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Jaybee said:The Editor said:That won't work - If you move the gimbal around without it being attached to the Phantom it will try and fight itself due to the fact that there is no feedback loop information coming from the accelerometers inside the Naza.
The Zenmuse works on a closed loop basis and takes into account not only its own data from internal gyros and IMU/GCU but also utilises a secondary 'feedback loop' from the Naza itself - This is why it's correction and stability is so good.
You need to do any testing with the gimbal properly attached to the Phantom.
Right, fair enough. However, the other axis don't vibrate violently during this testing (they are quiet and smooth unless you go crazy and tilt to extremes) but the yaw axis has crazy vibration. Why would only the yaw servo fight itself?
The Editor said:You should also do a full calibration of the Phantom and an X1 calibration as well.
Then try, and see what happens
Sure, I had done all that.
I would imagine because the yaw axis is in whats known as 'follow mode'. This means there is a deadband of around +/- 5 degrees where the gimbal is getting aircraft information on the yaw of the craft itself (via Naza and Compass). It then counteracts the yaw with opposing torque in the opposite direction. Outside of the deadband the gimbal will 'think' the craft is attempting to actually turn/yaw and the gimbal will try and follow (with an exponential curve).
You maybe getting away with hand holding the gimbal for Pitch and Roll (to a point) but the yaw axis will be much less forgiving and more locked into the aircraft movement as it needs to 'sense' not only yaw drift but also true yaw/turns. This is why it's having a spazzy fit !!