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Have to calibrate the compass every time I start
1658 8 2019-4-7
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WD9EON
Captain
Flight distance : 686886 ft
United States
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Since the last firmware update I've had to calibrate the compass every time I start the drone before it will start the motors.  Is this something DJI has implemented with the last update?  Before I went almost a year without having to calibrate and even when it said to calibrate, if I didn't the motors would still start.  Now they won't.  

What's up with this?
2019-4-7
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Geebax
Captain
Australia
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Conceptually you don't have to calibrate the compass before every flight, and if it is making you do so, this is the first time I have heard of it. Also, I have never heard of the aircraft not starting unless a compass calibration is performed. You need to look for other causes, were there any warnings on the screen? Perhaps uploading your flight log to: https://www.phantomhelp.com/LogViewer/Upload/ might help us see something.
2019-4-7
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DJI Stephen
Super Moderator

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Hello and good day WD9EON. I am sorry for the trouble this has caused you. Can you please try to colabrate the compass of the said drone once again. I will be posting and official DJI tutorial below on how to calibrate the said drone. In addition the reasons why you need to calibrate the compass of your drone are. First when the application prompts that the compass needs to be calibrated, the drone’s compass has suffered from interference as the aircraft was turned on in a place where there is magnetic interference. Make sure to fly the aircraft in an open area free of interference. Second when powering on the drone, ensure that the aircraft is at a standstill. If there is interference or the aircraft is powered on during movement, the compass’s orientation may be altered, and then recalibration is needed. Finally do ensure the flight stability, the application will prompt you to calibrate the compass when there is a need. Please follow the application and calibrate it. Please keep us posted on the said issue for us to help you further. Thank you.

2019-4-7
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WD9EON
Captain
Flight distance : 686886 ft
United States
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DJI Stephen Posted at 4-7 14:35
Hello and good day WD9EON. I am sorry for the trouble this has caused you. Can you please try to colabrate the compass of the said drone once again. I will be posting and official DJI tutorial below on how to calibrate the said drone. In addition the reasons why you need to calibrate the compass of your drone are. First when the application prompts that the compass needs to be calibrated, the drone’s compass has suffered from interference as the aircraft was turned on in a place where there is magnetic interference. Make sure to fly the aircraft in an open area free of interference. Second when powering on the drone, ensure that the aircraft is at a standstill. If there is interference or the aircraft is powered on during movement, the compass’s orientation may be altered, and then recalibration is needed. Finally do ensure the flight stability, the application will prompt you to calibrate the compass when there is a need. Please follow the application and calibrate it. Please keep us posted on the said issue for us to help you further. Thank you.

https://www.youtube.com/watch?v=DHCDJKChXTE

I was mainly checking to see if the drone's updated firmware had been changed so that you have to do that.  I've had the drone for two and a half years, this just started after the last update.  

Thanks for the reply.
2019-4-7
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Peterx
Captain
Flight distance : 1497290 ft
Germany
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Are you using P3s with fw 1.9.200 ?
2019-4-7
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Peterx
Captain
Flight distance : 1497290 ft
Germany
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Is that with your P3s?
2019-4-7
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ALABAMA
Captain
Flight distance : 10442687 ft
United States
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Try updating again.  That should not be happening.
2019-4-8
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WD9EON
Captain
Flight distance : 686886 ft
United States
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Peterx Posted at 4-7 23:23
Is that with your P3s?

yes, found the problem, imu warming up, so by calibrating the compass it had been on long enough for the imu to come up to temp.  I'll have to recalibrate the imu at a lower temperature, it's been cool outside when I had my previous flights.  

Thanks for the help guys.
2019-4-8
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NM_Quad
Second Officer
United States
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WD9EON Posted at 4-8 05:02
yes, found the problem, imu warming up, so by calibrating the compass it had been on long enough for the imu to come up to temp.  I'll have to recalibrate the imu at a lower temperature, it's been cool outside when I had my previous flights.  

Thanks for the help guys.

Glad you got it figured out.  A compass cal before every flight would become a nuisance fast.  Had to recal compass on my old P2V+ fairly often and got tiring.  So glad you're back in the air normally. (73 NA5N)
2019-4-8
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