Brand new F550 + Naza V2: awful performance

[SkyRaptor]

Hi guys,

I've got a Hexa MikroKopter from a friend as a gift and enjoyed the toy.. it flies great but too much complicated and ugly. Then I decided to get a F550 + Naza to play around.

It is much easy to assembly and setup... but the maiden flight was way disappointing.

In the manual mode I could fly the F550, no problem all (I'm used to helicopters).
But the Atti mode is awful.. the 550 could not keep altitude; even with throttle stick at middle, it keeps going up and down.. I'm talking about a 10 feet altitude oscillation.

The cyclic (elevator and aileron) was awful as well.. it could not keep stable with a little bit of wind. In the GPS mode same behavior.

I let all the gains standard (140%)... tried to change the vertical gain so the toy keep the altitude, but no success at al.

I'm really disappointed. Next weekend I'm gonna shot a video and post it here.

I'm an experienced heli modeler, so I keep attention on transmitter calibration and things like that.

Any hints are welcome.

Best Regards.

Alex.

[Empire Support 2]

Alex,

Did you do the Advanced IMU calibration? If not I would that first. I assume you did the Compass calibration at the field you were flying at. Were you flying with 10" props or 8" props. I find the F550 with 10" props to be effected to wind the 8" on 4S is much more forgiving.

[SkyRaptor]

Thanks Empire Support 2,

I didn't do the Advanced Calibration. The software said there were no need, but I can do if you think it can help.
The Compass Calibration is done even though my flying field has some high voltage lines.. but I guess it will not disturb the altitude control that way.

I'm using 10" prop with a 3S 5000mAh LiPo. A 4S one is on the way, so I will replace the props by a 8" ones. Could unbalanced props cause such altitude oscillation??

Some cyclic issue I would not mind tuning, but a 10 feet altitude oscillation is bothering me a lot - for a controller supposed to take off and landing by itself. I don't even know where to start

I have mounted the MC with the supplied tape in the middle of the frame, with PMU and Rx beside MC. Is that any issue with such configuration?

Alex.

[Empire Support 3]

Yes, please redo advanced calibration. If you can please take a screen shot of your mod values after calibration.

Unbalanced props can cause many issues, so you should do your best to balance them as best as you can.

Why don't you try these gains first.
165 /165 150 150
85/85

Your install should be fine but to be on the safe side can you please post a picture?

[SkyRaptor]

Empire Support, thanks a lot for the great support.

I will take some pictures from my assembly and post here.

And I will take these actions:

1) Balance the props;
2) Perform Advanced Calibration and post the values here.
3) Set the gains 165 /165 150 150 85/85

For now I can only use 10" props with 3S.. my 4S lipo will take some days to arrive.

Any additional hint/idea is welcome!

Alex.

[SkyRaptor]

I took some pictures (sorry high res, but it is easier to check details)..
I checked the Mod values before Advanced calibration and they are all in the expected range.
The picture is after Advanced calibration. The Gyro Mod keeps changing from 0.1 to 0.5.

I tried to balance one prop, but it is really complicated... and I will have to execute the procedure 6 times.. is it really needed for original props???

Thanks.

Alex.

[Empire Support 3]

Its not necessary but you should spend the time and balance the props at some point. Everything looks good. Try it with the new gains and see how it does.

[Empire Support 2]

Alex, you obviously took some time in your build. The only thing that I see that concerns me is the GPS/Compass mount. I am afraid that you might get some vibration in that location. I have mine mounted on the 4 arm screws on the right front arm. It is a tight fit but you can get them tightened down. That would require that you adjust your coordinates in Assistant. I fly with unbalanced props on occasion. If you are just sport flying right now unless they are way off, you should be ok. It looks like you are using the DJI 10x4.5. I like the new 10x3.8 which I have used with both 3S and 4S. They are not expensive. I would also add about 30% expo in on your Tx for the aileron and elevator channels. After that your next step is to get it back to the field, calibrate your compass and do some flying. Let us know how it goes.

[SkyRaptor]

After Advanced Calibration, I performed a test flight and shot 2 videos - it's not that easy to shot with one hand and try to fly an uncontrollable model with the other.
Sorry the low res, I forgot to change my phone settings... but it is enough to see the problem.
The radio beeps in one video was my Rx Battery alarm wrong set.

By the way, in Normal Mode I can control the model quite easy... the motors are proportional to the throttle stick, so it is like flying a helicopter.

I think I have a defective unit... at least the barometer.

F550+Naza2 (1 min 18 sec)

F550+Naza2 2 (0 min 47 sec)

[Empire Support 2]

If you are not moving your throttle, there is something definitely going on with your Baro sensor. I have not seen that kind of behavior before. I would contact your dealer and send him a copy of the video and a link to this thread.

[SkyRaptor]

Thanks Empire Support, I appreciated your effort helping me!!
Although I'm an experienced heli modeler, this is my first multicopter build, so I didn't know whether something setup wrong or a defective unit.

This kit was get from Flying-Hobby (HK) and they have a great support. I'm sure they will handle this issue in the best way possible. I will keep you posted.

Alex.

[Scrat]

Hi SkyRaptor,

I stumbled upon your thread while searching on google.

I also bought a DJI F550 + Naza M V2 a couple of weeks ago from flyinghobby, and have also been trying endlessly to get it to fly stable as I'm experiencing -the exact same behavior- as you have.

No matter what gain values i use it keeps jumping up and down 10-15ft at a time without any stick input at all (all sticks centered).

Did they send you a replacement/ recognise the problem ?

Best regards,
Raf (Belgium)

[ritabratamukherjee]

Hi SkyRaptor,

I have a Hercules 500mm Frame operated on a DJI Naza M V2 setup. I am experiencing the same problem, though not always.. kind of erratic change in altitude at times with all sticks centered.. I stumbled upon this thread and read about the issue you have posted and its the same... so I guess you have already been able to eliminate the prob, if you could share your views as to how you did your trouble-shooting..

Any help would be highly appreciated..

to just let you know am using the Hercules 500 frame
with DJI Naza M V2
NTM Prop Series BL Motors
AE 30 ESC-s
10x4.5 Props

My gains are well adjusted to my setup.

Thanks
Ritz (India)