference. This kind of defect is artificial.