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APM Copter 3.3.2 help with Compass variance

Posted by Michal Paal on February 7, 2016 at 9:43am

Hello,

I'm having a battle with my compasses. I use pixhawk clone and M8N GPS with compass.

I'm unable to find orientation setting, where I will not have EKF compass variance errors.

I think that this is not mag interference problem because this happens when disarmed.

I've disasembled external GPS/compass puck and there are following axis markings:

           x axis

z axis  O------->

           |

           |   y axis

          V

My APM configuration is in the attachments, and also example values when facing north.

Do I have faulty compass? or I've tried wrong Orientation settings?

compass1.png

compass2.png

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Replies

              • David Boulanger > Michal Paal February 7, 2016 at 1:49pm

                Based on the pictures I think Orient of zero is what you want.

                Regards,

                David R. Boulanger

            • Michal Paal > David Boulanger February 7, 2016 at 1:27pm

              I does not have fix as I'm indoors, and GPS antenna is pointing Up, when mounted as on one of pictures. When GPS antenna is up, compass is down. I can go out and try for GPS fix tomorrow.

              • David Boulanger > Michal Paal February 7, 2016 at 1:44pm

                See what happens when you have a GPS fix.  Do you have a window you can put the copter by now and see if you can get a fix?

                Regards,

                David R. Boulanger

      • Michal Paal > Michal Paal February 7, 2016 at 12:46pm

        And this is disassembled part.

        GPS antenna on the top, and the second image is from the bottom side

        IMG_3600.JPG

        IMG_3597.JPG

        https://storage.ning.com/topology/rest/1.0/file/get/3702734699?profile=original
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