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Phantom 3 compass
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PaulSouthport
lvl.4
Flight distance : 1448799 ft
United Kingdom
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Hi all

I had my P3S replaced by the retailer because of repeated (and easily repeatable) compass errors causing a drop into Atti and unreliable GPS readings. DJI offered a RMA but given the Phantom was new I opted to have it replaced.

The replacement has exactly the same issue - I can induce the compass error at will.

For info, this is on FW 1.7.90 and DJI Go 3.1.0 on IOS. IMU was calibrated and compass calibration was correct. Test flights were done in 3 different locations, all at least 1/3 mile from any metal, reinforced concrete etc. no metal objects on my person and calibrated 20 feet away from the TX, phone, flight bag etc.

Here's the question: Is the P3 compass succeptible to cold? I ask because the errors increase as the temperature drops. To test that, between flights I held the compass in my hand for a few minutes to raise it's temp and the frewuency of errors/ease of reproduction dropped, but increased as the flight progressed.

As the errors increased the arrow in the DJI Go radar moved about 10 degrees off to clockwise compared to the actual heading.

Temp outside was 7C dropping to about 5C.
Also, I believe the compass is sold as Part 29, although the description of this item says Pro/Adv. Is that the correct item? I intend to buy it separately to see if that improves things.



2016-12-3
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Betamace
Second Officer
Flight distance : 2133 ft
United States
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I would have gone the DJI RMA route. Better odds for getting a properly functioning compass that way.
2016-12-3
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PaulSouthport
lvl.4
Flight distance : 1448799 ft
United Kingdom
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That is still an option, my RMA ticket is good for another 3 weeks.
It's my last resort though - sending to Netherlands over christmas means I'll likely be without it until after I return from holiday in mid-Jan, a fate worse than Christmas TV
2016-12-3
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Hawks100
lvl.4
Flight distance : 134580 ft
United Kingdom
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You seem to be having tones of trouble with your P3A.Get a refund..  I would treat yourself to a P3A and be done with it. It would save you time an heart ache. Worth it in the end.
2016-12-3
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PaulSouthport
lvl.4
Flight distance : 1448799 ft
United Kingdom
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I think you may be right, at UK Drone show tomorrow so temptation will be all around me....
2016-12-3
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Hawks100
lvl.4
Flight distance : 134580 ft
United Kingdom
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Leave your wallet at home.
2016-12-3
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DJI Mindy
Administrator
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PaulSouthport Posted at 2016-12-4 03:56
I think you may be right, at UK Drone show tomorrow so temptation will be all around me....

Did you contact the tech support and send it in?
2016-12-4
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PaulSouthport
lvl.4
Flight distance : 1448799 ft
United Kingdom
Offline

Hi, yes I did speak to DJI support, but rather than send it away I had it replaced by the retailer under U.K. Consumer law
2016-12-5
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