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The New IMU Calibration Process for the A3
5619 31 2016-10-28
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DJI-Jamie
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When you update your stand alone A3 to v1.5, you will notice that there is a change in the IMU calibration process for better accuracy. Similar to the DJI Mavic, you will need to position your aircraft in multiple angles in order to complete the calibration process:
A3 imu cali.JPG

When one position is complete, the corresponding picture will have a green check mark to let you know to reposition the craft. You will receive a larger "Complete" notification when the IMU calibration process is complete.

Please be advised that the upside down position is completely optional, especially if you're using a larger craft. Performing only the first 5 positions will still guarantee precision accuracy to the IMU.
2016-10-28
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iSkyUnmannedSys
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Hi Jamie. I've only conducted the calibration process via the app, bit hard doing it next to my PC via a USB lead. In the app it only shows to rotate the airframe nose up, nose down and then vertical on the left and right axis? Why is the Assistant process have extra steps?
2016-10-29
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ckk.post
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Now I have tried and calibrate imu
I never get to the point where I have to turn it upside down before it says it's finished ?????
2016-11-1
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iSkyUnmannedSys
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ckk.post Posted at 2016-11-1 08:29
Now I have tried and calibrate imu
I never get to the point where I have to turn it upside down befo ...

This is what I was asking also. The calibration process is different when using the app. I've flown it a few times using the app calibration and my S900 flies fine.
2016-11-1
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ckk.post
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iSkyUnmannedSys Posted at 2016-11-1 09:44
This is what I was asking also. The calibration process is different when using the app. I've flow ...

I do it via computer
since I use Futaba but as written when I make imu calibrate
then I never come to the point where I have to turn upside down
before I say is finished ???
2016-11-1
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ckk.post
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ckk.post Posted at 2016-11-1 09:29
Now I have tried and calibrate imu
I never get to the point where I have to turn it upside down befo ...

There is no that  can answer as an important issue DJI ?
2016-11-1
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DJI-Jamie
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I'm inquiring with our R&D team with this and I should have further information for you shortly.

From what I've found through some testing is that if you place the unit upside down earlier on, then it will give you a green check mark and still allow you to perform the other five positions before giving you the "complete" option. From what I've seen, there does not seem to be any difference in the accuracy of the IMU readings whether or not you perform the upside down position. Since the Go app does not require for the unit to be upside down, this does seem to be a more optional position when using the Assistant 2 software. I'm checking with R&D to verify the latter.

If you are a completionist, sort of speak, I would recommend placing the unit upside down at any point during positions 1-5. As I mentioned in another thread, you are able to perform these positions in an indiscriminate order and still receive a successful calibration. Either way, as long as you get a "complete" notification and the IMU data is within its appropriate standards, then you would be fine.
2016-11-1
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ckk.post
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DJI-Jamie Posted at 2016-11-1 19:46
I'm inquiring with our R&D team with this and I should have further information for you shortly.

Fr ...

ok I'm waiting for a response before i fly
it flies badly after upgrade
and now it is unstable and also goes up and down is not standing still in the air
before the upgrade it was  fine only brake that was too hard ?
Any idea what I can do to  make it more wind stable
2016-11-1
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DJI-Jamie
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ckk.post Posted at 2016-11-2 02:55
ok I'm waiting for a response before i fly
it flies badly after upgrade
and now it is unstable an ...


Have you tried doing a factory reset after performing the firmware update?
2016-11-1
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ckk.post
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DJI-Jamie Posted at 2016-11-1 21:01
Have you tried doing a factory reset after performing the firmware update?

I'm not really right here factory reset ?
2016-11-1
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DJI-Jamie
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ckk.post Posted at 2016-11-2 04:16
I'm not really right here factory reset ?

Factory reset would be the "Restore" button that is located on the Dashboard page.
2016-11-1
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ckk.post
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DJI-Jamie Posted at 2016-11-1 23:15
Factory reset would be the "Restore" button that is located on the Dashboard page.

and what would it help other than that I have to start all over ?
2016-11-1
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ckk.post
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DJI-Jamie Posted at 2016-11-1 23:15
Factory reset would be the "Restore" button that is located on the Dashboard page.

Now I have tried and start over
appears and be somewhat better
seems it is not quite as wind stable
do you have an idea of what I might adjust on to and make it more wind stable
because it works differently than a2 I am unsure what I may adjust on
2016-11-2
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DJI-Jamie
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ckk.post Posted at 2016-11-2 18:30
Now I have tried and start over
appears and be somewhat better
seems it is not quite as wind stabl ...

It normally involves adjusting the gains. Just to make sure I'm on the same page, is it still moving up and down or is it moving differently?
2016-11-2
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DJI-Jamie
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Just to let everyone know, I did confirm that the upside down position is completely optional. Post #1 has been edited to reflect as such.
2016-11-2
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ckk.post
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DJI-Jamie Posted at 2016-11-2 17:44
It normally involves adjusting the gains. Just to make sure I'm on the same page, is it still movi ...

There was some wind today and it went a little up and down but of course normal
so I'll have to try this weekend again
2016-11-2
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DJI-Jamie
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ckk.post Posted at 2016-11-3 02:04
There was some wind today and it went a little up and down but of course normal
so I'll have to tr ...

Please let me know how it went, when you have a chance.
2016-11-2
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ckk.post
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DJI-Jamie Posted at 2016-11-2 19:49
Please let me know how it went, when you have a chance.

I will do that
2016-11-2
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ckk.post
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DJI-Jamie Posted at 2016-11-2 19:49
Please let me know how it went, when you have a chance.

Have only had time today
and retest must say it flies well now
also no up and down However, just say the problem of the motors run up to speed just before it stops
still is a problem and something that is also mentioned in other posts
and that is a big problem in my eyes and something that needs to be improved
but now I have to go out and try with camera on also  
thank


2016-12-4
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alikc218
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Hi Jamie

I try IMU calibration, but Assistant 2 freeze.
After new connecnion, never Dashboard page or other page appear, only simbol same "in progress"
I try other computer Win7, Win8 and Win10
How I can physical reset to factory parameters?
Thanks
2017-1-19
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SkySight Aerial
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I find it easier to calibrate the IMU in the Go App as this is more like the previous calibration process with no aircraft acrobatics which is difficult on the larger aircraft.
2017-1-19
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alikc218
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I can't use  Assitent 2, because after connecting, the program is frozen I don't see any pages
2017-1-19
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DJI-Jamie
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alikc218 Posted at 2017-1-19 04:51
I can't use  Assitent 2, because after connecting, the program is frozen I don't see any pages

Just to clarify, which Assistant 2 version are you using? There was a newer one that was just released. In addition, I would recommend giving an IMU calibration via the Go app as SkySight mentioned if you have a large rig. It will make it a little easier to do. Everything else is fine to do via the Assistant.
2017-1-19
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alikc218
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I did the calibration using Go app. Thanks.
I use Assistant 2 v1.0.9 and upgrade A3 to v1.07.0.0.
Assistant 2 "frozen" again before Dashboard
Can I use short-circuit the signal pins of F1/F2 ports for hard reset to factory settings?
2017-1-20
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DJI-Jamie
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alikc218 Posted at 2017-1-20 06:52
I did the calibration using Go app. Thanks.
I use Assistant 2 v1.0.9 and upgrade A3 to v1.07.0.0.
Assistant 2 "frozen" again before Dashboard

I don't believe the F1/F2 pin trick would work with the A3. Could you happen to provide a screenshot of where if happens to freeze?
2017-1-20
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alikc218
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Screen here
https://cloud.mail.ru/public/9cAL/eV5dnBhyG
2017-1-20
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DJI-Jamie
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alikc218 Posted at 2017-1-20 14:39
Screen here
https://cloud.mail.ru/public/9cAL/eV5dnBhyG

I'm sorry if this was missed, but have you already tried reinstalling the latest software, or installing the previous Assistant 2 to see if it responds that way?
2017-1-20
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alikc218
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THANK YOU, JAMIE!!!
I again upgrade Assistant 2 to v1.09-2 and it normal work with my A3 v1.7.0.0
2017-1-21
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DJI-Jamie
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alikc218 Posted at 2017-1-21 08:27
THANK YOU, JAMIE!!!
I again upgrade Assistant 2 to v1.09-2 and it normal work with my A3 v1.7.0.0

Glad to hear it got sorted out, thanks for letting me know.
2017-1-23
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lean
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Hello Jamie I have problem with M600 esc led don't turn on after update to A3 v1.7.0.0.

2017-1-28
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DJI-Jamie
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lean Posted at 2017-1-28 05:34
Hello Jamie I have problem with M600 esc led don't turn on after update to A3 v1.7.0.0.

Is this tied to your other thread?

http://forum.dji.com/thread-82736-1-1.html

If so, I can help you out from there.
2017-1-29
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Clancey
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Hello, I am trying to preform Accurate Polyhedron Calibration to see if I can remove YAW drift, My DJI Assistant 2 Software version is 1.1.6 and My flight controller is An A3 pro running firmware version is V1.7.1.5

Under Tools / topoolgy  I click on the main FC then click on IMU calibration I click Confirm to the Tips, I Click on settings it gives me the option between monohedron Calibration or Polyhedron Calibration, I check the Polyhedron Calibration box, I click on Yes at the bottom right of the DJI assistant 2 software but nothing happens and when I navigate back to the IMU calibration options it reverts back to fast  monohedron Calibration and, I can try and click on calibrate but nothing happens, Only way to do the calibration is within the DJI Go app now.


When will an update be available?

2017-10-13
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