Quad X, all up weight 4kg, apm 2.6 with ac3.1.2, external compass, MN3110 470kv, T motor esc 30 amp, 17*5.8 t motor carbon prop, 4s2p 5000mah.
i had a crash today, it sounds that motor 4 stopped, i was tunning my quad.
tunning : fly with radio, land, change pid on my computer with radio link, write, then fly again to test and do the loop again.
I unscrew everything and follow each wire from motor to apm and everything was good.
is the autotune issue with low kv a bug in the code or a thing that happens even in normal stabilize flights?
i attached the log if someone could give me clue.
what does mean : error check 1?