Tarot 650 pixhawk positiionHold went crazy

[tom tarot 650]

Hello guys
I really need your help to understand what happened.
I have a tarot 650 pixhawk, it was flying ok during last days stabilize and position on hold, I also tested RTL, all was working,
I only today added battery monitoring feature and I was testing auto trim in the garage,
after that I was flying in the backyard few time , was ok
last flight went bad, I took off, went to position on hol
and
- tarot went by itself ( no wind) to the right aggressive
I input to the left to stop him, and them he went back, hit my house wall, after that went in 180 degree opposite direction, I was trying to take him back and land him, he didnt listen, I put landing mode, he didn't land, so I went to stabilze mode and released the power to drop him,.
the dame isnt bad, just landing gear,
but WHAT HAPPENED?
here is the video how it went, and I can also provide the logs ,
please help

p.s
I dont know if I pulled right log, ( not clue about it) but it shows GPS ERR,-2 and 0. so something with gps?
tom

 

[Jackson]

I was testing auto trim in the garage

Sure like the obvious culprit. Did you allow it to complete?

 

[tom tarot 650]

Hi
The video you showed, its an Autotune, and I was doing Auto Trim,
Autotrim looks like that, you hoover or like 25 seconds, in stabilize mode, land, and wait a while co pixhawk can save trims,

anyway, when you look at my graphs, it shows ERR: GPS-2 and ERR:GPS-0
I am not experienced with those flight data logs, but it shows GPS error, so could GPS made an such a big error and push a pixhawk in such a wrong and aggressive directions?
pixhaw is original from US< I didn't buy it from China, so I dont think that pixhawk made an error.
hmm

 

[ringolong]

Did you ever get this sorted out? I have been thinking about getting a pixhawk, but not sure.

 

[tom tarot 650]

Yes,
It was a motor issue, I had to brand new motors, out of the box, and they were messed up, I put the old motor, and it works, fine,
Pixhawk is ok, it is a great flight controller, kinda complicated, it has a lot of features, but worth it.