Hi all -
I'm having a little trouble determining exactly what happened here. I was doing some initial backyard low-altitude hover testing of my new Y6B. This is a large 750 size sky-hero frame with 6S batts.
Around log line 113630, one arm dropped, and I heard a motor stuttering (the sound I would hear if the PWM went too low for the channel).
Fortunately just prop damage because of low altitude. I'm trying to figure out if this was an ESC/motor sync failure, or the PWM actually went too low because of a parameter/config issue, and if so, why?
The log sort of suggests that the output PWM on a channel 1 dropped to it's baseline (1206) *before* the craft started pitching, which, to me, does not suggest an ESC issue...
Thanks
Replies
I don't know if this was the cause of your crash, but there was a GPS fail. The interesting part is INAVErr jumped way up during that same period. Although in Stab mode, if Super Simple mode was on, it uses GPS. I didn't look at much else, but this jumped out.
Interesting.. I didn't notice the GPS glitch. It was during a time when I was in loiter, quite a while before the crash. It was basically one record with HDOP=99.99 (the lat/long/nsats were all normal)
I've sort of come to the conclusion that the minimum PWM was too low for my motors/escs (They are rather large motors spinning 16" props) I had MOT_SPIN_ARMED set to 130, and sometimes one of the motors wouldn't kick on when arming, which honestly I didn't consider a problem. 130 is also the default for THR_MIN. I bumped both up to 150, and tested through another battery without incident.
Thanks