HiI have a quadcopter with a diy frame.I am flying in X-Mode using the Ardupirates software v1.1, Jan 24, 2011.I have GPS and magnetometer installed,the magnetometer is calibrated and I have entered the declination for my location.GPS is getting a signal and allows me to lock - I confirmed that it works correctly by entering the position found into google maps.The quadcopter flies perfect in stable mode.The artificial horizon in the configurator is stable and shows the correct heading (I checked with a conventional compass next to the quad).I observe the following:- if I activate GPS position hold the quadcopter starts to fly in a wide circle around the point, at which I activated the function.I did wait quite a while for the GPS to find satellites, before I took off for the flight.What can I do achieve a stable position hold?Did I miss something?Do I have to work on my position hold PID values? (if yes, what should I try?)Thanks for your helpFelix

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  • I have got a standard setup quad built from a kit using Ardupirates software.

    All seems to be working but I still have problems setting PID values.

    I have made several flights where things are reasonably stable but could be better.

    Altitude varies in hold and GPS hold does try to keep it in the area.

    Could anyone please publish their PID values for a standard quad - acro, stable, altitude, position hold etc.

    I seem to be going in circles literally and would be keen to see what values people have ended up with to get a stable results in the various flying modes.

  • the "MAGCALIBRATION help" thread should answer your question
  • change your declination to 0, check if it's getting better or worse

    if it's getting better i would invert the declination you had before

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