HELP!!!
I have a new quad build as follows:
A TBS Discovery knock off frame, 2212 100KV motors, 30A generic ESC, Pixhawk 2.4.8, Ublox M7 GPS/Compass, Arducopter 3.6.4, Frsky X4R-SB receiver.
The first flight with this setup after approximately 90seconds in the air the copter suddenly started rotating and descending and it appeared that I had no control. Fortunately there was no damage. The best I could tell from logs was that the compasses were not properly calibrated.
I went through all of the setup steps again and, again, to the best of my knowledge, everything was calibrated correctly.
The next attempt also resulted in a crash. This time after about 60 to 90 seconds at about 15 feet AGL it started a fair pitch to the right and descended to the ground. Again no significant damage.
I cannot find the problem. I would appreciate if someone could take a look at the attached the log file.
I don’t see 60 seconds of flight in that log. I see 3 seconds of motors spinning on the ground followed by 4 seconds of erratic flight.
I don’t think 2212 100KV motors are practical for flying drones. Double check the information you gave for your motors. Propeller data is equally important.
Since 2 motors immediately spin up considerably faster than the other 2 the moment you give some throttle before takeoff, try recalibrating accelerometer unless you’re taking off on a slope.
I would also double check motor locations and spin directions. It appears there’s a mismatch between where the computer thinks your motors are and spin directions and where they actually are.
If I were you, I’d flash to 3.6.7 and begin the firmware setup from scratch using the wizard after fixing the above mechanical problem.
Thanks, that is it. On the bench, running at mid throttle in stabilize mode, after 2 to 3 minutes motor 4 spins down to an “idle” speed and then goes dead. I swapped motors and had the same issue. So I’m guessing it’s a bad ESC.