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Erratic behavior of ardupilot controlled quad

Posted by Rnold on May 21, 2014 at 12:21pm

I am trying for several weeks now to persuade my arducopter controlled quad to fly. That is not succesful due to erratic turning motors. It appears that each motor has its own speed that constantly varies, even when the thing is standing on the ground. Sometimes a motor just stops while the rest keeps turning: see this video.

I checked all inputs and outputs but couldn't find anything. Using a DJI flame wheel with Opto ESC's (these can't be calibrated) and DJI 920 KV motors. This is the original DJI F450 setup. In fact, everything works when I replace the Ardupilot by the Naza controller. Maybe the Ardupilot is defect?

I am at a loss what to do. Does anyone has some ideas what I am doing wrong? Any help is greatly appreciated!

Arnold

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Tags: arducopter, behavior, erratic, motors
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Replies

  • Rnold June 18, 2014 at 1:16pm
    I discovered that the arducopter was not correctly calibrated. The HUD showed incorrect information./ After I calibrated the Accel settings the HUD was correct and the quad could fly around in my appartment. It wobbles a bit But that seems to do with the PID settings. That's for the next project :-)
    • Alan D > Rnold June 18, 2014 at 2:57pm

      I just took a screenshot of the PIDs i'm using for someone else.

      Try these and see if it's more stable (see attachment).

      Quad PIDs.jpg

      • Rnold > Alan D June 19, 2014 at 1:45pm

        Thanks for the screenshot! I'll be flying in the wild this weekend so I can check whether it *really* flies. Your parameter settings might come in very handy.

        Regards,

        Arnold

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