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Old Sep 15, 2013, 01:49 PM
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That is good info, I will try that. Thanks.
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Old Sep 15, 2013, 11:55 PM
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I also made sure that the magnetometer was placed up high away from all electromagnetic interference. Sometimes the motors and wiring can cause the magnetic field to deviate slightly when the wires have current running through them. You can check for this error by observing the OSD. Observe the heading on the OSD with the motors off. Then observe it while the motors are running. If it changes heading when you activate the motors you have an EMI problem. All multirotors can potentially have this EMI interference with the magnetometer. Magnetometer deviation and poor alignment will lead to the toilet bowl effect or worse.
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Old Sep 16, 2013, 07:55 AM
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The EMI problem can be countered by having a small Grounded Faraday shield under the area your trying to protect.
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Old Sep 16, 2013, 12:25 PM
USA, CA, Mountain View
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Carbon fiber/birch core sheet http://dragonplate.com/ecart/categories.asp?cID=3# will also shield the mag from emf and is a bit lighter than copper sheet. Cuts with heavy duty shears. I use it along with plastic fasteners and can mount the mag directly to the top plate with no extension.
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Old Sep 17, 2013, 05:49 AM
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Would something like this solve or deminish EMI problem?
http://www.banggood.com/Wholesale-1-...2-p-49790.html
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Old Sep 17, 2013, 08:32 AM
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Quote:
Originally Posted by panin View Post
Would something like this solve or deminish EMI problem?
http://www.banggood.com/Wholesale-1-...2-p-49790.html
Yes it would as long as it's grounded. But I was thinking. It might be a little tough to ground, but Aluminum tape might also work. The tape I'm talking about is what AC people join hard ac ducts with.
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Old Sep 17, 2013, 01:40 PM
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Ground it how? By soldering one of the black wires from the pow distr board to it?
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Old Sep 18, 2013, 07:58 AM
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Quote:
Originally Posted by panin View Post
Ground it how? By soldering one of the black wires from the pow distr board to it?
I don't know how you would ground anything Aluminum, but ground it to the Battery ground.

As for carbon fiber, I know Carbon is conductive, but I didn't know carbon fiber sheet was a barrier to EMF.

If carbon fiber will block a magnetic field, then it might work. The best thing I have found is the fine mesh copper screen, and you can solder that. But whatever you use, needs to be grounded to the battery ground.
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