i just got a apm board 2.5.2 and the internal compass of this board is damaged. and i am trying to fly the quadcopter by disabling the compass.
when i take off, quad starts its yaw motion and i am not able to fly this quad even in stablise mode. is there anyone who tried flying without using compass module??

Stabilize mode doesn't use compass. I have flown my quad without GPS+Compass (using apm 2.6) without any problem. For yaw issue check the PIDs, motor layout & directions.
http://copter.ardupilot.com/wiki/stabilize-mode/
Which frame are you using?

Btw how did internal compass get damaged?

if stablize mode does not use compass then how it controls quads yaw motion???
and internal mag is defected i dont know how. it show bad compass health when i enables the compass.
i tried flying by disabling compass then the quad takes off but it also revolves around its axis and the quad is not keeping fix heading

i am using a carbon fiber fram in X config. and even by adjusting the PIDs i am not able to solve the problem

Manual mode uses only gyro.
Stabilize mode only uses gyros and accelerometers.
Altitude hold mode uses gyro, acc and barometer.
Loiter/auto uses mag gyro acc GPS barometer.
There must be some problem causing erratic yaw. Magnetometer is used while in GPS modes.
It is natural for a quad to yaw initially when built. It may need some tuning and mechanical alignment.

thanks for rply. i will get back after some experiments....:-)

Bad compass health doesn't mean that compass is faulty. If there is too much deviation in compass offsets the same message will be shown in HUD.

Mag can also be used in simple mode+stabilize mode. For yaw issue, disable compass in MP and see whether quad is yawing. This way you would know for sure if its PID/compass issue.

Reason for compass error can also be unsoldered pads that connects magnetometer check those solder pads . Many sellers keep it unsoldered and sell it as 2.6 version.


C/O ardupilot.com


EDIT:

Just found this, compass is used in all flight modes when enabled. This has been confirmed by Randy who is the lead developer for Arducopter. So a non calibrated/working/configured mag can cause issues.

http://diydrones.com/forum/topics/yaw-not-operating-correctly?groupUrl=arducopterusergroup&groupId=705844%3AGroup%3A394475&id=705844%3ATopic%3A1759412&page=1#comments

https://www.youtube.com/watch?v=mMCwnZnw7gc&feature=youtu.be
this is the video link of my quad.....

From the video, direction of motor rotation looks correct. Orange props are spinning in the correct direction but cannot see the black props clearly. Can you post a close up photo of your setup.
Similarly posting a log(.log) of your flight can help too.

DO motmog calibration

If your compass is damaged you need to manually cut the trace on the back of the adrupilot to disable the mag. Search on google how to do that. I had to the same thing when i began using an external GPS+compass, i had to cut the trace in order to use the external compass.