Replies to This Discussion

ModeratorPermalink Reply by Dean Wynton on April 30, 2012 at 8:15am

I have tried flying in simple mode and think the declination is ok? As the copter does come back to me. But will set out manually when I get home..

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Permalink Reply by heckmic on April 30, 2012 at 8:10am

That was also my Problem!

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Permalink Reply by Meiser on April 30, 2012 at 1:34pm

I had a crash today. Just recently  Loiter/RTL work pretty good for me but today my quad flew away from me after switching to RTL and came down hard. Mag declination was ok at take off (checked RTL/Loiter/SimpleMode nearby). After collecting the leftovers I checked the settings again and found that the declination had changed to an absolute strange value and from east to west ! 

cheers

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ModeratorPermalink Reply by Dean Wynton on May 1, 2012 at 1:06am

O.K I have checked the mag dec via the log file and graphed it. there are some serious spikes in it and it isn`t smooth in any area. So i selected first person kml in in the log download tab and played it back via google earth, which I assume should give you a first person view of your flight via the data collected from your flight.

Well it was like a blur off spinning horizontally and vertically, which I assume can only be put down to the onboard compass? I have my board mounted at least 3cm from any voltage wires or metal objects. And have had it placed 5cm beforehand, but because that made no difference I moved it back. Other boards like the DJI Wookong have the compass something like 15 - 20cm away from anything on its own, on my apm2.0 this is not possible as I have the daughter board with gps so I believe that option is not available to me? I will try and but some extension leads and place the whole board as far away as possible, but on my Tricopter it will be about 20cm up from the base so will look like a flying tower block, however I will try it and report back. If anyone one else has trouble with thier gps co-ordinates I would be gratefull to hear from them as mine are out by 20 miles and I have posted this problem a few times but never got an answer to help solve the problem.

Thanks Dean..

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Permalink Reply by Florian G on May 1, 2012 at 4:09pm

Hello Dean,

i seem to have a similar issue. I crashed my craft three tims up to now (i use crash bumpers, so usually nothing gets damaged). - See here:

http://diydrones.com/forum/topics/position-hold-mode-moving-aircraf...

Do you know any resolution ?

Cheers

Florian

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Permalink Reply by Xerravon on October 18, 2012 at 12:45pm

Have you guys found a solution to this loiter problem? mine is the same, or pretty close. mine really seems to go crazy after I hit the sticks to correct it. It will fight to go in the opposite direction that I move the sticks.

If you guys figured this out please let me know

thanks

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Permalink Reply by Marcelo Mustafa Murad on March 12, 2013 at 12:20pm

I used to have this problem and it always has been mag declination configuration. It changes values by itself. i think most of the cases it happens is when I switch batteries.

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Permalink Reply by Mike Mac on March 12, 2013 at 1:12pm

What I would suggest:

1. Turn off auto mag declination (COMPASS_AUTODEC = 0) and enter the number manually. Look up the number by clicking Declination WebSight under hardware options. COMPASS_AUTODEC = 0
2. Turn off COMPASS_LEARN and do a ground calibration (Live Calibration)

If that is better then you can try to turn them back on one at a time to see which one is the problem. If you turn COMPASS_LEARN back on and then off again you will have to repeat the Live Calibration. Or if you wrote down the old numbers you can put them back in.

　

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