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Other › DJI NAZA-M v1 - Firmware Version 4 Repeated Fly Off
09-18-2013 03:54 AM  5 years agoPost 1
rocket_33

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Mount Pleasant, Michigan USA

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Today was a beautiful day so I decided to do some camera work with my 550. I upgraded to the latest version of the firmware (version 4). It was a bit breezy today but not really bad.

So here is as much detail as I can provide. I had this happen once before but in that case, my Hero3 Black turned on the internal wifi without my doing it. The latest firmware update with the Hero3 seems to have caused this.

Today I had "flyaway" on each of three flights. What happened is I powered up the NAZA. I waited until I had a very good capture of GPS Satellites (no flashing red at all). I then lifted off in Atti mode, climbed to altitude and moved into position. I then switched to GPS mode. It held its position very well. After about a minute or two (possibly three), it suddenly dropped its nose and started to take off. Having read that to safe it, I immediately switched to MAN mode and was able to regain control (good thing I read the postings). With control regained, I decided to climb a little higher, reposition the 550, and once I did that, I then switched back into GPS mode.

I was ready on the sticks and switch in case something bad happened but it once again held its position. At this point I thought all was well but a few minutes later once again it tried to take off. I switched it back to manual mode, regained control, then brought it back and landed it.

I check the battery and the battery was in good shape (not overly discharged). It never went into failsafe (which is set for return to home), it just seemed to fly well and then decide it was going to head for the hills.

I recharged the battery, and then decided to give it another go. I had the same results. Flew in GPS mode, all was good, then hi ho silver away!!! Off to the hills. Switch out of GPS to manual, regain control and good.

Range check on the radio was fine (again it is setup so if it loses radio it returns to home and it definitely was not doing that!!!)

So this is a definite and consistent thing. Since I was running my GoPro I do have video which I will try to edit and post later. Also, my first thought was the Wifi came on but I checked and it had not.

Any thoughts?

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09-18-2013 04:16 AM  5 years agoPost 2
adarsh_007

rrApprentice

Bangalore, India

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A very identical setup I have, but I was not lucky enough to save the f550.
Very similar incident too, waited for the GPS acquiring and for the Naza to record home position, takoff and hire its all perfect, I moved forward for around 100 feet then the Naza had a mind of its own, drifted right and sped backwards and hit a wall and died. Switching over to attitude or manual or even fail safe did not help. Thankfully there was no casualties, the f550 hit a wall and killed itself.
Surprising thing is, I had just done two full flights of 7 mins half an hour back and all seemed to be perfect. And in the third flight after about half or one min after take off, this happened.
I'm clueless!!!
Naza will go back to 3 axis gimbal stabilization I'm thinking. Hopefully it'll do good its job there!!

Straight & Level Flying Prohibited

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09-18-2013 02:30 PM  5 years agoPost 3
Dr.Tim

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Mojave Desert

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By Chance did you recalibrate the GPS after the update? I have had a simular issue that was solved by recalibrating.

From Simple minds come simple ideas! Approach Engineering

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09-18-2013 03:06 PM  5 years agoPost 4
rocket_33

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Mount Pleasant, Michigan USA

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Dr. Tim, yes I did re-cal the GPS after the upgrade.

Also, in looking at the video on the first flight it happened at the 1 minute 02 second point and then not again. The second flight it happened two more times, at the 1:40 point then again at the 3 minute mark. Each flight was appx 7 minutes.

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09-18-2013 07:18 PM  5 years agoPost 5
ErichF

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Sutton, NH

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What radio are you flying on? I don't know if it means anything or not, but every fly off I have read about involves a Spektrum radio. Even a customer at work that we built his S800 with a DX8 had a fly-off. All the systems I have built and fly with Futabas have had zero issues. My 550 and NV2 has over 5.5 flight hours on it, without issue. Tonight I have the iOS Ground Station and Datalink to install, so I will be tearing into the system for that.

Will report later in the week how that system works out.

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09-18-2013 08:06 PM  5 years agoPost 6
rocket_33

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Mount Pleasant, Michigan USA

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Very interesting. I am using a Spektrum DX8 with an.AR8000 receiver. I have a futaba receiver so I may experiment with switching them out and seeing what difference if any occurs

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09-18-2013 09:44 PM  5 years agoPost 7
ErichF

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Sutton, NH

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DX8 and AR8000 with telemetry is what we built on that troublesome S800. It had issues with a NAZA V1 and then a WKM. Are you using the telemetry stuff?

Since that bird, I've built five more trouble free S800s, three smaller Quads, and my own 550 with no issues.

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09-19-2013 01:57 AM  5 years agoPost 8
rocket_33

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Mount Pleasant, Michigan USA

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I am not using telemetry on the 550. I will try using my futaba and report back. How did you run the antennas on yours to keep them at the proper angles?

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09-19-2013 02:18 AM  5 years agoPost 9
hams

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Ohio

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I have had a fly off and I am using a Futaba 8fg w/6202sb rx. fwiw

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09-19-2013 02:34 AM  5 years agoPost 10
TMoore

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Cookeville, TN

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This is not good.

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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09-19-2013 10:34 PM  5 years agoPost 11
rocket_33

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Mount Pleasant, Michigan USA

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I had a chance to look at and play with the new Blade 350 quad. I will tell you what. at its price point and how it flew and its capabilities, I would be hard pressed to recommend a NAZA 450, Phantom, or 550 over it. I was very impressed....lol and no fly aways

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09-23-2013 11:47 PM  5 years agoPost 12
Dr. Fibinotchi

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Sioux Falls SD

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hmm
saw it in the local hobby store. I will have there guy get it out so I can play with it>..

-Cody

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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09-23-2013 11:49 PM  5 years agoPost 13
rocket_33

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Mount Pleasant, Michigan USA

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I have had a fly off and I am using a Futaba 8fg w/6202sb rx. fwiw
Has this been a regular occurrence? I just got back from a bit of travel so I have not had a chance to try the change out as yet. Can you describe in more details? Was it similar to what I spoke of?

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09-24-2013 12:09 AM  5 years agoPost 14
hams

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Ohio

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Has this been a regular occurrence? I just got back from a bit of travel so I have not had a chance to try the change out as yet. Can you describe in more details? Was it similar to what I spoke of?
Just happened one time. The quad started to not completely follow my stick commands then just went flat out in a slow descending fast dive into the ground. Luckily it did not go far. All I could find was the gps/compass plug was half way plugged in. I could not verify if it was that way at the beginning of the flight or happened as the quad cartwheeled roughly 5 times across the field. This was on 3.16 and since I have updated to 4.0 I have not had a single issue. It does make me nervous, as we fly pretty far away from us (>1 mile) and it would be a bummer to lose a grand worth of equipment.

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09-24-2013 01:55 AM  5 years agoPost 15
Dr.Tim

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Mojave Desert

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Says to recalibrate transmitter after install. I guess I will start doing this as well ...
http://www.dji.com/dji-released-naza-m-firmware-4-00/

From Simple minds come simple ideas! Approach Engineering

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09-24-2013 11:29 PM  5 years agoPost 16
rocket_33

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Mount Pleasant, Michigan USA

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Well beginning the test, the first thing I am going to try as I have been reading about potential interference from motor/speed control/etc.

I decided I would try moving the compass/GPS antenna higher and re-route the power leads away hopefully minimizing the potential for magnetic interference.

I thought I would work on this first because I have a difficult time believing the Futaba/Spektrum thought because of this. If it were a radio problem, why would it not go into failsafe and return to home instead of the fly offs. I am not completely discounting this but want to make sure everything else is perfect first. Maybe it is possible that the overall installations were different and thus it seemed to be that way.

I will test it out tomorrow and give you an update

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09-25-2013 12:23 AM  5 years agoPost 17
Dr.Tim

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Mojave Desert

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Also check that your ESC's have the correct 400 htz refresh rate. I have had issues with this in the past when I was first starting out with quads . I would just grab the Cheapo's and go fly .. just need to pay attention to the details more these days.

From Simple minds come simple ideas! Approach Engineering

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09-25-2013 01:09 AM  5 years agoPost 18
rocket_33

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Mount Pleasant, Michigan USA

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These are the ESC's that came with the DJI 550 so there is no programing options (that I am aware of)for them

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09-25-2013 12:56 PM  5 years agoPost 19
unclejane

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santa fe, NM, USA

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Just a thought on this that may or may not be an issue. Try to keep the video transmitter antenna as far away from the RX antenna as possible. Even though they're on totally different bands, it's conceivable, at least to me, that the field strength of the RF energy right next to the vid. xmitter ant could be strong enough to desense the RX. I don't think anyone knows the actual dynamic range of even good receivers like the Futabas, so it's probably a good precaution to take.

On my phantom and F550 I've done everything possible to get those RX antennas the $$$$ away from the video antennas; so far no troubles at all on either one even when getting quite a ways away from the field....

Dunno, just another thing to keep in mind installation-wise that may help?

LS

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09-25-2013 01:07 PM  5 years agoPost 20
ErichF

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Sutton, NH

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Depends on what freq you use for video, but yes. I use 1.2 so to prevent 2nd order harmonics messing with my RC and GPS systems I install a Low Pass Filter on the video TX Antenna output. The video antenna is also mounted out near the end of one arm, away from all electronics.

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