GerdS
lvl.4
Flight distance : 4303379 ft
Germany
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I want to ask you to do a little test with yours to check if this problem is affecting all Mavic Minis more or less:
1. Go to a flat location with at least 200m free space in one direction.
2. Take off in P mode and go to a preferred altitude, keep the altitude as shown within the Fly app in mind. Don't touch the throttle stick anymore from now on.
3. Fly straight away approx. 200m with full speed, then slow down for hovering.
4. Read the altitude there, then wait about 10s and check for uncommanded altitude loss.
5. Turn 180° and fly back to your home point with full speed.
6. When back, check the altitude as displayed by the Fly app. Is it still the same as was at the beginning, or how far is it off?
7. Switch to Sports mode and repeat from step 2.
Please let me know your results.
For my MM difference in altitude was up to 10m in sports mode.
I repeated this test today, although quite gusty, with my old Mavic Pro, both in P and S mode. What shall I say? Altitude was rock solid and was exact same between start and end of test, if there was any derivation it was less than 1m. Same I would expect from Mavic Mini.
The Mavic FCs execute many control loops and one of them is responsible for continuously adjusting altitude. Something goes very wrong there in MM firmware, but for some MMs the problem does not show up that seriously, why ever...
I might now contact the DJI service for exchanging my MM and with some luck, the replacement drone might not show this bug so drastically as my current one. But on the long term this would be no solution as long as the firmware bug causing this issue remains unfixed. There is no guarantee that this bug will not show up again in future, caused by aging parts.
The problem is now finding a really competent contact person at DJI who is able to adress this problem to the responsible developer for finally fixing.
Any help or contact info is welcome. |
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