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Counteracting Yaw on KK2 Board

Discussion in 'Drone Electronics' started by yataka2, Oct 19, 2016.

  1. yataka2

    yataka2 New Member

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    Oct 19, 2016
    nowhere
    Posted by yataka2, Oct 19, 2016 #1
    I am flying a 550 size Quad with a KK2 Flight Controller on it.

    Flight control looks good with the exception that the Quad wants

    to immediately and continuously yaw to the left (counterclock wise).

    What parameter do I change to counteract this Yaw?
     
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  2. jamesb72

    jamesb72 Member

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    Feb 5, 2016
    Somerset, UK
    Posted by jamesb72, Oct 20, 2016 #2
    Have you checked receiver settings screen on KK2 and set trim or subtrim on tx to center at 0 (1500ms) ?

    Can you trim the yaw drift out or does it come back over time?

    Have you run acc calibration recently?

    Could one of the motors/esc be slowing which would cause the others to compensate and potentially get some yaw drift, check all motors spin freely unpowered, and bearings all feel smooth (no rough or notchiness, which would heat up in the air and bind), check the ESCs to see if one is hotter than the others (if you use a BEC in one it will always be warmer so don't worry about that) ?

    Lastly it could be vibration affecting yaw sensor, is everything (props/motors) balanced and running smoothly?
     
    Last edited: Oct 20, 2016
  3. theGreenOrange

    theGreenOrange Member

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    Oct 18, 2016
    Louisiana
    Posted by theGreenOrange, Oct 20, 2016 #3
    Hi guys,

    I am having a similar issue on my quad running Betaflight. The model on Betflight constantly yaws, even though the stick is at 1500 and a dead zone of 6. What is the best way to correct this? Should I just try to trim it out?

    Edit, this happens even when not flying, hooked up to USB. About 1 degree every 3 seconds.
     
    Last edited: Oct 20, 2016
  4. jamesb72

    jamesb72 Member

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    Feb 5, 2016
    Somerset, UK
    Posted by jamesb72, Oct 20, 2016 #4
    If it yaws on the bench it can only be gyro calibration or interference issue I'd think, I would recalibrate, and maybe try to move away from anything electronic which may be causing interference when calibrating (obviously as far as possible with cables etc).

    Failing that its possibly a faulty FC with a drifting gyro (is it a Naze32 or ??), as if you calibrate and yaw drifts on the bench with nothing running there aren't many other options, I've not had a bad gyro on a board but have read others have so thats definitely possible ;)

    You could try to trim it out, but I suspect you would just keep chasing it if its a gyro issue, so probably best to get to the root cause and fix/replace.
     
  5. theGreenOrange

    theGreenOrange Member

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    Oct 18, 2016
    Louisiana
    Posted by theGreenOrange, Oct 20, 2016 #5
    Thanks, I also think it must be the gyro. It is an El cheapo LHI copy of SP Racing acro. It is so slow, I am going to try to trim it out/live with it. We will see how it goes when I finally get to do my first FPV flying.
     
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