Had a crash and now when connected to mission planner yaw is continuously changing. It starts at 360 and counts down. I created a short video showing this in mission planner. Flying is of course impossible, the copter just starts to yaw out of control.
Any suggestions to fully diagnose this or correct it? I suspect the gyro is messed up. I read about reflowing but would appreciate more details on how to do this. I do have a heat gun.
Ive the same issue, but if i disable the mag, the heading is stable. if i enable the mag, the yaw is continuously changing. the declination is made.
Damn, my usb connector just broke off, looks like im done testing for a bit unless I can get a small enough soldering iron to put this thing back on. I really really really want the new APM 2.0's to ship
Could you try enabling your compass, running the CLI, test, compass and posting the results? that will determine if your compass is broken.
Compass is now enabled and tested in CLI. If i let my Copter stay on my desk, the values are staying too. if i move the copter about roll / pitch / yaw, the values are changing correct.
so my compass is okay, i think.
..you're saying that if you enable the mag, your yaw keeps changing and when you disable it it stops changing?! I think perhaps what you're seeing is the temprary correction to your heading as the APM starts receiving data from the compass. So imagine that your APM thinks it's heading north when you start it up...but the mag is enabled and in fact, the APM is facing south...it will take a while (maybe 15 seconds?) for the APM to correct the heading to point south.
Can I ask, if you leave it for 3 minutes or so with the mag enabled, does it settle on a compass heading that's close-ish to the correct heading?
U can ask, thats why we write here. ;)
If i let my apm a while on my desk, the yawing is less, but it dont stops. the groundcourse and the yaw are spinning. after a while more less, but they do.
and, if i disconnect the apm, and dont move my apm, the heading is another. e.g: if i let the apm 3 min stay, it faces to north, maybe. if i reconnect the apm to the pc, the heading is maybe south. so, what is the compass doing there?
in CLI it is staying for hours in the same heading. after disconnect, the heading is another too.
i dont know the real heading, because ive no real compass.
hmm...i have no idea. I've spent a lot of time with the compass and APM and I've never seen what you're describing.
presumably erasing your eeprom doesn't help (start CLI, setup, reset)?
If that doesn't help, i'm afraid I'm out of ideas unfortunately!
Yep, ive erased the eeprom and so on. but doesnt work.
ive no more ideas.
My quad is doing the same thing as well...
Do you have more details? like the board you're using (presumably APM1). Do you have a compass attached? Is it a new build (i.e. you've always had the problem) or something that just started happening?
My guess is that your compass is not functioning and so the natural drift of the yaw gyro is not being corrected (this is what the mag does). If you connect your APM through the usb port, then click the AP Mission Planner's Terminal button, then enter test and compass and you should see the output of the compass...if you don't then it's likely miswired or perhaps broken.
Yes I actually finished troubleshooting today and from the looks of it, it is the magnetometer. It starts to work, then sometimes it reports back 'not healthy' when doing test->compass in CLI. I've disconnected it and now I have the subtle natural drift in yaw but imu seems to be functioning correctly and stabilize is working so hopefully its just the magnetometer. I also noticed a bridge of solder on two joints of one of the smd chips on the magnetometer board. I emailed 3DR about it and waiting back to hear.