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Mounting the RevHub vertically

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  • #16
    The problem with those pictures is, they show you the little imu chip that's in the REV controller somewhere, but they don't show you its orientation within the controller. Its pretty clear that with the REV controller mounted horizontally, the imu chip is also horizontal (i.e., its z axis is up). But you don't know which directions are y and x. To find out, just run the BNO055 sample op mode. Start with the REV controller horizontal. Then tip it back and forth around one of its horizontal axes; If that gives you a change in "roll", then you are rotating about the y axis of the chip. If it gives you a change in "pitch", then you are rotating about the x axis of the chip. That's a very quick way of mapping out the x,y,z axes of the imu chip within the REV expansion hub.

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    • #17
      Originally posted by jkenney View Post
      The problem with those pictures is, they show you the little imu chip that's in the REV controller somewhere, but they don't show you its orientation within the controller. Its pretty clear that with the REV controller mounted horizontally, the imu chip is also horizontal (i.e., its z axis is up). But you don't know which directions are y and x. To find out, just run the BNO055 sample op mode. Start with the REV controller horizontal. Then tip it back and forth around one of its horizontal axes; If that gives you a change in "roll", then you are rotating about the y axis of the chip. If it gives you a change in "pitch", then you are rotating about the x axis of the chip. That's a very quick way of mapping out the x,y,z axes of the imu chip within the REV expansion hub.
      The REV Hub guide has a picture showing the location of the IMU inside it

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      • #18
        Originally posted by 4634 Programmer View Post

        The REV Hub guide has a picture showing the location of the IMU inside it
        This shows where it is, but it would have been helpful to add the axes orientation to the diagram. From testing, it looks like x & y are opposite of what we expected.

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