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Compass / Accelerometer Calibration
Compasses
The Compasses have been calibrated, however fine adjustments can be made manually in order to
ensure the direction is properly indicated in your aircraft, depending on proximity of metal in the
airframe and other effects. The full automated calibration process will also be explained.
The AHRS uses 2 compasses and the GPS. Compass #1 is inside the externally mounted GPS antenna,
and Compass #2 is inside the Flight Controller.
Under the COMPASS section you will find the
COMPASS_OFS
parameters (see screenshot). These can be
manually modified to fine tune the compass heading. Once you make a change be sure to click the
<Write Params>
button on the right to save the changes to the Flight Controller. The Mission Planner
heading display under
<Flight Data>
will update in real-time as these parameters are written. It is also
advisable to take a backup copy of all parameters with
<Save to file>
.
COMPASS_OFS_X
Offset for Compass 1 in X direction in mGauss
COMPASS_OFS_Y
Offset for Compass 1 in Y direction in mGauss
COMPASS_OFS_Z
Offset for Compass 1 in Z direction in mGauss
COMPASS_OFS2_X
Offset for Compass 2 in X direction in mGauss
COMPASS_OFS2_Y
Offset for Compass 2 in Y direction in mGauss
COMPASS_OFS2_Z
Offset for Compass 2 in Z direction in mGauss