Just finished putting together my second hexacopter. I built it just like the first one. Loaded up 2.4 and went through all the setup stuff with leveling and such. When I first took off, it acted like it was in acro mode and very unstable. After several more tries, it went stable, but drifted hard right. Tried to correct but no joy. After it flipped on landing I noticed the PC screen which was showing a constant roll. I flipped the hexa over and it still showed a roll. I power cycled multiple times, releveled with no joy. I even when back to 2.3 which is working on the other hexa and it still failed in flight.
I finally hooked it to the PC, releveled and then plotted gx, gy, gz. The artificial horizon showed level, but gx was a constant 30 degrees off and lots of noise. Gy and gz had little glitches every so often, but appeared stable. It appears to be a bad gyro?? Any other guesses? I've got another oilpan, so I'll see if swapping helps anything. Very strange...
Mike
Replies
Im not 100% suree, but Ithink that this problem could also be caused by a bad accelerometer...You said that you saw a constant roll, which might be caused by an incorrect signal from the accelerometer. The noise you describe might be the DCM algorithm trying to fight the bad accel.
Anyway, you say that you have another oilpan, it would be interesting to see what happens when you use that one.
Wouter