I think this is a setting problem in SimpleBGC not Gyros. Try increase Roll Power or P value until you see oscillations, then back it down. Mine is at 150 power. 10-15 in P. Also look at I which is speed in Roll. Increase or decrease that and see if it changes after each setting.

If you want try turning power to 0 on YAW and TILT and experiment only with ROLL. Does it roll when panning with other motors off?

http://picpaste.com/thumbs/untitled-KFCX8bqf.1384882258.JPG
my motor is 4114 and 2axis only and not Yaw axis , I pan on hand the Gimbal (no vibration or other noise )!
It seem the sensor lose the earth or not lock horizon to earth!!!
Is the Acceleremoter must calibration in each power on??? When I power off and power on system, Roll answer is change !!!

Not anybody to help ?

Just to make sure - For ACC calibration, make sure to use a level and place Z axis and X axis of IMU in position shown in the manual, hit CALIB ACC at each position and wait still for 5 secs until green light (do not hit write). Keep doing this for all positions, when done hit write. Stop all movement and hit CALIB GYRO. In fact, I calib GYRO every time I power on. I only have Calib'ed ACC once.

Make sure your roll balance is perfect, can you power off and hold camera in roll and it will stay when you let go?

If these are correct, then it must be software, but all settings are different so mine won't help. Look at the Follow mode settings too. Look at dead band and expo and experiment to see if there is any change.

Almost I reach to good condition.
I write solution for all user:
1- calibrate ACC by 6-axis very very precise and only Calibrate ACC once!
2- sensor instal level with camera plate and horizon the motor.
3- In the advanced tab AHRS Gyro trust , I put 10 only!
4- PID setting not connected with this problem !!!
-----------------------
I have a idea for Alexmos boards : Please calibrated ACC sensor in factory and lock that data for ever.
example other board controller Gyro calibrate only be necessary and auto calibrate.
User must instal sensor level with camera plate and trim sensor level (on this stage not need calibrate ACC ) because ACC calibrate is very difficult and no need!

Thank you dear friends

Yes Of course! I do not turn "Skip gyro calibration at startup" is always calibration when start.
After new setting , When Oktacopter pan 360 degree in hover (no motion and speed 0 ) not problem and level is good but when fly in movement (medum speed) and go around and pan in flying camera roll to pan direction!! If I pan in fly(8km speed) to right ,camera roll to right and slowly come back to level! Left also!
I think this sensor system is very sensitive to calibrate and temperature and very variable system!
If you us also the 3axiz compass in sensors , this problems and drifts is removed example Piclock and Hoverfly mount controller systems.
Or us a new good sensor that not very variable!

Lock level to ground (horizontal) not very big problem work!!!

Yes Of course! My motors 4114 and my camera is 250 gram (very strong for this camera set up) and very good balance.

After top, I put Gyro trust to 100 -- 65 and 20 in 3 profile.
Gyro trust low (20~40) in pan , roll problem in hover fly or hand pan is remove but roll problem in fly (forward speed 10) and pan in this fly, is big!!!
Gyro trust high (90~150) is inverse top subject!!!

It seem I will regulate that between this Gyro trusts, example 50.

But twice I say this problems not remove completely! Because all calibration sensors by user and hand in different conditions!!!
It must calibrate in factory and lock in ICs and user only must level the sensor with mechanical and camera and trim that fine and finish.

Appears to be fixed after reflashing and applying my settings from scratch instead of loading v2.2 settings

You should trim your channel of radio on speed mode! Is that better us elevator stick for speed mode and throttle stick on angle mode.