Compass linearity problem. what is wrong ?

I've entered declintion.

When I point my plane to what it thinks is west, one would think the east would be in perfectly opposite direction, no , east is almost 40degree off.   Same, but smaller error in north-south direction.

Throttle have no influence on compass, and there's no power close to the magnetometer.

The magnetometer is mounted on top of APM. (as suggested by wiki.)

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Replies

  • Sounds like the magnetometer null offsets are not calibrated. This is done automatically, but you must rotate the plane around the z axis a few times. Then hold it sideways and rotate a few more times.

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