100KM

APM2.6 Compass Issue?

Hi, 

I just got my new APM2.6 installed, and placed the GPS/compass on a riser above the APM (4"). Both the APM and GPS/Compass are facing the correct way (arrow forward). When I do my compass live calibration, I look up the declination for my area (-18.5) and enter it into MP, then click on live calibration and do the dizzy dance.

When I look back at my heading in MP, the red line is off by almost 180 degrees? I have to change the declination to 125 for the red line to point in the correct direction.

I swapped the GPS/Compass for another one, and by following the same process I find that I need to enter 130 as the declination for the red line to line up properly.

I have two other APM2.5's and an APM2.0, these have the red line pointing in the correct direction after setting the declination to -18.5 and doing the compass dance.

Questions, would this make a difference on the APM2.6 if I manually set the declination until the red line lines up? Is there something wrong here? Could I just twist the GPS module physically around on the standoff to make the red line point correctly? (and would this have a negative impact on flight?

Thanks

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Replies

  • Easy solution. The compass is actually mounted upside down in the enclosure. There is a parameter you need to change to reflect this orientation. Can't remeber the ne of the parameter, but the wiki does have the relevant info...
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