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I have an absolute magnetic shaft encoder. I want to use it in order get the azimuth angle of that a motor. I want get values from the encoder but I want to know it is aligned to the magnetic north or it is irrelevant?

So if the 0 angle at the shaft encoder I have to do a manual calibration with a magnetometer and add or subtract my magnetic declination.

I am going to use a magnetometer to check it but I was wondering if there is a standard answer for all these devices.

dfeuer
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kyrpav
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  • I'm voting to close this question as off-topic because it is about machine calibration, not computer programming. – dfeuer Jan 23 '15 at 20:13

1 Answers1

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The magnet inside the encoder is surely much stronger than earth's magnetic field. The motor you connect to the encoder will be generating a magnetic field. Interference from earth is not the first of your concerns.

You don't need a magnetometer to convince yourself of this, just pick up the entire encoder, rotate it, and see if the reading changes.

jdr5ca
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