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Pixhawk autotoune fly away - it's gone

Posted by Rory Conolly on February 8, 2016 at 7:12pm

I built a DJI450 frame with the E305 motors and ESCs and Pixhawk FC and Taranis Plus RC. Started out with a 3s, 5,000 mah battery and had several good flights. Used Mission Planner autotune and everything seemed fine. Then switched to a 4s 5,000 mah battery. Had to lower the throttle midpoint to 325 as it was too twitchy otherwise. Started an autotune session. Went fine for about 10 min, at which point the quad shot straight up at what must have been full power and disappeared. I clicked out of autotune and tried to bring it back as it was in stabilize mode, but it was gone. Never saw it again. Building another one but am gunshy after what happened. Have added a Marco Polo tracker to the new one. Any thoughts/suggestions would be very welcome!

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Tags: pixhawk, taranis, dji
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  • Cala February 10, 2016 at 5:11pm

    Rory, after try autotune fly a little, like one minute in hover stab, then alt hold and land, check your log for err or vibes, etc. If all looks correct, then try autotune; telemetry and Tower or MP are main tool, as others said, specially on a new setup, It save me more than one time ;)

    • Tony K > Cala February 10, 2016 at 5:17pm

      I have had incredible success with pixhawk and the tarot 650 from day 0. But i hunted the forums for 3 months straight and learned everything i needed to know. Learned alot. I know Cala is a very active member you are getting some points from experience quad builders :) 

      Number 1 issue is vibration. KILL IT before it KILLS your drone.  LEarn to fly in stabilize well then switch to alt hold then loiter then RTL. If all works well then do auto tune. Thats how i did it. My drone is now ready for mapping. 

      • Cala > Tony K February 10, 2016 at 6:25pm

        +2 to Tarot 650 ;)

      • Rory Conolly > Tony K February 10, 2016 at 6:12pm

        @Cala, @Tony, thanks you guys.

        • Tony K > Rory Conolly February 11, 2016 at 4:46am

          ur welcome. this is what you need. dont let the price fool you. these have worked flawlessly for me. You have other options there too more expensive ones up to 50 bux that might be higher quality but the cheap ones are the ones i use.  You can then spend more on a high dBi antenna. Antenna gain term is misleading because antennas do not amplify so there is no actually amplitude gain however some antennas are better designed to propagate that signal in a specific direction more than other directions. That is the gain of the antenna. I have yet to reach limits on distance with these radios. Good luck. Dont give up :)  

          http://www.aliexpress.com/item/3DRobotics-3DR-Radio-Telemetry-Kit-9...

  • Tony K February 9, 2016 at 11:22am

    Also what is this marco polo tracker is it this ? 

    http://www.amazon.ca/Marco-Polo-Monitoring-Tracking-Locating/produc...

     Pet tracker ? $260      For a job that can be done much cheaper and easily with 20 dollar radios... that doesn't make much sense to me. 

    • Tony K > Tony K February 10, 2016 at 5:07pm
      @ tim thats what i was thinking but maybe he means some type of high gain that u can point all the time.. Not sure
    • Tony K > Tony K February 10, 2016 at 5:05pm
      10 dbi rubber duck antenna i bought on amazon. For 900mhz. Anyone whos using the 400mhz has even better options.
      • Cala > Tony K February 10, 2016 at 5:16pm

        Thank's Tony; I try with polarized 900 hz from Hobby king and I hope I ruined a radio :(

    • Tony K > Tony K February 10, 2016 at 3:28pm
      The chinese 915Mhz radios for the pixhawk telemetry work very well for kilometers. Like 4/5km if not more with a good gain antennas. The thing about these radios is that u kill two birds with one stone. You get telemetary and gps location of ur quad.. You can monitor all sensors and erros live on a tablet. Thats what i do. Not to mention planning auto missions and follow me feature with gps on the tablet. Its amazing. I would not bother with any other systems..
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