Hey guys i have an issue with my newly built octo, whenever I switch to loiter it cuts throttle and falls like a rock whist still leveling.
I need to know why it is behaving like this and how to fix it if anyone knows, i will also link the KMZ and log file, but from my looking at the logs, it appears as though it thinks it is very high up even though its bouncing along the ground.
When i was near the ground and switched to loiter, it first throttled down to minimum throttle then slowly sped up before suddenly rocketing into the sky.
Replies
Seems like a vibration problem causing too much noise in the accelerometers.
Check each motor, propellers balancing and arms rigidity. Mount the APM with a dampened fixation. Witch frame is it ?
http://copter.ardupilot.com/wiki/vibration-damping/
You should check as well that the altitude controller is rightly tuned for your octo. If you have very powerful motors then the default settings will not work.
http://copter.ardupilot.com/wiki/altitude-hold-tuning/
Olivier