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Unread 22-01-2016, 02:20
Tparbotmail Tparbotmail is offline
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Magnetic Field Impact on the NavX

Realistically how far away does the NavX have to be from the Motors and any other magnets on the robot? We really don't want to field test this one with by hovering the magnet close to the NavX. Will enclosures protect it?




http://www.pdocs.kauailabs.com/navx-...ked-questions/

"Aren’t the magnetometer (compass heading) readings unreliable when the navX-MXP is used on a Robot with powerful motors?

Yes, this is correct. If navX-MXP is mounted nearby any energized motors, the magnetometer’s ability to measure the (weak) earth’s magnetic field is severely diminished.

However, at the beginning of each FIRST FRC match, the robot is turned on for about a minute before the match begins. During this time period, the motors are not energized and thus do not add magnetic interference that would disturb the magnetometer readings. Once the magnetometer is calibrated, navX-MXP will return either an accurate magnetometer reading, or an indication that its measurement of the earth’s magnetic field has been disturbed.

Magnetometer readings taken at the beginning of a match, when combined with the navX-MXP yaw measurements, enable a robot’s pose and absolute heading to be maintained throughout the match. This feature of the navX-MXP is referred to as a “9-axis” heading."
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