I've done a IMU calibration with only .0005 degrees on being perfect on the horizontal. Also calibrated compass. I calibrate the gimbal several times,but it never goes above 66%, but.says the calibration is complete. My question is how do you know if the gimbal is 100% complete if it only shows 66%? Maybe this is the reason for the tilted horizon because the gimbal calibration isn't complete, but the dji go app says it is. I've calibrated everything so many times, but the tilted horizon is still tilted. Hopefully someone will have a permanent fix....

I know several forum members here, have successfully fixed a crooked horizon, with their Phantom 3 gimbal, by doing a chilled drone IMU calibration, followed by the gimbal calibration.

I'm unsure, if this procedure, would also fix the Phantom 4 crooked horizon issue as well?  You could try it and see... ;-)


RedHotPoker

RedHotPoker Posted at 2017-2-1 02:10
I know several forum members here, have successfully fixed a crooked horizon, with their Phantom 3 gimbal, by doing a chilled drone IMU calibration, followed by the gimbal calibration.

I'm unsure, if this procedure, would also fix the Phantom 4 crooked horizon issue as well?  You could try it and see... ;-)

I've already  done that so many times , but it didn't  help. I've  calibrated everything so many times it not funny anymore . Thanks  for your help. I think it is in the firmware. I've  even done a firmware update several times that didn't  help either. Have you seen the gimble calibration  that I'm  talking about?

fans5916e3a5 Posted at 2017-2-1 02:26
I've already  done that so many times , but it didn't  help. I've  calibrated everything so many times it not funny anymore . Thanks  for your help. I think it is in the firmware. I've  even done a firmware update several times that didn't  help either. Have you seen the gimble calibration  that I'm  talking about?

Hi dose the calibration go from 66% to complete? how long is this period between 66% to complete?
If the horizon is still tilted you will be right in saying that it may be a FW issue depending how bad the tilt is
Have you tryed to roll back FW to see if it helps?

Nigelbrinkmann Posted at 2017-2-1 02:36
Hi dose the calibration go from 66% to complete? how long is this period between 66% to complete?
If the horizon is still tilted you will be right in saying that it may be a FW issue depending how bad the tilt is
Have you tryed to roll back FW to see if it helps?

About 2 seconds.

Nigelbrinkmann Posted at 2017-2-1 02:36
Hi dose the calibration go from 66% to complete? how long is this period between 66% to complete?
If the horizon is still tilted you will be right in saying that it may be a FW issue depending how bad the tilt is
Have you tryed to roll back FW to see if it helps?

Yes I've  done a rollback  with the djigo app,didn't  help. The djigo 4 does the same thing  I  think when dji does a firmware upgrade that issue isn't  address. So when dji upgrades the issue is  still there because  that part of the firmware wasn't  change  so it just gets  passed along on the next update. Thanks for your help.

fans5916e3a5 Posted at 2017-2-1 02:26
I've already  done that so many times , but it didn't  help. I've  calibrated everything so many times it not funny anymore . Thanks  for your help. I think it is in the firmware. I've  even done a firmware update several times that didn't  help either. Have you seen the gimble calibration  that I'm  talking about?

So You have chilled the drone down good in the fridge, or in front of an air conditioner before beginning the IMU calibration?
Ok, Not sure what else to recommend then...


RedHotPoker

fans5916e3a5 Posted at 2017-2-1 02:49
Yes I've  done a rollback  with the djigo app,didn't  help. The djigo 4 does the same thing  I  think when dji does a firmware upgrade that issue isn't  address. So when dji upgrades the issue is  still there because  that part of the firmware wasn't  change  so it just gets  passed along on the next update. Thanks for your help.

How bad is the horizon tilt? could you post a pic?

I had the same problem with tilted horizon. After imu and gimbal calibration didn't fix the problem I used the gimbal roll option in camera to straighten horizon.

The horizon 'tilt' can be adjusted in flight using the RC 'shortcut' of holding C2 button operated, and while C2 operated adjust tilt using right hand wheel on controller. There is also a grid pattern appears on screen to assist.

Aardvark Posted at 2017-2-1 06:07
The horizon 'tilt' can be adjusted in flight using the RC 'shortcut' of holding C2 button operated, and while C2 operated adjust tilt using right hand wheel on controller. There is also a grid pattern appears on screen to assist.

Thanks for your response.  I know how to do all that. The issue needs to fixed by dji.