Hello All
I am currently trying to flyusing the x configuration with the inbuilt xcopter v2.9 on my kk v5.5 control board. We are using flysky FS CT-6B Transmitter with mode 2 configuration. On my first trial it flipped during liftoff and all my props broke . for the second trial instead of using props we used gum tape to check the relative speeds of the motors. I found out that the gyro compensation is wrong and it is getting reversed in certain cases.
I made the following observation :-

1. motors are working fine wen moved manually with transmitter sticks.

2. For auto stabilization the set of counter clockwise motors(diagonally opposite). I.e 1 & 3 are compensating in the opposite direction causing it to flip and the other 2 motors are working perfectly fine for both pitch and roll axes.

3. Yaw compensation was perfectly fine.

4. Upon reversing only channel 1 (roll gyro), motors 1 &3 (clockwise diag opp) are performing correctly for pitch compensation, but 2 & 4 give reverse compensation. The result is vice versa for roll compensation.

5. Upon reversing only channel 2 (pitch gyro), motors 2 &4 are performing correctly for pitch compensation, but 1 & 3 give reverse compensation. The result is vice versa for roll compensation.

6. When both gyros are reversed, condition described in point 2 is reversed.

I have been at it for almost ten days now and this is the first time i m trying to fly a quad. I have gone through a lot of videos and tutorials but couldnt figure it out. I am stuck completely now.  Do u have any suggestions?

Regards

Aamodh

Check the prop direction ! CW and CCW ! (Usually mistakes are made by putting wrong prop in a wrong direction)
and check the correction without prop! you can identify by change in the speed of the motor!

@praveen props direction is definitely correct. Besides for this case, I am not mounting props. The problem is probably with gyros, as flight is getting destabilized when disturbed, as indicated in the post

Another basic query: Does xcopter v2.9 necessarily mean it is x configured? does this firmware come with a default + or x?

"X"

@Praveen Can you please give me a link to a good firmware for my board. I dont think the current one Xcopterv2.9 is working for me.

Thank You.

Try this ,it worked well for me!
http://www.rcgroups.com/forums/showpost.php?p=18609175&postcount=73

Hah problem solved after i interchanged two motor connections from their respective Escs'. now it is taking off flying steadily but i need to do some fine tuning to get it to hover without movement. Thank you for helping me.

Great !
just fine tune with gyro's you will be fine! reduce vibration ,than it will fly stable!