I did 3 flights with my quad this morning and the first flight went flawlessly. On the second one, the quad suddenly yawed about 45 degrees really fast to the left. I thought it was the wind or a fluke, so I brought it down (with a hard landing) then fired it up again. Same thing happened about 2 minutes into the flight, suddenly yawed really fast at about 45 degrees and starting drifting away from me but I recovered and brought it down safely. (my piloting skills are getting better) .
I was flying in stable mode the entire time, I'm on 2.0.33, with gps, and no magnetometer. Why would this have occured? Could it be a faulty motor or ESC? I checked all connection and found everything to be secure.
I have the same problem with beta 33. I was hovering gently, and all of a sudden the quad yawed quickly some 180 degrees or so. This happened twice (!).
Yawing 180° suddenly is usually caused by the quad finding a shorter route to the desired Yaw angle. So say you are holding 0° and your copter has turned to 188° because of wind, ESCs that are not calibrated, or tilted motors. The shortest route is to go 172° CW to reach 0° again. Because the quad wanted to go CW to begin with, it rockets around CW to get to 0°.
This is mostly a hardware issue with the quad setup not balancing the output of the counter rotating thrust.
Thanks. Two questions:
1) Will miscalibrated or tilted motors manifest itself somehow in the logs? I can't see any tilting, and I have calibrated the ESCs -- but I have upgraded the firmware and erased the eeprom after that. Should I re-calibrate ESCs?
2) One of my propellers is a little looser than the others on the shaft. Can the propeller slip on the shaft and cause this?
i had this exact issue yesterday i would fly aggressivly and bang turns 45 degrees
wat i did was.
i thought it was the compass and disabled that, wasnt it.
so i disconnected the the gps (not disabled) and it flys great full stable no sudden yaw.
i dont know wat it is. but i worked out how to stop it for me.
for me, too! I diconnected the gps and now it works without this yaw issue in stabel mode!
So do I have to replace the gps?
I'a m new here, maybe somebody could help!
have the same problem running 2.0.33, compass disabled. hexa with 20-22l Motors and turningy escs, 1045 propellers.
...suddenly it starts yawing!
did all the homework: esc recalibration, etc.
Can somebody share pids for similar frame (55cm, hexa, 1,6 kg with battery) to sort out wrong pid settings as a cause.
Thanks a lot!
did that today, an hour ago with the new mission planner.
the hexa flies smooth on pitch and roll with standard pids, but has the same "sudden yaw issue" .
- shoud I change yaw pids for hexa (55cm; 1,6kg; 6x20-22l, 3s)?
- should I change motors, escs?