Phantom2 (quad) pitches and rotates going up.

Somewhere along the line in one of my crashes, I think I must of got something wonky.

Symptom: with just a push on the vertical stick, the quad pitched up the back left and down on the front right. I end up rotating a bit too.

Things I've looked into:
Swapped props
Balanced props
Opened up the case to look for weirdness, like cracks, nope seems clear there.
My only odd thing is the motor on the front right just seems a little less stiff and when throttling down the craft seems to come to a stop last.

Any ideas would be great. Thanks!

Ay possibility you may have replaced a prop with a different pitch? If the GPS ( compass ) is pointed in the wrong direction, odd things happen . The Naza is floating loose?
If it has been through a crash, the slow motor may have a bit of dirt inside. Try swapping a couple motors to see if the problem moves with the suspected motor.
Just Wild Guesses ----
You might also have a prop slipping if you aren't using the original props. I put rubber "O" rings under the props, to give them a better grip. The prop nut hit the shoulder on the shaft, before it
tightened the props.

Thanks Lem504 for the ideas.

The naza v2M seems solid, in fact everything in side seem solid. the GPS is screwed to the top of the inside of the housing on the Phantom, and seems orientated correctly.

On the prop slip, the motors are keyed with with 2 flat sides, so I'm sure the props aren't spinning freely, i suppose it could be possible there might be some sort of play that i don't detect just testing them by hand. That's interesting though, I might take a look.

Yeah, I'm thinking I probably need to buckle down and do the swamping around of the motors and see if my problem moves with it.

I had some crazy oscillation last night and it whirled down from 30 ft, luckily my carbon props lived to fight another day, and didn't bend the crap out of my gimble this time

I'm very surprised to hear this from a Phantom 2. Have you done any dramatic gain changes from the factory settings? I know there was a issue some time back with the batteries. If I am not mistaken your Phantom 2 has the DJI specific battery with built in checker. Is that correct? I seem to remember reading that there was a contact issue internal with either the airframe or the batteries themselves.

Jonas - Has something changed since I saw you on Sunday? Then, almost all the problems were associated with the new carbon props. When you switched back to the factory plastic props, the performance looked pretty normal to me. I'm still thinking it's just a gain adjustment issue with the new props.

...Tiger

It was less pronounced with the default props, but its still not going up even and rotates my view. I still need to play some more with the gains, but this seems non uniform.

One time (probably because of the attitude gains" the pitching forward cause a catastrophic oscillation and it fell from 30 or so feet. Luckily into grass


I did swap the two motors around so I'm curious to see if the behavior reverses.

GPS, Yeah its the battery with the built in checker. I didn't notice anything odd however with it touching. It does have a tenancy to eject itself when theres a hard crash. I like to think of it like an escape pod. Lolz.

You know what you might try? Re-calibrate the compass.

Yeah, I've done calibrations in Phantom mode onsite. Interestedly, in NAZA mode the Flip GPS switch maneuver doesn't seem to put it into that calibration routine.

I'll double check in Atti mode ( so compass and GPS isn't a factor), but If I recall correctly is was still doing the same thing, but it would be a good test to chunk down the trouble shooting.

Okay, not sure what I was smokn on the Naza mode and calibration that works fine, but I was able to pull that off and after swapping the motors around while its still a bit wonky, my quick night test seems to show improved stability and less of that vertical torquing around.

I'm missing something here. What is "NAZA" mode?

...Tiger

On the Phantom 2 assistant software, you can either leave it set to "Phantom 2" or flip it into "Naza" mode opening up IOC, Atti, etc.

Im still bummed that doesn't let me use the NazaM assistant, since that looks like its got some more toys like the Motor test.

I am not familiar with the Phantom, but it sounds like you should
Re-configure the controller ( Naza ) with the Assistant or what ever they call it on the Phantom.
Keep in mind that you need to save - save about every time you change something in the configuration, or the new setting isn’t always applied.
The assistant should allow saving the current settings to a file, so you can have a back-up if things get worse.
My thought, just re-configure it from start to finish. DJI had several videos
About setting one up, if you get lost.

NAZA Mode - I either never noticed that in my software or maybe it's not an option on the Phantom-1. Then again maybe it's because I've never upgraded the software from day one. On mine, IOC mode is just a check box you click to turn it ON. Speaking of that, I'm seriously thinking of turning that off. It's what got me my first ever crash last week. I bumped the IOC switch ON and didn't know it. That resulted in all my controls being reversed when the Phantom got behind me.

I wonder how they keep you from using it as an ordinary NAZA? Must be that you registered it the first time as a Phantom. DJI has some funny policies. I hope there is a way to overcome that since if I ever have a really bad crash, my guts will probably move to another platform. Guess I'll worry about that when the time comes.

Just looked at the weather and Sunday doesn't look to bad (so far). Maybe we can make a comparison between our two Phantoms as to how they handle the hard vertical acceleration. I don't think mine is super stable either, but I guess I've never thought of it as a problem since you wouldn't normally fly it that way if you were shooting video.

...Tiger

Looking through the naza-m assistant, is pretty much the same as the Phantom2 assistant, but has a few more options for defining your craft and motor test.

I'm guessing that since the USB goes into the Phantom2 controller board, that's how they do the restriction. Not sure why they would take out the motor test for example but it is what it is.

If you are still having problems, the solution might be in the DJI Naza Quick Start Guide.
Check pages 28 to 30
http://download.dji-innovations.com/downloads/nazam-v2/en/NAZA-M_Quick_Start_Guide_v1.22_en.pdf

In any case, please keep us updated when you find the solution.
No doubt, the rest of us will have the same problem - sooner or later.
Interesting note in the directions - It is possible to fly these things with a bad motor - not good - but possible.
It is mentioned in the above pages -

Good Luck

Larry

Yeah that one motor fail unfortunately doesn't apply to Quads. That's for Hexaroter, which makes me thing that's a good reason alone to use a Hex or Octo for Filming, and not losing expensive gear.

So the motor switch seem to help a bit. But I've still got to many variables happening to really conclude anything yet.

Saturaday, I was getting pretty close and had my Carbon props balalnced, was getting my gains dialed in, and boom! In the bussle with other stuff going on, I forgot to tigen down my prop nuts when I when out for a quick test. That was exciting. I thought one of my props exploded. But it just vanished, look for it an the prop nut for a while, but I had to come to terms with the fact that I was out of luck.

So new props on order. On the plus side I'm learning a lot.

So back to my copy cat white props which are a bit sketchy, and the self tightening props are a pain to balance. I've got a magnetic balancer, but I probably should have spent the 10 extra bucks and got a the more fancy one so I could use a piece of fuel tube and stick the prop at the end of the shaft and off the side of the balancer.

recently the challenge has been drift in all modes. I'm not getting the toilet bowl, but a constant drift even in GPS, which is pretty disturbing. Again, maybe a prop thing? It seems like it would know that its way off on the GPS and pull back.

If its not one thing ....

How much drift are you seeing in GPS mode? When it drifts do you let it try to compensate by itself or are you giving stick input corrections?

I need to do some more tests where I have some more room. But it was constantly either drifting to the back and left from the Quads perspective OR it could have been constantly drifting to the NW now that I think about it. I can rule what with another flight.

Constant stick input was needed to compensate. further more is was a tad windy so who knows. I just need to sort out each thing so I can isolate whats up.

K so the drift is relative to the craft. its always drifting to the back left irregardless of its compass heading. So that's interesting.

I flipped around the props and its still has a pretty strong bias in the same relative direction.

I'm thinking that I need to wait until my new CF props show up so I can balance them. The white props I'm running in the mean time are sketchy knockoffs, and probably throwing this test for a loop.