Andy Post
lvl.2
Flight distance : 1842283 ft
United States
Offline
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OK..new theory, so stick with me here. All of DJI's vehicles use fixed or retractable gear. Our vehicle is on a Movi Gimbal. When using the movi, you have to have the gimbal in KILL mode while on the ground, or the gimbal will start to spin the UAV around faster and faster. What I think is going on, is that the UAV is free to rotate in the wind, and when it does so, the Flight controller just gets confused because it has no signals that justifies the motion. Then it thinks it's got an IMU or compass error and throws off the critical error warning.
We saw this symptoms of this today in yet another attempt to repeat the error. So this is what happens.
>Booth the vehicle
>Wait for satellite lock
>Calibrate the compass
>Put it back on the Movi
>Now...wait a second, like you'd be walking away from the thing to arm from a safe distance (IE...not standing right over the props)
IF when you turn your back, the breeze is blowing, and the vehicle rotates SLOWLY in either direction, we get the solid red critical error and can not arm the motors.
IF it STOPS turning in the wind, it goes back to blinking and we can arm.
If it rotates at a decent clip, then we are also good to go.
It's just that slow rotation that freaks the thing out.
So if there is any wind that will make the thing want to rotate, it's make it a LOT harder to take off. Maybe there's a Movi update that fixes the spinning UAV thing? |
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