Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Difficult compass calibration and more

Discussion in 'Phantom 3 Help' started by KillerCut, May 12, 2015.

  1. KillerCut

    Joined:
    Apr 9, 2015
    Messages:
    134
    Likes Received:
    33
    I'm having a hard time with compass calibration. Never had issues with Naza or the inspire, but with the p3p I have to try like 5 times before its successful... indoors its almost impossible and it won't let me fly indoors 90% of the time... I also had 1 compass error mid flight, luckily it was just after takeoff so I just came back and redid compass calibration.
    2nd problem is getting the gimbal straight and level. Its almost level after a calibration, but it does change level throughout the flight. Also after some movement its not pointing straight, it went as bad to the point where I saw the landing gear in a GPS hover.
    3rd problem is that out of 5 flights I lost video and rc twice. The first time it was directly overhead at nearly 500m and coming in for a landing after I initiated rth, I got control and video back at like 120m. The second time I did not get control or video back and had to hand catch to prevent it from landing in sand, video and rc came back after I turned the p3 off then back on, and after reviewing video, it made a C'ish rth approach instead of coming straight to me and it flew over a 30m tall building, luckily my rth altitude is 50m...
    Firmware 1.1.6, still didn't get a chance to go to 1.1.8, iPad air 2
     
  2. Mako79

    Joined:
    May 16, 2014
    Messages:
    3,418
    Likes Received:
    568
    Location:
    Sydney Australia
    Re: Compass calibration.
    You doing this in an open field with minimal magnetic interference?
    When I do mine, I raise the P3 above my head and spin 360, then point the nose down and another 360. Raising it above your head makes it quick and accurate and minimises geomagnetic influences in the ground.

    Re: Tilt
    Check the IMU. Click > Mode GPS/ATTI > Click the Quad icon > Sensors.
    Maybe do an advanced IMU. But make sure you find a levelled surface, levelled with the horizon. Use a spirit/bubble level and make sure its levelled in all axis. If one of the axis is not levelled, you find that the phantom will NOT yaw on a dime.

    Re: Losing video
    If you are flying above your head, then flatten out the antenna. Point the tip of the antenna to the horizon (opposite of what's recommended). Makes sense?
     
  3. KillerCut

    Joined:
    Apr 9, 2015
    Messages:
    134
    Likes Received:
    33
    I will try compass calibration over my head next time.

    I did recalibrate imu, will try again.

    Antennas were about 45 degrees to the p3 when i lost signal the first time, flattening them out did nothing, it was like the p3 intentionally stopped transmitting/ receiving, as if its WiFi was shut off... The second time after I caught it, I had the p3 in one hand and the radio in my other and nothing...
     
  4. Robert Olman

    Joined:
    Apr 21, 2015
    Messages:
    21
    Likes Received:
    0
    I had the same issues with the compass. I could get the compass to calibrate just after warm up, but after take off, I would get out about 150' away at 60' altitude, and my status bar would go from green GPS to red compass error P-ATTI.I would return and attempt to recalibrate the compass, and never get it to calibrate, till I shut down the quad, and restarted it. I communicated for two days with DJI sending screen shots, etc. And they told me to send it in for repair. The turn around time would be 5 to 6 weeks. I called my distributor, and being the great people that they are, he had me send it back to him for a replacement, and he would deal with DJI.
    I guess that if DJI has a 5 to 6 week turn around, they must really have quality issues.
     
  5. KillerCut

    Joined:
    Apr 9, 2015
    Messages:
    134
    Likes Received:
    33
    Does your new one do compass calibration successfully easily now? Anyone else notice their camera not pointing straight even in a hover, or ever see the left landing gear?
     
  6. Robert Olman

    Joined:
    Apr 21, 2015
    Messages:
    21
    Likes Received:
    0
    I have not received my new one yet. I just sent it off yesterday. Sorry.
     
  7. KillerCut

    Joined:
    Apr 9, 2015
    Messages:
    134
    Likes Received:
    33
    Updated to 1.1.8, did imu calibration and then gimbal calibration after keeping it in the fridge for about 10 min, indoors I could not get it to do compass calibration, but I think there is 1 spot in my apt it might work. Took it to the park for 1 flight, I got compass calibrated after 2 tries...
    Had my iPad mini 2 in airplane mode, cell phone inside my car, I kept losing link at around 500m directly above me with antennas parallel to the ground. But I did manage to get it to 980m high while struggling to maintain signal. I accidentally discovered how to get it to go above 500m the other day, thankfully they didn't fix it in 1.1.8
     
  8. Mako79

    Joined:
    May 16, 2014
    Messages:
    3,418
    Likes Received:
    568
    Location:
    Sydney Australia
    Dude.... did I read it right??
    Do not do compass calibrations indoors. There is a high chance that it will confuse the compass. This is why you cannot get a successful calibration. Find an open grassy field free of any magnetic influences.
     
  9. KillerCut

    Joined:
    Apr 9, 2015
    Messages:
    134
    Likes Received:
    33
    I was only doing it so I could fly indoors, kept switching mode from opti to atti and going crazy.
     
  10. Mako79

    Joined:
    May 16, 2014
    Messages:
    3,418
    Likes Received:
    568
    Location:
    Sydney Australia
    Go outside in an open field and redo the compass. Then go back in the apartment.
    P-OPTI is vision positioning and no GPS. The modes switching back and forth is normal as it acquires/drops sats.
     
    #10 Mako79, May 14, 2015
    Last edited: May 14, 2015
  11. vincey2kr1

    Joined:
    May 11, 2015
    Messages:
    101
    Likes Received:
    14
    I get Gps lock indoors in p Mode and my p3 still wanders a bit, Im guessing its the vision positioning having troubles with my carpet and throw rug. Not worth the risk banging into a wall until i get better with the sticks :p
     
  12. YeeaaBoii

    Joined:
    Jan 5, 2014
    Messages:
    145
    Likes Received:
    7
    Location:
    Athens, TX
    Mine just started this issue today. It's first 5 flights were fine. Now it says to calibrate compass after each takeoff at a 5 foot hover and starts hovering in circles. It's like the optical sensors aren't doing anything to track the ground. I have flown it from the same spot every time. It also won't calibrate because it says "a high level of interference was detected during the calibration." Anyone had any luck fixing this issue?
     
  13. iahphantom

    Joined:
    Apr 9, 2015
    Messages:
    229
    Likes Received:
    91
    I had this issue as well ( compass calibration ) tried about 10 times. Failing each time. So I switched from my galaxy note 4 to my iPad air. Calibrated right away. Not sure if it was a coinsidence but the switch worked.
     
  14. Coldfire

    Joined:
    Feb 8, 2015
    Messages:
    203
    Likes Received:
    90
    For the record I use the note 4. I'm always able to calibrate my compass.