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Could use some help and answers please!

Discussion in 'Phantom 2 Help' started by kimalia, Jul 6, 2014.

  1. kimalia

    Joined:
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    Hey guys!

    I accidentally turned of my dji phantom 2 off in mid air but managed to turn it back on to make the impact less brutal. Still the crash did some damage and i dont know whats really broken. maybe if i mention the things i know, then someone else could tell me what else is broken.

    *basically after crashing i turned it back on, but now one of the 4 propellers doesnt stay in idle mode, it starts of in full speed.
    * one of the landing pads/legs are a little curved now, but that shouldnt do anything to the sensor on the leg, right? (im not sure what it is on the leg. sensor/gps/idk.)
    *after removing the battery and connecting it again. the led now shows RED, GREEN and YELLOW. (AKA. sensor error?)
    *the assistant software says the IMU initialization is failing, which i also dont know what is.
    *tried to advance calibrate it, but its been doing it for 2 hours now and doesnt seem like its doing anything.


    please if someone knows what im dealing with and hwo to fix it, please let me know! :)
     
  2. J Dot

    Joined:
    Apr 10, 2014
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    Location:
    Sarasota, FL. USA!
    Hello,
    Sorry to hear about your misfortune!
    The sensor on the leg is the " COMPASS "
    The " IMU " is "INERTIAL MEASUREMENT UNIT "
    The IMU Takes readings from
    1) accelerometer ( motion ( forward-reverse, up-down, and side-side )
    2) Gyroscope ( spinning motion )
    3) GPS ( where you are in magnetic earth )
    The IMU takes these readings on ( 3 ) axis
    ( hence ) x, y, z axis, and creates an ACTUAL VALUE AVEREAGE
    of these readings ( hence ) MOD OR ( MODUUS MEANING actual value )
    Typically you hook phantom to assistant, take note of values ( MOD )
    If any of these are WRONG, you do an IMU CAL.
    Here is the breakdown:
    Compass = ( 750-2250 )
    Gyro = ( 0.0-1.5 )
    Accelerometer = ( .98-1.02 )
    If any #'s are wrong IMU calibration needed!

    Typical procedure in case of crash
    1) open phantom, inspect ALL connections
    A) loose connections
    B) broken solder joints
    C) broken/damaged components
    2) perform ADVANCED IMU calibration
    3) perform Tx ( remote ) calibration
    4) compass calibration

    Keep phantom LEVEL AND STABLE ( side-side, front-back )
    When doing IMU calibration ( no wobbling around, good and stable )
    ( wood table NOT METAL )

    Hope this helps
    Take care, Fly safe!