orientation-of-the-enclosure

 

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Questions and Answers › Category: Moitessier HAT › orientation-of-the-enclosure
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Antti asked 6 years ago

Hi, The best location for the pi & hat (in terms of electrical & magnetic disturbances) would be on a cabin wall or ceiling. Does the orientation of the enclosure matter? Can the IMU be calibrated & compensated no matter what the orientation is? I will be using an external GNSS antenna. Best regards, Antti

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Thomas Staff answered 6 years ago

Hello Antti,
the orientation does not matter. Pitch and roll are compensated by the “boat is level” setting in OpenPlotter. Then, you have to calibrate and afterwards you can compensate the heading by defining a heading offset. For more information on this topic see https://docs.sailoog.com/openplotter-v1-x-x/pypilot/compass-calibration

Regards,
Thomas

Maarten replied 5 years ago

Hi Thomas,

I find that if I mount the HAT vertically against a bulkhead (so the antenna connectora point stright down, the ‘bottom’of the board faces aft, the chips facing forward, my compass loses sense of direction.
When I now lift or drop the nose I see very big (50 degrees or more) variation in magnetic heading.
It seems that the R2 version of the HAT needs to be mounted ‘normally’?
Thanks!

 

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