Hi all,
2 days ago I experienced a strange behaviour on my quad running version 3.2.1.
Right after takeoff everything seemed to be ok regarding stability but after approximately 20 seconds the copter started drifting to the left in stabilize mode. I tried to compensate by moving the roll stick completely to the right. But it seemed to me as if the roll angle was increasing more and more. So I lowered the throttle stick but due to the high drift velocity it resulted in a crash.
Back on my computer I tried analysing the logs.
Here is what I found out:
In the log file the roll angle was increasing (> 0 deg) which to my understanding means roll to the right. But visually and accordingly to the GPS positions the quad moved to the left and referring to the telemetry a roll to the left means negative roll angles. Can this be true?
Also in the params I saw that arming check is set to -5 (skip compass) which in my opinion is not the cause of the strong drift. What do you think?
Furthermore the INS_PRODUCT_ID is 0. The INS_PRODUCT_ID of another quad I'm owning has id 5. Both are original products from 3DR. How come? Can this be the reason of the drift?
I attached the log file which is very small of size. Hopefully one of you guys can have a look at it. Maybe I overlooked something. I would really know the cause of the strong drift before I start repairing.
Chris
Replies
In my case it appeared to be a broken Pixhawk module.
After powering the module one could see sudden changes on roll and pitch angle. I think something similar happened during the flight. So to me it seemed that the IMU was broken somehow.
After replacing the pixhawk with a new one everything worked out.
It's looks as a mechanical failure, motor or esc
Hi you found a solution for this? I have the same problem..
Thanks in advance