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DJI › I cannot get GPS to hold on NAZA-H
08-28-2013 01:58 AM  5 years agoPost 1
Heliluya

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Mount Dora, Florida

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Can any body help me out please?
All lights blinks as instruction suggested, normal mode very stable and smooth, but altitude andGPS mode drifted right big time toward 4 O'clock.

Thanks,
Jeff

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08-29-2013 12:19 AM  5 years agoPost 2
Heliluya

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Mount Dora, Florida

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?????????????

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10-13-2013 07:29 PM  5 years agoPost 3
Heliluya

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Mount Dora, Florida

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Please help before I trash this piece of crap.

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10-14-2013 02:15 AM  5 years agoPost 4
GM1rrElite Veteran - Tallahassee, Florida US - My Posts: All  Forum  Topic

Uh
Not much info here. Is the unit oriented correctly and secured? Do you initialize the model sitting level? Is the model in trim in manual mode? Does it hold in attitude mode? Is GPS antenna oriented correctly? I guess it is possible to get a bad unit but it would be unusual.

On a dog sled team, if you're not the lead dog, the view never changes.

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10-14-2013 04:57 AM  5 years agoPost 5
Heliluya

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Mount Dora, Florida

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Yes, everything is secured, oriented accordingly and in manual mode all cyclics and rudder are trim.

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10-14-2013 05:56 AM  5 years agoPost 6
Paul Woodcock

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Dubai - United Arab Emirates

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Hi

Did you do the GPS setup ?

Paul

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10-14-2013 04:47 PM  5 years agoPost 7
Heliluya

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Mount Dora, Florida

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yes, I also done GPS set up, dancing with it too.

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10-14-2013 04:50 PM  5 years agoPost 8
unclejane

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santa fe, NM, USA

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How far did it wander off? Civilian GPS is only accurate to a few meters - it's normal for it to wander around in a 2 or even 3 to 4 meter area, especially if it's windy.

If it just slap flew away, yeah, that's a problem but even normally, it'll still move around with the flashing green lights....

LS

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10-14-2013 08:45 PM  5 years agoPost 9
Joel Rosenzweig

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Marlborough, MA - USA

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If it wanders, but stays within a circle, then it's operating within spec. But, if it wants to veer off in some direction and does not stop, then it's not operating properly.

In the latter case, first verify using the assistant and the LED feedback to make sure you are really entering GPS hold mode. That is, make sure the assistant says you're in GPS mode when you flip the mode switch, and make sure the LED indicates the same thing.

Then, if all is good there, please double check that your GPS puck is facing the correct direction. I know it was already mentioned above, but it's really worth looking at again. I once put mine on backwards when I reassembled things, and found that GPS hold was broken. It flew off in crazy directions each time. Putting the GPS puck the right way around resolved that problem.

Also, make sure that when you enter GPS mode, you no longer have any flashing red lights. The lack of flashing red lights indicates full satellite lock. If you entered GPS hold without satellite lock, NAZA will fall back to ATTI mode which will drift.

If that doesn't get you going, it's worth talking to the shop that sold it to you to have them swap your GPS puck to try and see if yours is defective.

Joel

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10-14-2013 10:25 PM  5 years agoPost 10
Heliluya

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Mount Dora, Florida

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On GPS mode its flashing 3 reds and 1 green. so it is suppose to be solid green?

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10-14-2013 10:28 PM  5 years agoPost 11
Joel Rosenzweig

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Marlborough, MA - USA

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When you have a satellite lock, you will only have flashing green. There will be no red at all. If it's flashing 3 red, that means it doesn't have enough satellites to get a fix, and so it cannot hold GPS mode.

Joel

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10-15-2013 12:52 AM  5 years agoPost 12
Heliluya

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Mount Dora, Florida

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Took it to the field, and re-calibrate the compass again still cannot get it to go solid green (Still flashing 1 green / 3 reds)on GPS mode.

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10-15-2013 12:59 AM  5 years agoPost 13
Joel Rosenzweig

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Marlborough, MA - USA

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How far away is the GPS puck from other elextronics? Did you mount it to the mast? If it is too close to sources of interference it won't be able to get a satellite lock.

Joel

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10-15-2013 01:15 AM  5 years agoPost 14
Heliluya

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Mount Dora, Florida

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mounted on the boom, 16" from elevator servo

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10-15-2013 01:18 AM  5 years agoPost 15
Heliluya

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Mount Dora, Florida

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will the battery (10S) being 1/2 inch away on top of a control unit can cause this problem?

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10-15-2013 03:47 AM  5 years agoPost 16
Paul Woodcock

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Dubai - United Arab Emirates

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Hi

Just a silly question..... How long do you leave it on the ground, from the time you plug the battery in.

My DJI takes about 1 to 2 min to find satellites and for the red lights to go from 3 to 2 to 1 to none.

Paul

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10-15-2013 04:09 AM  5 years agoPost 17
Joel Rosenzweig

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Marlborough, MA - USA

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will the battery (10S) being 1/2 inch away on top of a control unit can cause this problem?
It's ok for the control unit to be near other components. The GPS does need to be mounted away from magnets, other electronics, and ferrous metal by enough distance. I think DJI defines that as 20cm separation. If you get satellite lock, your layout is fine. If you don't get satellite lock due to lack of separation, then you'd have to move the GPS.

If you suspect that your GPS may be too close to these sources, then try an experiment to just move it off the machine temporarily, and see if it then acquires all the satellites. If it does, that means you are experiencing interference. If that doesn't fix it, that means you have a different problem.

As Paul suggested, it can take a few minutes on a cold boot to get all the satellites. Once you've acquired them, subsequent sat lock can be done in 20-30 seconds.

Joel

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10-16-2013 12:57 AM  5 years agoPost 18
Heliluya

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Mount Dora, Florida

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I left it on out side for almost 10 minutes before I attempting calibration, I just can't even get Digital compass to calibrate been trying over and over. after vertically rotated went right back to 3 red flashes every time. and been doing it in my back yard.

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10-16-2013 01:34 AM  5 years agoPost 19
Heliluya

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Mount Dora, Florida

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I am done with this piece of crap. and the vendor just plan ignored my e-mail.
Will have to do it without GPS for now until I can find a great vender with a great customer service that carry Naza H and try another one or I try another brand.

I would like to thanks all of you for your time and support, Thank you.

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10-16-2013 01:43 AM  5 years agoPost 20
GM1

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Tallahassee, Florida US

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Red Flashes
The three red flashes is telling you that you do not have enough GPS sats for the unit to hold position. Mine takes anywhere from 30 seconds to three minutes to get a lock. Wish I had a clue WHY your GPS isn't initializing but I don't. All three of mine worked from the gitgo.

On a dog sled team, if you're not the lead dog, the view never changes.

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