Welcome to PhantomPilots.com

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

Yawing wide

Discussion in 'General Discussion' started by ccase39, Feb 17, 2015.

  1. ccase39

    Joined:
    Jan 3, 2015
    Messages:
    478
    Likes Received:
    17
    When I first got my Phantom It would yaw on a dime. I did an IMU calibration the other day and it has not worked right since. In addition to yawing wide I get a lot of travel in GPS mode. It doesnt just float forward or backwards. It will travel forward for a while and then maybe backward and kind of in circles. Really no ryme or reason to it.Compass is calibrated correctly before flight. I did another calibration yesterday and used a level to make sure my surface was legit with no help. I know that the level surface wont help if the IMU itself isnt level. I tried the shim method with no results.
     
  2. Mako79

    Joined:
    May 16, 2014
    Messages:
    3,491
    Likes Received:
    605
    Location:
    Sydney Australia
    Remove the top shell.
    The IMU calibrations doesn't need the compass.
    Use a physical bubble level as your phone app bubble may not be calibrated correctly (phone cases/protruding camera/etc).
    Place it directly on the IMU.
    Make sure its level in both/all axis.
     
  3. ccase39

    Joined:
    Jan 3, 2015
    Messages:
    478
    Likes Received:
    17
    And how do I level the IMU when I get to it? I may play around with the paper shims for a while before opening it up. Doesnt opening it void the warranty?
     
  4. Pmcdn

    Joined:
    Jan 26, 2014
    Messages:
    227
    Likes Received:
    0
    Location:
    Houston, TX
    Before doing too much, I'd be inclined to re-calibrate the compass but take it to a field or somewhere where ther isn't any risk of ferrous metal nearby to interfere.

    Then fly again and see if this makes a difference.
     
  5. ccase39

    Joined:
    Jan 3, 2015
    Messages:
    478
    Likes Received:
    17
    will do
     
  6. rexster314

    Joined:
    Dec 2, 2014
    Messages:
    144
    Likes Received:
    21
    Open the top up, you'll have to disconnect the GPS wire to remove the top shell completely. Plug in a USB cable into the bird's USB port. (so you won't disturb the leveled IMU later.) Put your spirit level on top of the IMU. Shim up whatever side/corner you need so the bubble level is correct. When you have the IMU level, plug the other end into your computer that has the Vision Assistant, go to Advanced and recalibrate the IMU. If you don't do the IMU, you're wasting time trying to level the bird. At least in my case...............
     
  7. Cyclone

    Joined:
    Feb 1, 2014
    Messages:
    550
    Likes Received:
    130
    Location:
    Essex, UK
Loading...
Similar Threads - Yawing wide Forum Date
Yawing problem Phantom 4 Pro Help Apr 23, 2017
waypoint yawing? Standard/4k Discussion Feb 3, 2017
Gimbal tilts in opposite direction when yawing right or left Phantom 4 Help Dec 3, 2016
Gimbal lags when yawing/panning Standard/4k Discussion Jan 13, 2016
H3-3D keeps yawing left (video) Zenmuse H3-3D/H4-3D GoPro Gimbal Jan 10, 2016