I have had exactly 0 successful flights with Pixhawk so far. This quad flew fine on APM other than the fact that my clone APM had a bad barometer, which is why I switched to pixhawk.
My quad is about 1.5kg AUW, SimonK 30A esc's with Afro NFET V2014-01-19 firmware, Tiger MT2216-9 1100kv motors, Arducopter 3.1.2.
First crash was on a throttle punch, motor 1 just stopped and the quad crashed. Troubleshot it to an ESC sync issue (which didn't exist on APM...). To fix it I added the ground wire to the ESC servo connector. Tried autotune again, and although it didn't crash arm 1 would dip during the autotune. So then I updated the ESC firmware to the latest. Also soldered the motors direct to the ESC. Seems to have resolved the issue, at least when the quad is strapped down.
Went to try today. Before attempting autotune I did a couple of mild throttle punches to see if I had any issues, and sure enough the quad flipped and crashed inverted.
Now, even with default PID's that don't fly good, doing a mild throttle punch shouldn't result in the quad flipping over and crashing correct? I'm scared to get to autotune altitude knowing the quad has this problem, so far my crashes have only resulted in minor damage due to the low altitude.
I've attached the log and would be eternally grateful if someone can assist me in getting this $700 paperweight flying properly. I'm especially confused why I didn't have these problems with APM but do now with the Pixhawk.