Today I was dialing on the gains on my Tarot 650 build (details here:http://www.multirotorforums.com/showthread.php?22168-Dual-Mode-(Hopefully)-Tarot-Ironman-650-Build). I felt like I was getting the gains where I wanted them but I did have an issue which caused some alarm:
When doing a full throttle climb out, the quad started off very nicely - good response, stable climb. But then a slow roll oscillation began which rapidly got very large indeed (maybe +/-45 degrees although it's hard to say exactly). When I centered the throttle it came back to a level hover very quickly, but I really need it to be stable in a high speed climb.
My thoughts were that this kind of oscillation was due to gains being too high, but I lowered and lowered the vertical gain right to the minimum of 50% and it wouldn't go away. The pitch and roll gains seemed to be stable - nice attitude hold and one small overshoot when centering the sticks from about half throw.
Any idea what's causing this roll oscillation when climbing? It really looked like it was about to flip if I didn't let go and let it settle down.
When doing a full throttle climb out, the quad started off very nicely - good response, stable climb. But then a slow roll oscillation began which rapidly got very large indeed (maybe +/-45 degrees although it's hard to say exactly). When I centered the throttle it came back to a level hover very quickly, but I really need it to be stable in a high speed climb.
My thoughts were that this kind of oscillation was due to gains being too high, but I lowered and lowered the vertical gain right to the minimum of 50% and it wouldn't go away. The pitch and roll gains seemed to be stable - nice attitude hold and one small overshoot when centering the sticks from about half throw.
Any idea what's causing this roll oscillation when climbing? It really looked like it was about to flip if I didn't let go and let it settle down.