Welcome to PhantomPilots.com

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

altitude fluctuates wildly setting still

Discussion in 'Phantom 2 Vision + Help' started by Keith Shaffer, Dec 27, 2015.

  1. Keith Shaffer

    Joined:
    Dec 4, 2015
    Messages:
    5
    Likes Received:
    0
    After a hard landing, I am having issues with out of control flight. Bird goes up and down with no movement of sticks. Would crash if I didn't over ride what it is trying to do. I didn't think I was going to get it down. I was calling it down and it would descend a bit, go back up, start coming down until I could finally grab it. Setting on the table I can watch the altitude fluctuate. It starts out not so bad. 5 to 6 feet, but after a minute or two it will range from 27' to +60', down to -150', back up to 50', down to -200' and so on. I have done a advanced IMU calibration several time "with unit cool", & calibrated compass. After my last flight, I not sure if my hard landing caused this issue, or this issue caused my hard landing?
    Any suggestion? I am stumped!!!!
     
  2. Daytona

    Joined:
    Dec 6, 2015
    Messages:
    31
    Likes Received:
    3
    Location:
    Port Orange
    Bad GPS or altimeter would be my guess.
     
  3. Keith Shaffer

    Joined:
    Dec 4, 2015
    Messages:
    5
    Likes Received:
    0
    I thinks the GPS is mounted under the cover? Were is the altimeter? After doing some digging it sounds like I may need to install a new Naza-M module. I have my bird apart, and found the Naza-M module, however, I am not sure how its attached. It looks as if is glued some how to the main circuit board. I am still hoping it is something more simple than this!
     
  4. Daytona

    Joined:
    Dec 6, 2015
    Messages:
    31
    Likes Received:
    3
    Location:
    Port Orange
    GPS is in the top cover between the plastic and foil shield. If the ceramic antenna is cracked its bad.
    As for the ALT I do think its part of the NAZA unit. YouTube has video's showing the disassembly
     
  5. N017RW

    Joined:
    May 2, 2014
    Messages:
    7,007
    Likes Received:
    1,944
    Location:
    Palm Beach Co.- FL
    No altitude data from GPS.

    Likely a bad IMU which contains the barometer.
     
Loading...
Similar Threads - altitude fluctuates wildly Forum Date
constant relative altitude using Autopilot Phantom 4 Pro Help Wednesday at 6:18 AM
90m altitude - weak/no signal? Standard/4k Discussion Sunday at 11:57 AM
Litchi/P4P - Guaranteed altitude at waypoint? Control (Go, Litchi, etc..) May 17, 2017
Phantom 3 video lost after 30 m altitude Standard/4k Discussion May 10, 2017
Getting Metedata Beyond EXIF? Long Lat Altitude Camera Angle General Discussion May 9, 2017