- Joined
- Sep 2, 2016
- Messages
- 559
- Reaction score
- 395
After recently posting a pair of videos to demonstrate the virtues of Litchi ( Example of a Litchi mission for those on the fence... ), it became fairly apparent to me that I was one of the lucky ones with a tilted horizon issue on my P4... So, I began to dig for info, here, YouTube, and everywhere else.
Today, I downgraded the firmware on both my remote and copter, followed by reloading the latest on both. It went very smoothly, and this is one of the ways that some folks have rectified this issue, at least for awhile anyway, until it comes back again. One post that I read even stated that this is what DJI will have you do in some cases during trouble shooting and prior to finalizing an RMA.
I then set up to perform an IMU calibration and gimbal calibration, but prior to doing so, I placed a carpenter's level on the table that I have been performing these calibrations on. I had prior checked this surface to be level with my iPhone - like many no doubt do - and guess what...it was off on both the X and Y axes by at least 2 degrees. I took care of this and then performed the calibrations smoothly.
It was not a very good weather day here where I am, so sadly, I have yet to fly the copter, but the real point that I wanted to make is that using a carpenter's level to verify that your calibration area is level is a must. 2 degrees - in my case - is not much, but by the appearance of my videos, my horizon was off by 2 - 3 degrees. I think that the iPhone - and other smart phones - is just not long enough to give an accurate reading of true level, and I'm glad that I checked this as I did.
Today, I downgraded the firmware on both my remote and copter, followed by reloading the latest on both. It went very smoothly, and this is one of the ways that some folks have rectified this issue, at least for awhile anyway, until it comes back again. One post that I read even stated that this is what DJI will have you do in some cases during trouble shooting and prior to finalizing an RMA.
I then set up to perform an IMU calibration and gimbal calibration, but prior to doing so, I placed a carpenter's level on the table that I have been performing these calibrations on. I had prior checked this surface to be level with my iPhone - like many no doubt do - and guess what...it was off on both the X and Y axes by at least 2 degrees. I took care of this and then performed the calibrations smoothly.
It was not a very good weather day here where I am, so sadly, I have yet to fly the copter, but the real point that I wanted to make is that using a carpenter's level to verify that your calibration area is level is a must. 2 degrees - in my case - is not much, but by the appearance of my videos, my horizon was off by 2 - 3 degrees. I think that the iPhone - and other smart phones - is just not long enough to give an accurate reading of true level, and I'm glad that I checked this as I did.