I tried to do an Autotune on my Arris m900 using a Pixhawk 6c. It had been flying pretty well before I tried the autotune so I thought a autotune would help it fly even better. I setup Alt hold on a flight mode switch and then setup channel 10 for Autotune. I took off, put it in a moderate hover, put it in Alt hold, and then tried the autotune switch. Things went really wonky really fast. I know it’s supposed to tip side to side but this was gyrating badly. I thought it was going to crash. I was able to disarm it when it was about a foot off the ground. Any ideas as to what would cause it to do that?
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