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32
Flight
Digital Compass Calibration
Without GPS, please skip this step
Why calibrate the compass?
Ferromagnetic substances placed on multi-rotor or around its working environment will affect the reading of
earth magnetic field for the digital compass. It also reduces the accuracy of the multi-rotor control, or even
reads an incorrect heading. Calibration will eliminate such influences, and ensure MC system performs well in
a non-ideal magnetic environment.
When to do it?
The first time you install Naza on your multi-rotor.
When the multi-rotor mechanical setup has changed:
a) If the GPS/Compass module is re-positioned.
b) If electronic devices are added/removed/ re-positioned (Main Controller, servos, batteries, etc).
c) When the mechanical structure of the multi-rotor is changed.
If the flight direction appears to be shifting (meaning the multi-rotor
doesn’t “fly straight”).
The LED blinking, often indicates abnormality blinking when the multi-rotor spins (It is normal for this to
happen only occasionally)
What not to do:
Don’t calibrate your compass where there is strong magnetic interference, such as magnetite, car
park, and steel reinforcement under the ground.
DO NOT carry ferromagnetic materials with you during calibration, such as keys or cell phones.
You don’t need to rotate your multi-rotor on a precise horizontal or vertical surface, but keep at least
45° difference between horizontal and vertical calibration.
The GPS will not work in the polar circle.
Calibration procedure
STEP1:
Quickly switch the control mode switch from
Manual. Mode
to
GPS ATTI. Mode
and back to
Manual. Mode
for 6 to 10 times, The LED indicator will turn to constantly yellow
.
STEP2:
Rotate your aircraft around the horizontal axis (about 360
o
) until the LED changes to constant
green
, and then go to the next step.