I have attempted to tune the various PID loops on my PX4 multicopter using the Set RC to Param feature in QGroundControl. I am able to see it working while on the ground, and verify that turning the knob results in the parameter changing through the range of values that I desire. However, while actually trying to tune my multicopter in the air, I will lose control of the vehicle momentarily.
The behavior during the period ranges from continuing to move in one direction while sticks off in altittude mode, loss of all propulsion resulting in a crash, and doing a complete flip and falling to the ground. This only appears to happen while I have a parameter set to control from an RC input, and only when I try to adjust the knob. I can also replicate this behavior on the ground with props off. I notice that the lights on the pixhawk turn off momentarily, and the motors continue moving. When the lights come back on, the motors all seem to make very large adjustments.
Upon analyzing the ULog data, there is a noticeable gap in the data where the even occurs.
Has anyone else had this experience?
I'm using PX4 firmware, Pixhawk 2, QGroundControl and have a octo_cox frame (also tested with hex frame).