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IMU broken? (XY-gyro only gives minimal values).

Posted by Krokodil on February 1, 2011 at 1:58pm

Hi all.
I´m using the ArduCopter with the RC2 code.
When I connect to the Configurator the gyros for the roll/pitch does not move more than from -1 to 2.
The yaw gyro works at it should.
I have not yet flown with the quad, only assembled it, but I guess it would be stupid to try and fly it without working gyros.
Could the gyro be broken even though it shows movement (but only a little). How can I test this more thuroughly?

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Tags: arducopter, gyro
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Replies

  • 3D Robotics
    Chris Anderson February 5, 2011 at 2:18pm
    I suggest you contact the DIY Drones store and arrange for a return.
  • Developer
    Jani Hirvinen February 3, 2011 at 8:19am
    have you made any hand tests to see how it actually responds on roll/pitch moves??

    Gyro outputs are those first ones on row (don't care other numbers on my output, they look crazy as they should)
    As you can see on first few lines values are close to 0 and after i start to roll/pitch, values are getting over -+100 while maximums are somewhere over 400.

    0,1,0,-1,0,0,0,0,0,0,0,0,2000,-2081,2464,0.0000,0.0000,0.0000,0,0,0
    0,2,0,-1,0,0,0,0,0,0,0,0,1999,-2081,2460,0.0000,0.0000,0.0000,0,0,0
    0,1,-2,-2,0,0,0,0,0,0,0,0,2000,-2082,2461,0.0000,0.0000,0.0000,0,0,0
    0,1,-4,-1,0,0,0,0,0,0,0,0,2000,-2079,2462,0.0000,0.0000,0.0000,0,0,0
    0,1,-2,-1,0,0,0,0,0,0,0,0,1998,-2079,2466,0.0000,0.0000,0.0000,0,0,0
    0,1,1,0,0,0,0,0,0,0,0,0,2001,-2080,2466,0.0000,0.0000,0.0000,0,0,0
    0,1,0,0,0,0,0,0,0,0,0,0,2001,-2080,2463,0.0000,0.0000,0.0000,0,0,0
    0,3,0,0,0,0,0,0,0,0,0,0,2002,-2081,2460,0.0000,0.0000,0.0000,0,0,0
    0,-3,-3,-1,0,0,0,0,0,0,0,0,2003,-2080,2467,0.0000,0.0000,0.0000,0,0,0
    0,-1,0,-1,0,0,0,0,0,0,0,0,1999,-2076,2461,0.0000,0.0000,0.0000,0,0,0
    0,1,-18,1,0,0,0,0,0,0,0,0,1998,-2072,2461,0.0000,0.0000,0.0000,0,0,0
    0,-20,-74,6,0,0,0,0,0,0,0,0,2013,-2070,2459,0.0000,0.0000,0.0000,0,0,0
    0,-37,-111,2,0,0,0,0,0,0,0,0,1993,-2031,2445,0.0000,0.0000,0.0000,0,0,0
    0,-39,-84,-12,0,0,0,0,0,0,0,0,1975,-1988,2464,0.0000,0.0000,0.0000,0,0,0
    0,52,80,-6,0,0,0,0,0,0,0,0,1944,-1948,2479,0.0000,0.0000,0.0000,0,0,0
    0,72,165,17,0,0,0,0,0,0,0,0,1995,-2014,2485,0.0000,0.0000,0.0000,0,0,0
    0,49,182,23,0,0,0,0,0,0,0,0,2017,-2081,2461,0.0000,0.0000,0.0000,0,0,0
    0,40,123,16,0,0,0,0,0,0,0,0,2029,-2154,2428,0.0000,0.0000,0.0000,0,0,0
    0,28,-8,14,0,0,0,0,0,0,0,0,2046,-2181,2415,0.0000,0.0000,0.0000,0,0,0
    0,-25,-112,4,0,0,0,0,0,0,0,0,2065,-2148,2446,0.0000,0.0000,0.0000,0,0,0
    0,-73,-136,-17,0,0,0,0,0,0,0,0,2039,-2098,2458,0.0000,0.0000,0.0000,0,0,0
    0,-49,-70,-29,0,0,0,0,0,0,0,0,1995,-2042,2475,0.0000,0.0000,0.0000,0,0,0
    0,-72,15,4,0,0,0,0,0,0,0,0,2002,-2023,2531,0.0000,0.0000,0.0000,0,0,0

    Try hand tests and let us know.
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