... and got continuously rotating servo on Pan axis...
The following will be plainly clear to many but may just be enlightening for some. It is addressed to the latter - with apologies to the former for stating the bleeding obvious!
I get the feeling that there may be something that some perhaps do not understand about setting up stabilisation on a 360° pan axis. Let's take a standard 360° AV200 as an example, with a Picloc mounted on a small 'L' bracket in the middle of the front arch, i.e. directly above the camera lens. This is how many mount the PL and to be honest there are not many other obvious places without getting really inventive. The PL mounted in this position will be rotating with the arch.
It is important to appreciate this last fact. The Picloc remains stationary relative to the Roll and Tilt axes, but it rotates with the pan. The Roll and Tilt axes both have feedback potentiometers that tell PL where they are, but with the Pan axis PL has to sense and correct its own movement without reference to feedback pots. This is what the 360° box is for in the SERVOS tab of Toolz. It tells PL there is no feedback pot for the axes with the box ticked.
So having understood all that, if the MR yaws (rotates) the PL will sense this 'uncommanded' rotation and instruct the pan servo to rotate the arch to which PL is attached in the opposite direction to compensate, thus keeping the PL - and the camera lens - pointing in the original direction. This is the basic principle of gimbal stabilisation.
OK. If we now go back to the setup stage, with the MR/AV200 sitting on a table. When the pan starts rotating the MR airframe (hub and booms) will rotate but the camera mount (which doubles as the skids) will be stationary on the table. This means that the PL will also be stationary and will have no idea that the airframe above it is rotating and will consequently do nothing to stop it. But, if you lift the airframe, the AV200 below will then start to rotate instead. The PL will sense this and issue a compensating command to the pan servo to stop the rotation - once it is all set up properly. There is not that much to set up. The first, most basic is to adjust the servo centre with the first big slider in the SERVOS tab of Toolz. Do not tighten up the top nut on the 360 plate until the Pan servo centre has been set. This will allow the servo to turn without turning the top plate of the mount and will save lots of fingers, tangled USB cables and broken USB connectors.
So, back to the plot .... before you think that the PL is broken, when the top of your AV200 starts rotating and won't stop, try lifting it up (holding the top part), therefore allowing the bottom part to rotate instead, and see if the rotation behaviour changes. Sometimes, just switching it to manual and back is sufficient to stop the rotation.
Another way to check all this is to set it all on the table and switch everything on. If you give a pan command the airframe on top will start to turn and will not stop until you give an opposite direction pan command. But then the airframe will rotate in the other direction and again will not stop. This is because when the pan command is given, the PL expects to be rotated. When it senses it has not moved it either continues to tell the servo to keep turning or it doesn't tell it to stop. If you pick the MR up and the mount then starts to turn, the PL will feel this movement and will tell the pan servo to stop.
