KK 2.1.5 board autoarms and also does not arm sometimes

[BrandonC]

It's really scary sometimes when I plug in the battery to adjust some settings and it arms. Why does it do this? Also, sometimes it won't arm until I unplug and replug the battery. It still beeps when I push the throttle to disarm it, it just won't arm.

I usually just ignored the auto arming and turned it off using the transmitter, but I figured I really needed to find a solution after the tuning incident. I was super lucky when I plugged in the battery and sat down to adjust some settings and it autoarmed. I turned to my right to the transmitter by my side to disarm it and the throttle was not all the way down. Heard a whirring, looked back and the quad wasn't there. Looked up, and it was 100 ft in the air. Tried a controlled landing but wind crashed it through a nearby pine tree and miraculously turned out unscathed hanging on the lowest branch. Escaped with all body parts and quad parts intact! One of the scariest moments in my life.

 

[glowingturnip]

yikes ! Firstly, take your props off until you've got this sorted !

I'd check in the receiver test menu. Yaw, roll and pitch should all read zero when the stick is centered and +/-100 at full travel - especially yaw since that's used for arming and disarming. You may need to change the subtrims and end points in the transmitter to achieve this.

Throttle should read 'idle' and 0 at the bottom (and I've allowed a little leeway on mine, need to move it a little way before it becomes non-zero) and 'full' somewhere between 90 and 100 at the top.

If those are set, then the receiver test menu gives you a mock 'arm' and 'disarm' notice for left stick bottom-right and bottom-left

 

[holtneil]

HI also look in the menu there is an auto arm for planes , make sure its set to stick to arm this is for quads and there is a motor spin on arm turn this off too

 

[GJH105775]

Also check that if you have it arming on aux that the arm switch is not flipped, I think I had this happen to mine (scared me to death haha), it was due to having a stick plugged into the aux channel.