Governability Bad Proble APM 3.1

ArduCopter Copter 3.1
1

Good morning;
I have a really bad problem on my Emax Nighthawk 250;

I describe what happens every time flight: mode : stabilized ; It makes a very stable and slow flight , after a few minutes of flying here that the model becomes ungovernable; as if all of a sudden become the mode ACRO; this is very dangerous because I can not predict when it will happen to me, and especially if I am in stabilized mode must not become acro … please help me guys .

I’m desperate and I can not understand what the cause of it all.
Thank you very very much for your kind attention.

my actual PID:

my PID.png704×366 109 KB

2

You will need to post your data flash log here before anyone can help with more than a guess at what is wrong.

3

I’m sorry;
thank you very much for your disponibility @mboland; is the firt data flash log for me; I’m not sure that these are the correct data; below the log:

Log File C:\Program Files (x86)\Mission Planner\logs\QUADROTOR\1\77 01-01-1970 01-00-00.bin.log

Size (kb) 229.0419921875

No of lines 3777

Duration 0:00:00

Vehicletype ArduCopter

Firmware Version V3.2.1

Firmware Hash 36b405fb

Hardware Type

Free Mem 0

Skipped Lines 0

Test: Autotune = NA -

Test: Balance/Twist = NA -

Test: Brownout = GOOD -

Test: Compass = GOOD - No MAG data, unable to test mag_field interference

Test: Dupe Log Data = GOOD -

Test: Empty = GOOD -

Test: Event/Failsafe = GOOD -

Test: GPS = UNKNOWN - No GPS log data

Test: IMU Mismatch = UNKNOWN - No IMU log data

Test: Parameters = GOOD -

Test: PM = NA -

Test: Pitch/Roll = NA -

Test: Thrust = NA -

Test: VCC = GOOD -

as you can see into the image of the desired Roll and effective Roll: at the end there are crazy parameters, and it was the time when the quad answered as if in ACRO mode; and then they landed.

graph.png1312×282 56.7 KB

Please: for more informations if needed ask to me, I’ll be happy to be precise and to provide all necessary, thank you very much guys.

Thanks thanks thanks

4

Is possible that the problem is not the APM mini? But… For example one ESC?
It is not possible to control the quadcopter if one ESC is crazy; but, is possible that in the first moment of the fly all is perfect and after some minutes… Not the same? I really can’t understand; what do you think? Is possible to verify this option?

Thank you very very much, and sorry for my english x_x