Aardvark Posted at 2017-8-21 15:44
Unfortunately they still haven't got the P4 manual 100% in that respect. P56 states what most now take as common practice, i.e. only calibrate when advised by system. But there is a note (near top of P67) that instructs calibrating compass before each flight. And that was released about five weeks ago. Aardvark Another question for you, you posted, on another thread, which I cannot find now, about there being 5 items that need calibrating. I copied it for my notes, and edited it a bit for my use, here it is: 1. Compass: Page 57-58 // (in an open area not near or over steel reinforced concrete), away from ferrous materials or electromagnetic interference. Get one good calibration, and that should be all that is needed until informed by system or erratic flying that needs investigation. Note that any ferrous metals very close to legs (steel frame in desk, cutlery in kitchen drawer, windowsill strengthening etc.) will generate a 'compass error’; this does not mean compass needs recalibration. Just move the aircraft away from source of interference.
2. Sensors: pg 28 // (Use DJI Assistant 2, latest version), usually done just after an update on Assistant 2.
3. IMU: (level surface, make sure it had time to cool down if it's been powered up, say half an hour at lowest ambient temperature, a cool evening or air conditioned room below <50ºF helps). Using the newer '3D' IMU calibration routine, my last two IMU calibrations have been done at about 68ºF ambient air temperature. The subsequent IMU warm up time when aircraft is first powered up and initializing does not seem to have been adversely affected, and warm up time is a few seconds at most. ???
4. Gimbal: (just after IMU) ???
5. Remote Controller - Control Sticks: (Aircraft Off) GO 4 App?
Again, it was edited, so my question about this is...where in the manual (there is none that I can find P4P v1.2) does it explain or describe how you perform the IMU, Gimbal, and RC calibrations? I'm guessing that the RC is done by the App, but is there something that explains the process? However, I can find nothing anywhere that speaks to explain the IMU & Gimbal calibrations. Anything you can provide on these areas will be greatly appreciated.
Thanks!
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