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Spark IMU Calibration failed, need help
11836 31 2017-8-22
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Air_Owen 10
lvl.3
United States
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system overal status keep reminding me that i need my IMU calibration , and accelerometer failed also sensor bias too large. havent crashed, just want to update this morning. When i try to calibrate IMU, An error message came : IMU 1: Calibration failed, automatic orientation error ( error code -50)

Dont know what to do, need help , thank!
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2017-8-22
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STech - Hathder
Second Officer
Flight distance : 403176 ft
Brazil
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Please try to follow exactly what this videos shows, right steps to IMU Calibration:



I hope this help you and you problem are not hardware related.
2017-8-22
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Air_Owen 10
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STech - Hathder Posted at 2017-8-22 09:05
Please try to follow exactly what this videos shows, right steps to IMU Calibration:

https://www.youtube.com/watch?v=wYCK6HXwLTs

thanks a lot! i did it, but it failed in step 1, like the error message screenshot i had in this post. dont know why, thanks
2017-8-22
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DJI Thor
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Flight distance : 13602 ft
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Hi Owen, if the error code is -50, please send the drone back for repair and we will help to do an overall check for the drone. Please fill in some info on our online repair link of our official web and then send it back. Here is the link: https://repair.dji.com/en/SelfRepair/Area
We will do our best to help this out. Thank you.
2017-8-24
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fansa7dc5944
Second Officer
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Another new firmware related.
2017-8-24
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QuanthonyTrang
First Officer
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Air_Owen 10 Posted at 2017-8-22 09:06
thanks a lot! i did it, but it failed in step 1, like the error message screenshot i had in this post. dont know why, thanks

PM me before sending it back.
This has happened to me and i have resolved it.
2017-8-24
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JoeCec
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https://www.youtube.com/edit?o=U&video_id=kfxtxKd69f4
2017-8-28
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joeboomer
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QuanthonyTrang Posted at 2017-8-24 17:54
PM me before sending it back.
This has happened to me and i have resolved it.

I have the same IMU issue.  Step 1 fails.  Says something like "IMU 1: Calibration Failed.  Sample Timeout.  (Error Code -27)  IMU 2: Calibrated".  I only flew the drone once, updated the firmware and now it's a brick.  Planning on sending it back, unless you have any suggestions.

Thank you
2017-8-28
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LeeWireless
Second Officer
United States
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QuanthonyTrang Posted at 2017-8-24 17:54
PM me before sending it back.
This has happened to me and i have resolved it.

What was your resolution?
2017-8-28
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QuanthonyTrang
First Officer
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LeeWireless Posted at 2017-8-28 17:11
What was your resolution?

I have had the same issues. I was re-calibrating mine to the correct climate to prevent long IMU warm up times. Doesn't matter how many times i tried via the GO app, the craft would never calibrate. I cooled the craft, made sure the surface is leveled etc (been doing this for years) and it still failed.

The fix:
The DJI assistant 2 has 'advance' menus. One of them is the IMU advanced calibration.
The difference with this method of calibration is that it doesn't display the orientation of the craft that you need to rotate on each axis. The IMU calibration would calibrate to 94% and stop. You then guess the orientation and wait for the green 'ok' flashes. Each rotation is 1%. Once your hit 100%, the calibration is complete.

I didn't want to mention it here because DJI will frown on it.
2017-8-28
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DJI Elektra
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Hong Kong
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joeboomer Posted at 2017-8-28 16:28
I have the same IMU issue.  Step 1 fails.  Says something like "IMU 1: Calibration Failed.  Sample Timeout.  (Error Code -27)  IMU 2: Calibrated".  I only flew the drone once, updated the firmware and now it's a brick.  Planning on sending it back, unless you have any suggestions.

Thank you

Did your drone have a crash before? Please change a place and calibrate again. If it fails again, I would recommend you contact the support for help. Thanks.  
2017-8-28
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QuanthonyTrang
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DJI Elektra Posted at 2017-8-28 19:04
Did your drone have a crash before? Please change a place and calibrate again. If it fails again, I would recommend you contact the support for help. Thanks.

I think you are confusing yourself with the compass calibration. Changing place does not affect the IMU. IMU just needs a stable leveled surface and the aircraft/drone isn't hot.
2017-8-28
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DJI Elektra
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China
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QuanthonyTrang Posted at 2017-8-28 22:36
I think you are confusing yourself with the compass calibration. Changing place does not affect the IMU. IMU just needs a stable leveled surface and the aircraft/drone isn't hot.

Sorry for the misunderstanding. For better calibrate IMU, I would recommend you put in a flat and let the drone cool down before second calibration.
2017-8-28
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joeboomer
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United States
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DJI Elektra Posted at 2017-8-28 23:08
Sorry for the misunderstanding. For better calibrate IMU, I would recommend you put in a flat and let the drone cool down before second calibration.

I let it sit for a day and tried it again with the same result.  I sent it back to DJI yesterday.  I'll let you know what happens.
2017-8-30
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fans66ab0edb
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open the spark and remove the gimbal, an im in a base that holds the gimbal, hit with a search with rubber cable on top of the IMU, it has locked the accelerometer so do not calibrate, beating 3 or 4 times you will be able to unlock the accelerometer! E-mail to contact xcopterbrasil@gmail.com
2018-1-24
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FelBRax
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QuanthonyTrang Posted at 2017-8-28 18:31
I have had the same issues. I was re-calibrating mine to the correct climate to prevent long IMU warm up times. Doesn't matter how many times i tried via the GO app, the craft would never calibrate. I cooled the craft, made sure the surface is leveled etc (been doing this for years) and it still failed.

The fix:

YOU ARE MY HERO, LOL

Thank you, Thank you!!!
You saved my spark from this "IMU Calibration Failed" - Endeless Loop

Can't tell all the details on the forum but this advanced IMU calibration worked!

Anyway ... it was kinda hard to calibrate the "Front pointed UP" position, with the USB attached to the drone, but after making the advanced calibration I tried calibrating again, this time in the app and worked like a charm.
It looked like some sort of internal drone software error, because all IMU data was displaying correctly in the Attitude Indicator, but when I was trying to calibrate, at the end of the calibration steps it was not "saving the data" (maybe, idk)

By the way ... this is the attitude indicator:
hud.PNG

Thank you again QuanthonyTrang
2018-1-30
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Raptor_15
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Sri Lanka
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QuanthonyTrang Posted at 2017-8-28 18:31
I have had the same issues. I was re-calibrating mine to the correct climate to prevent long IMU warm up times. Doesn't matter how many times i tried via the GO app, the craft would never calibrate. I cooled the craft, made sure the surface is leveled etc (been doing this for years) and it still failed.

The fix:

Please can you explain how to fix this with the DJI assistant 2. I am unable to find the advanced IMU function
2018-2-14
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Raptor_15
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Sri Lanka
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FelBRax Posted at 2018-1-30 20:08
YOU ARE MY HERO, LOL

Thank you, Thank you!!!

Please tell me how you did it? sabry@platinumautospa.lk
2018-2-14
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Sparky_17
Captain
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Canada
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Had issues with calibration once, in July 2017.  Moved to a new location and tried again and I worked.  I assumed the first surface wasn't 100% level.  Haven't had any issues since then.  Good to know about the Advance IMU calibration within DJI Assistance app.
2018-2-14
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Raptor_15
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Sparky_17 Posted at 2018-2-14 05:38
Had issues with calibration once, in July 2017.  Moved to a new location and tried again and I worked.  I assumed the first surface wasn't 100% level.  Haven't had any issues since then.  Good to know about the Advance IMU calibration within DJI Assistance app.

I have tried several locations with no luck. I use a level gauge to make sure the surface is flat to. I am unable to locate the advanced IMU calibration in the DJI assistant 2 software
2018-2-16
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Sparky_17
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Raptor_15 Posted at 2018-2-16 19:49
I have tried several locations with no luck. I use a level gauge to make sure the surface is flat to. I am unable to locate the advanced IMU calibration in the DJI assistant 2 software

Have you tried to calibrate the IMU and Compass without the DJI Assistance software.  I gave up on the software a day after I got my spark.  Everything I do, I do it through the Go4 app and have not had any issues since.
2018-2-19
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fans11dd4c67
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Canada
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Sparky_17 Posted at 2018-2-19 05:05
Have you tried to calibrate the IMU and Compass without the DJI Assistance software.  I gave up on the software a day after I got my spark.  Everything I do, I do it through the Go4 app and have not had any issues since.

My Fitbit Ionic interfered with IMU calibration. Could not get past “Start” ! Shut off Bluetooth on iPhone and put Ionic in another room. Calibration a breeze after that.
2018-3-13
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fansaf141652
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joeboomer Posted at 2017-8-30 13:43
I let it sit for a day and tried it again with the same result.  I sent it back to DJI yesterday.  I'll let you know what happens.

I need some help with my spark. I have take my spark out to fly after several day .  I kept getting imu error 50. I am not able to resolve the issue.  
2018-5-12
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3D Drones
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QuanthonyTrang Posted at 2017-8-28 18:31
I have had the same issues. I was re-calibrating mine to the correct climate to prevent long IMU warm up times. Doesn't matter how many times i tried via the GO app, the craft would never calibrate. I cooled the craft, made sure the surface is leveled etc (been doing this for years) and it still failed.

The fix:

Hello, I am using 3 different versions of the assistant and I still can not find the advanced option that you say.
Could you tell me where this or what is the specific version?
Thank you!
1-18 05:00
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gmozo
Second Officer
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i understand the situation that you are having, i suggest that you have to get it fix or look upon youtube trust me i had this problem before.
1-19 19:33
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Tyredecals.com
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3D Drones Posted at 1-18 05:00
Hello, I am using 3 different versions of the assistant and I still can not find the advanced option that you say.
Could you tell me where this or what is the specific version?
Thank you!

Try this version
https://drive.google.com/file/d/ ... EV/view?usp=sharing
And then you need to enable debug menu (lookup on youtube).
This will then give you access to advance menus.
1-20 07:30
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zeshokowhite
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France
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i'm having the same issue.

did not find the advanced settings in the program

i've send a report, nothing in return from DJI, my drone is now just a niece piece of technology on my desk, unable to get through the IMU calibration
5-11 05:08
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Jakab Gipsz
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Hungary
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zeshokowhite Posted at 5-11 05:08
i'm having the same issue.

did not find the advanced settings in the program

5-17 12:22
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Mel_du_Cluzeau
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Mozambique
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FelBRax Posted at 2018-1-30 20:08
YOU ARE MY HERO, LOL

Thank you, Thank you!!!

Hi, which version of Assistant 2 did you use? Because the one I downloaded from the DJI website doesn't offer the option for 'calibration' when it recognizes my Spark? (though it does for other products like the Mavic Pro) Thanks in advance !
7-31 10:03
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xoxo35
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START CALIBRATION IN HORIZONTAL LOCATION NOT FLAT IF THE TEMPERATURE FAILS, GET STARTED AFTER 10 MINUTES IN THE REFRIGERATOR
9-23 06:47
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Igor14
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Serbia
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As @xoxo35 said, you just need to set drone on its side when start IMU calibration, and wait for next step. So don't follow instruction to put drone flat on its legs, insetad put it on a side. That solved my problem with IMU Calibration error 50.
10-18 07:23
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djiuser_XHP9mbDEemfF
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United States
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I found that this solves the error. I actually had to activate the debug mode on the pc application. It baffles me how engineers at dji didn't figure this out. Incredible.
11-10 10:16
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