My arducopter has fallen out of the sky a couple of times today. I tought it was bad connections, so i replaced them.
But when i started testing again i found that if i move the trottle stick fast it disarms. The arm-led stops blinking and the engines stop. Any one know what might be wrong???????
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"It's not a bug, it's a feature".
Indeed in the NG code there is this line in ArduUser.h:
#define SAFETY_MAX_THROTTLE_INCREASE 100 // how much of jump in throttle (within a single cycle, 5ms) will cause motors to disarm
So if your Throttle increase more than 100 (I think it is about 1/10th of the full range) in less than 5ms, your motors will disarm. I'm not sure why this was implemented, but if it's disturbing you, you should increase SAFETY_MAX_THROTTLE_INCREASE in the code and reload it into your board.
fast in which direction?
did you accidently yaw to the left and pulled throttle stick down? then it disarms