NAZA, left/front motor spinning out of control

[Kilby]

Ok, I need some help on this one.

Overall problem: Naza becomes extremely unstable and rocking back and forth from the front left to rear right motors after fast forward flight.

Suspected issue: Naza will not get through calibration with throwing an error message.


Background:I'm a long time DJI user with a Wookong for well over a year. I had an OpenPilot FPV quad that I wanted to add GPS to, so I swapped the CC3D for a Naza. I have everything installed and buttoned up nice with all the props balanced as is the frame itself. For what ever reason, I can not get the Naza to calibrate. I can get it to enter calibration mode, but it ends with an error every time. My wookong I can calibrate with no problem, but not the Naza. I have tried walking all the way out to the middle of the field with no phone or additional electronics on my person when doing it. I have tried it fast and slow.. nothing. I even tried keeping the controller 25 feet away from the copter while it was calibrating... nothing!

The problem that this is having on the quad is a massive instability under certain conditions. The first time I experienced this it was directly on take off during my first real maiden flight with this set up. I did a few test hovers in the garage and all was good, but as soon as I got out into the field it started rocking really bad from front left to rear right booms before eventually dumping into the ground. After making the needed repairs I also rolled all the gains back to default. Again, it hovered just fine and I even got a few decent forward thrusts out of it before the problem came up again. It seems like it starts to over correct for an atti error and then it just goes down hill from there becoming worse and worse till it can't stay in the air any more and dumps onto the ground.

I suspect that my overall problem is caused by the lack of calibration, but I'm open to hearing other theories as well. The unit has never been calibrated once since I've had it, so I can't help but think that is the cause. Does anyone else have this bad of a time calibrating their unit?

-Terry

 

[kloner]

usually when i've seen that it's a motor or bearing going away/was never there.....the motor get's hot and worked fff then you slow down and it's a mess. the same ones usually have a bad drift at hover in manual.

 

[Kilby]

I'm an idiot. I was thinking that the calibration was for the IMU, but it's actually for the GPS, which I don't even have installed at the moment. No wonder I'm getting nothing but errors.

Kloner, the first time it happened on take off before any forward flight. I am going to check the bearings and motors, but it still looked like over compensation of some type.

 

[kloner]

there is an imu calibration utility under tools in naza assistant

 

[Kilby]

So I went out today for another test. I put it up into a hover and it's solid as a rock. I push it around the field a little bit and no problems at all. Then I'm hovering just a few feet away from me very still and out of no where, the front left motor ramps up speed like crazy and causes it to backflip into the dirt. This is exactly what happened every other time, but this time I was very close and got a good look at what was going on.

I'm 100% convinced that this is a Naza problem. This particular one has crashed every single flight. The entire quad was set up with a CC3D board and it was great. When I put the Naza in, I literally did nothing more than transplant the new flight controller, so I doubt it is anything else in the system.

Have you ever heard of this happening before? Front right motor just spooling up real fast out of no where.

-Terry

 

[Kilby]

Front left motor spinning up uncontrollably

I had another thread with this problem, but the title was a little misleading so I wanted to start another.

I'm having a problem with a Naza that I just got. I've been flying DJI stuff for ages (wookong) and have never seen this problem. For some reason my quad will randomly spin up its front left motor real fast while flying. This is so fast that it makes the quad flip and dump into the dirt. I can't figure out what the problem is to save my life, but I desperately need to fix this asap. I'm giving a big demonstration this weekend and I need this thing flying right before then. Anyone ever heard of this before?

-Terry

 

[Bartman]

merged threads using new title. good luck figuring it out.

BC

 

[Kilby]

Thanks, Bart! This is killing me. I should have left well enough alone and kept flying the CC3D. I'm half tempted to order another one real quick for this weekend!