Kyokushin
Captain
Flight distance : 296381 ft
Poland
Offline
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I think its not a problem of spark itself, but a magnetic field. It may change a bit. So if you calibrated compass few days ago and you are sure its correct, and in the same place you are getting a compass error, then something is wrong with that place.
And IF you recalibrate compass, then you will get wrong calibrated compass and after take off and fly few meters you will get compass error and fly away, and it may never recover gps.
It will recover GPS only in a case when it will be in magnetic interferences-free location, so if you calibrated it in interfered location, then any other location will be considered as not good by the spark computer.
I had today a compass error before start, and i calibrated it few days ago, and flied every day. I turned off the spark, and moved to a different place, a 10 meters i think, and then compass was fine.
I was unable to start a spark from that specific place, but i was able yesterday.
Its normal - there may be a magnetic interferences, magnetic storms and our magnetosphere may not always remove it from space, and in that case our drones can may simply switch to atti.
That may happen, thats why by the rules in most countries they should be used in VLOS and uav operator should be prepared to fly in no stabilisation mode.
I saw parameters in flight controller about compass sensivity and a threshold when compass readings are considered as wrong and when atti mode will appear. Maybe that values need to be adjusted a bit, maybe they are too sensitive.
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