When setting up gyros on the camera mount, particular attention to the settings in the radio is necessary.
We'll use the tilt (up and down) function as an example.
In your radio, find the Dual Rates/ Exponential pages. In some radios these are on the same page or in the same function, in other radios these are separate functions. Read your instruction manual to find out.
In Dual Rates, set your elevator rate to 10% as a starting point. Set your Exponential to 80%.
As stated previously, when using the GY 240's, set the mode to NON-AVCS or rate mode. DO NOT use the Heading Hold function. Set the gain on the gyro to 10% or less to start with.
Now turn on your radio systems and watch the direction of movement of the tilt function when giving a stick command. If backwards, then reverse that channel in the radio.
Wiggle the helicopter or camera mount in a nose up and down fashion and watch the response of the tilt movement. If backwards, the change the direction of the GYRO.
It is recommended that you work on one function (tilt, pan, roll) at a time. When the camera mount is going bonkers, it is difficult to know which way to go.....
Setting the dual rates and Expo as recommended gives you a slower, smoother, controlled movement of the camera mount system. Nothing worse than a video that jumps around very quickly, making the viewer seasick.
Adding the gyros helps, HELPS, to counteract the small corrective movements the pilot puts in when flying the helicopter.
Once you have everything working in the proper directions, then go back and fine tune the settings, the Expo, Dual Rates, and Gyro Gain to get the feel and action that you require. Remember to start slow and add in the dual rates and Gyro Gain as needed.
Too much gyro gain will start a feedback oscillation. When you see this, just back off the gain a little and try again. Usually between 5% and 20% is the magic number.
It does NOT hold a target in the camera viewpoint, and will not remove or diminish any vibrations from the helicopter. Your tuning and setup has to accomplilsh that.