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Old Jul 15, 2012, 08:47 AM
dums2000 is offline
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France, Auvergne, Clermont-Ferrand
Joined Jul 2012
10 Posts
KK board V5.5 issue - motor 3,4 don't start !

Hi everyone !
I got an issue with my kk board v5.5.
Until today, everything was working great for my cheap XCopter.... (about 50 flights for now)

But today, when I connected battery to fly, only 2 motors (1 & 2) works...motors 3 & 4 don't start....!

What I first have done/test now :
- successfully test each motors/ESC without kk board
- calibrated again ESCs without kkboard.( taking care about nimh Battery type and not lipo)
- tried to connect motors 3 & 4 to 1 & 2 kk board ports : motors 3,4 works like 1 & 2 , but 1 & 2 don't start....

then :
- I tried to flash again the kk board with KK v4.7 firmware : no improvement....
- I tried to flash with M.Kim V2.5 firmware : no improvement.
- so coming back with KK V4.7 firmware.

Next :
- I tried to do ESC throttle calibration on the kk board
--> strangely, I discovered YAW pot is now reversed : 0% CCW is now 100% CW.
--> So I tried to reverse YAW pot . I discover ROLL pot is also reversed.
So reversing POT procedure mean begin with ROLL pot to 100% CW.
--> leds correctly flashes 3 times, but moving AILERON stick don't reverse ROLL pot .Also moving RUDDER stick don't reverse yaw pot ....

So, I successfully do ESC throttle calibration, with YAW pot initialy 100% CW

but : motors 3,4 don't start...
last thing I do : trying to reset kk board, with all pots to 0% . tried also with all pot to 100% (because of all pots seems to be reversed)

So what to do now ?? do you think this kk board is totally broken ?

thanks for your help. sorry for poor english : I'm french :-)
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Old Jul 17, 2012, 06:45 AM
er9xuser is offline
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Slovenia, Ljubljana
Joined Sep 2011
1,981 Posts
Try to connect let's say ESC 1 to motor #3 and check if it's working. If not maybe motor is gone.
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