Welcome to PhantomPilots.com

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

Gimbal not level in flight

Discussion in 'Pro/Adv Discussion' started by pilotpeter, Apr 22, 2016.

  1. pilotpeter

    Joined:
    Apr 17, 2016
    Messages:
    36
    Likes Received:
    3
    What's the situation with a fix for the gimbal not level in flight. I have auto leveled that on the ground on a very flat surface as well as verify that the imu is calibrated but despite all that the gimbal at times, I should say most of the time is slightly askew. I have read in other forums this problem has been noticed by many. I have read that hitting auto calibrate in-flight sometimes helps. What does everyone think?
     
  2. Oso

    Oso

    Joined:
    May 19, 2015
    Messages:
    2,534
    Likes Received:
    1,480
    Location:
    Sacramento CA
    As you have probably seen in the dozens of related threads, horizon issues are too common.

    Is your horizon off by the same amount / angle all of the time? If so, a simple gimbal roll adjustment might help you if you have already done the proper calibrations.

    Does your horizon change during flight - tilting one way, then level, then tilting the other way as you yaw? If so, history has demonstrated that you probably wont be able to fix that particular issue without sending it in, and perhaps not even then. Most people who are not impacted by this issue will reply and tell you to do a cold IMU calibration (perfectly level!!!), gimbal roll adjustment, mid air gimbal calibration, it's the wind, it's the props, fix it in post, etc. All could be valid for a simple static horizon tilt. A random and dynamically changing horizon tilt is entirely different.
     
    alokbhargava and Ari like this.
  3. pilotpeter

    Joined:
    Apr 17, 2016
    Messages:
    36
    Likes Received:
    3
    Oso

    What have you done to correct it?

    My p3adv is only a month old too
     
  4. Phantom-Four

    Joined:
    Apr 12, 2016
    Messages:
    77
    Likes Received:
    20
    Before you did this, did you use a level tool to verify the surface was indeed level in all directions? Even floors aren't always level
     
  5. pilotpeter

    Joined:
    Apr 17, 2016
    Messages:
    36
    Likes Received:
    3
    I used my iPhone bubble level (in compass app). I'll redo it and verify level in all axis's. I've been doing the imu and auto level calibration for the Gimbal on my countertop.
     
  6. MikeyOnline

    Joined:
    Apr 22, 2016
    Messages:
    338
    Likes Received:
    116
    Just got my P3 Pro from Amazon 3 days ago and I've been through three flights. I've been through the IMU and gimbal calibration twice, both times on a perfectly level surface, and calibrated the compass. Yet the horizon is sometimes straight and sometimes not. To me it looks like an issue with "slop" in the gimbal mechanism because if I roll back and forth left and right, it sometimes corrects it but sometimes it doesn't come back to level: it's about 1 degree off. Adjusting the gimball roll seems to be a fruitless operation because if you level it when it's unlevel, it'll just roll the opposite direction next time. It's almost as if there's 1 degree of slop in the gimbal mechanism and it can't quite come back to level from a tilt (in one direction). I'll have a look at the mechanicals to see if anything looks "loose". Not a huge deal but would like to resolve it if I can.

    P.S. My first post too, so... hello everyone!

    Mike
     
  7. pilotpeter

    Joined:
    Apr 17, 2016
    Messages:
    36
    Likes Received:
    3
    Report back Mikey if you find anything
     
    #7 pilotpeter, Apr 22, 2016
    Last edited: Apr 22, 2016
  8. MikeyOnline

    Joined:
    Apr 22, 2016
    Messages:
    338
    Likes Received:
    116
    OK, I checked it out as thoroughly as I could. I don't see anything loose or any indication of any slop in the mechanism. I turned it on and rolled it, yawed it, and pitched it (on the table, not flying) and the camera seemed to stay level. Not sure what is going on that causes it to tilt a little while flying. I could be wrong but it looked like the camera wasn't perfectly level when you yaw the craft and the gimbal is slowly yawing the camera back to center. I wonder if the instances where I've seen an unlevel horizon occurred when I just went through a yaw maneuver and the camera was on it's way back to the forward POV. Not sure what else to check.

    Mike
     
  9. alokbhargava

    Joined:
    Sep 28, 2015
    Messages:
    5,136
    Likes Received:
    1,658
    Location:
    San Francisco, CA
    Did you turn gimbal to follow to off in DJI Go App.
     
  10. Oso

    Oso

    Joined:
    May 19, 2015
    Messages:
    2,534
    Likes Received:
    1,480
    Location:
    Sacramento CA
    Sorry for the delayed response.
    I've had the P3 for about a year and I have never been able to fix the drifting horizon.
     
  11. Roamer105

    Joined:
    Mar 10, 2016
    Messages:
    129
    Likes Received:
    25
    Check what the flight circumstances are when you see the horizon tilt. For example, I noticed that while the horizon is perfect when flying forward or backwards, it sometimes shows a noticeable tilt when flying sideways especially at higher speeds. Go one way sideways at 30mph, then go back looking the same way at the same speed. Compare the horizons. I think it has to do with the wind pushing against the side of the camera.