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Disgusted by DJI customer care behavior, need technical help...
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<blockquote data-quote="Dronason" data-source="post: 14313" data-attributes="member: 553"><p>I think there is a difference between the manual and what the Go4 indicate during the calibration. In fact it seems that both are possible, it totally depend how the firmware is doing the calibration.</p><p>At least I followed the one in the Go4 app and it worked nicely.</p><p></p><p>I would do compass calibration as per Go4 app, IMU calibration. Finally a test flight for the compass, just climbing at 30 meters, do 2 360° rotations, one in each direction and land.</p><p>Then you can check the calibration by retrieving these flight records from the Spark as a .DAT file using DJI assistant 2, explained <a href="https://www.youtube.com/watch?v=ngEHdAlAh9A&feature=youtu.be" target="_blank">HERE</a>.</p><p></p><p>The following tools will extract the flight record from a DJI assistant DAT file into DAT file like FLYnnn.DAT and will use that file.</p><p>They are available <a href="https://datfile.net/CsvView/intro.html" target="_blank">HERE</a>.</p><p></p><p>There are:</p><ul> <li data-xf-list-type="ul">CsvView will plot the first flight record found in the DAT file.</li> <li data-xf-list-type="ul">ExtractDJI will split one DAT files containing flight records into one DAT file for each flight.</li> <li data-xf-list-type="ul">DatCon is a converter tool to generate various file format.</li> </ul><p>You must read the documentation on the web site before trying CsvView, it helps a lot to start correctly.</p><p>You can display several plots at same time and the zoom + cursor is sync over the plots.</p><p>There is also GeoPlayer that can plot the flight on map, also cursor is sync with plots.</p><p></p><p>Finally MagDataPlayer (see documentation for details) that plot the magnetic field vector. Note that it is sync with the zoom of the plots. Usually good to zoom on flight at some altitude before activating it so you can evaluate the calibration of the compass out of influence.</p><p></p><p>You should be able to check that accelerometers are correctly calibrated by checking the earth gravity on each of the X, Y and Z axis.</p><p>Gyro can be check for function with the 2 360° rotation.</p><p>Compass is checked by the 2 rotations and using the MagDataPlayer when zoom in the plot portion when altitude is at 30 meters.</p><p></p><p>Hope it helps.</p></blockquote><p></p>
[QUOTE="Dronason, post: 14313, member: 553"] I think there is a difference between the manual and what the Go4 indicate during the calibration. In fact it seems that both are possible, it totally depend how the firmware is doing the calibration. At least I followed the one in the Go4 app and it worked nicely. I would do compass calibration as per Go4 app, IMU calibration. Finally a test flight for the compass, just climbing at 30 meters, do 2 360° rotations, one in each direction and land. Then you can check the calibration by retrieving these flight records from the Spark as a .DAT file using DJI assistant 2, explained [URL='https://www.youtube.com/watch?v=ngEHdAlAh9A&feature=youtu.be']HERE[/URL]. The following tools will extract the flight record from a DJI assistant DAT file into DAT file like FLYnnn.DAT and will use that file. They are available [URL='https://datfile.net/CsvView/intro.html']HERE[/URL]. There are: [LIST] [*]CsvView will plot the first flight record found in the DAT file. [*]ExtractDJI will split one DAT files containing flight records into one DAT file for each flight. [*]DatCon is a converter tool to generate various file format. [/LIST] You must read the documentation on the web site before trying CsvView, it helps a lot to start correctly. You can display several plots at same time and the zoom + cursor is sync over the plots. There is also GeoPlayer that can plot the flight on map, also cursor is sync with plots. Finally MagDataPlayer (see documentation for details) that plot the magnetic field vector. Note that it is sync with the zoom of the plots. Usually good to zoom on flight at some altitude before activating it so you can evaluate the calibration of the compass out of influence. You should be able to check that accelerometers are correctly calibrated by checking the earth gravity on each of the X, Y and Z axis. Gyro can be check for function with the 2 360° rotation. Compass is checked by the 2 rotations and using the MagDataPlayer when zoom in the plot portion when altitude is at 30 meters. Hope it helps. [/QUOTE]
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Disgusted by DJI customer care behavior, need technical help...