Welcome to PhantomPilots.com

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

Advanced Toilet bowl effect??

Discussion in 'Phantom 3 Help' started by AmosMoses, Jun 6, 2015.

  1. AmosMoses

    Joined:
    Mar 22, 2014
    Messages:
    597
    Likes Received:
    161
    Location:
    Illinois
    Here’s the skinny!

    I did and IMU calibration from a cold start. Put it on the most level surface I could find. My pool table, I did a compass calibration. You know all the usual stuff. Calibrated the TX too, when I’m about 5 to 15 feet off the ground the P3A will rotate in about a 4 foot circle? It will steady out if I climb but it definitely wants to wander when I’m close to the ground.

    I usually fly with the VPS off and noticed that if I turn it on it will slow the rotation a bit but doesn’t stop it. I’ve gone to a couple different spots to see if there may be something in my area that’s causing some interference with the compass but with the same results.

    I always get at least 17 sats and seen as high as 20 so I’m in a good area for sat reception. Any thoughts from the experts?? J
     
  2. RoyVa

    Joined:
    Apr 10, 2015
    Messages:
    2,246
    Likes Received:
    449
    Location:
    Virginia
    Did you do the compass calibration outside? Did you RC sticks center on the calibration? I would recheck those two. Also look at the calibration info in the assistant to see if it calibrated with specifications. If not re do it.
     
  3. walshoptics

    Joined:
    Jul 10, 2015
    Messages:
    1
    Likes Received:
    0
    Did you ever get this issue resolved? I flew my Phantom 3 today for the first time, and I noticed the exact same thing occur. If I flew higher, the issue resolved, but when lower than roughly 10 feet off the ground, it would start to swing in a circle about 4 feet in diameter (it didn't happen every time, only a few times out of maybe 6 when I was at that altitude). I had 20 sats locked at the time.
     
  4. Bratinov

    Joined:
    Apr 5, 2015
    Messages:
    46
    Likes Received:
    4
    Ï got the exact same thing today, P3P... couldn't land.
    When I went up`higher the circling stopped.
    I was finally able to bring it down low enough to hand catch when I moved 50 meters away from my initial position. (the circling stopped at my new location)

    I have flown at this location before without issues (its a bridge).
    I calibrated the compass on my first flight today, it was around 300 meters away from the bridge, didn't the second time (maybe that's it?)
     
    #4 Bratinov, Jul 17, 2015
    Last edited: Jul 17, 2015
  5. BigKenny

    Joined:
    Jul 13, 2015
    Messages:
    77
    Likes Received:
    20
    Location:
    Minneapolis
    Could be something with the vision positioning system? What kind of surface were you over?