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What the hell happened? Major crash!

#1

Here is a segment from my last flight.
Mid-flight all the rotors just cut off and I crashed. Does anyone have an idea on what happened.

I have a few thoughts myself. I don't think its an ESC issue since all of the motors cut off at the same time and it's not a battery issue because I checked the batteries after the crash.
My thoughts are that the KK-board shut down for some reason.
The tilt-servo is a TowerPro MG995 which is kind of powerful and it's powersupply is the same as the KK-board, a HobbyKing UBEC 5A. I think I noticed the red LED flashed an other time when I tested the servo, but I don't know if this means the board resets or something. And even if it does, is that what happened?

Anyone have an idea?
 

Brian fred carr

Site Moderator
Mentor
#2
Hi Lubis you are having the same problem as me.....so today i re programmed all my esc`s to nic batteries to prevent low voltage cut out and set them all to high I have not had the chance to try it out yet but i will keep you posted on my results
 

Carbon

Elemental Madness
#3
looks like your esc's are programmed for hard cut off when the battery gets low. ^do what Brian did and make sure they are set for nicd batteries
 
#4
what flight board and firmware are you using? I just had an issue like this. the first thing I did was reprogram the esc. It did not work. I never could figure it out. I found one bad solder joint and thought thats it, but it just dosent fly right now. I loose power randomly, and regain it just before hitting the ground. I have been flying some planes latley and havent had any more time to look into my issue, probably not the same, but I am curious.
 
#5
Hi guys
My ESC's are programmed to soft-cut but also for LiPo's. I could change them to Ni-xx but in the video I had just put in new batteries so it doesn't feel like an ESC problem. But ofcourse I'll try reprogram them.

I use the HobbyKing KK2.0 board (http://www.hobbyking.com/hobbyking/...2_0_Multi_rotor_LCD_Flight_Control_Board.html) with the default firmware for Hexacopter +.

Anyone have an idea on the LED flashing on the board when I operate the servo?
 
#6
So, an update.

Is seems that my servo is using to much amperage. It simply restarts the KK board in armed mode, hence it crashes.