roll problem in helicopter

Discussion in 'MōVI M5' started by paolo forti, Jul 22, 2014.

  1. paolo forti

    paolo forti New Member

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    Hello guys, today i flew with helicopter for some shooting with an M5 with Canon 5D mk3, left door open, and i noticed that when we flew at 80 Mph the roll axis was wrong about 5 - 7°, pan and tilt followed perfectly.
    If we flew at 40 -50 Mph roll axis was perfect.
    Any solution?
    thanks in advance.
    Paolo
     
  2. Hideo Matsuda

    Hideo Matsuda New Member

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    Hello
    Let me share information
    I am troubled by the same symptom, too
    The symptom of for some reason this malfunction
    I do not seem to be recovered
    I do not sometimes appear with time to appear
    What is a model of the helicopters?
    I have many these symptoms in Robinson R44
    When it is airbus AS350, it sometimes becomes
    My measures of the present
    Put a trim of Radio System Futaba14SG
    I wire it TrainerCable
    Do you match stability forcibly?
    You slow down, and fly stability linearly
    I take a reboot
     
  3. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Paolo and Hideo: This sounds like the problem caused by the fact that gravity and acceleration are indistinguishable (according to Einstein, but what did he know! :) ) -- so if you are accelerating the MōVI sideways, the gravity vector (the direction in which gravity seems to be coming from) tilts over and thus the MōVI's sense of which way is "down" is also tilted over.

    I don't know whether the MōVI's gimbal control unit is supposed to compensate for this (or whether it even can figure out how to compensate for this), so I'll have to leave that for someone at FF to comment upon.

    Andy.
     
  4. Ozkan Erden

    Ozkan Erden Distributor

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    GPS is supposed to fix this issue. I think the algorithms should improve for a better roll performance. On some occasion, I get severe roll drift even on my cinestar 8 and Movi's even I get full satellite lock on Movi.
     
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  5. Hideo Matsuda

    Hideo Matsuda New Member

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    Hello,
    Being caused by acceleration gravity
    It can be understood
    Is there not the solution to this problem now?
    Is it possible? full satellite lock on Movi.
     
  6. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    We will need someone from Freefly to comment, Hideo-san.
    Gary and I are volunteers not Freefly employees. Sorry.

    Andy.
     
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  7. Andrew Griffiths

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    I'd be interested in an answer on this too. Can anyone from Freefly comment?
     
  8. Christer Dahl

    Christer Dahl Member

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    This is what gps assisted gimbals is suppose to take care of.
    Would like to know the answer to this too, any updates in fw in regards to this since last time?

    Thx
     
  9. Ricardo Aguerre

    Ricardo Aguerre New Member

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    Hi,
    I've been flying in a r44 for a few days and I had the same problem, my m5 can't handle any gentle turn without losing the horizon. Needs more than 20 seconds to recover. We always keep speed between 30 and 50 knots at most.

    I've never flown the movi in a multirotor, but I guess that g forces are stronger in my octocopter.

    Please check this video

    Any ideas?
    thanks.
     
  10. Christer Dahl

    Christer Dahl Member

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    The video looks a little shaky in some scenes as well...
    Are you shooting through the canopy, or out the door? Handheld or bungees?
    What setup are running, camera/lens?
    Whats the gps status before takeoff, how man sats on ground and how many in air?
    I suspect insufficient gps coverage inside the cockpit...
     
  11. Ricardo Aguerre

    Ricardo Aguerre New Member

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    I was shooting with the movi handheld pointing forward with gh4+12mm olympus lens.
    Vibrations probably came from my left arm contacting the airframe.
    I didn't check satellite status before takeoff.
    From inside the r44 it happens the same (out of rotor wash or relative wind). Captura de pantalla 2015-06-17 a las 21.20.17.png
     
  12. Christer Dahl

    Christer Dahl Member

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    Have you activated the log function?
    Le me know how many sats you have next time...
     
  13. Christer Dahl

    Christer Dahl Member

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    Btw, i would secure the rig next time with a strap, you never know what suddenly might happen, and it would be bad if you suddenly lost the grip ;)
     
  14. Hideo Matsuda

    Hideo Matsuda New Member

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  15. Christer Dahl

    Christer Dahl Member

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    Any of you guys been in touch with Freefly support regarding this?
     
  16. Hideo Matsuda

    Hideo Matsuda New Member

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    My M10 is the first lot
    The Japanese agency copes properly and
    I sent it back to the United States and checked it
    However, the same symptom still comes out in the helicopter
    Unfortunately these machine parts have a limit
    It must become the change of the Shotover
    I understand
    You manage it well, and want to be
    I study it
    I wish Freefly support
     
  17. Cody Hanthorn

    Cody Hanthorn Member

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    I was told they have a roll problem. In these scenarios the problem exist only? I would think being broadcast-ed as a top gimble to get for someone like me that is looking to purchase one and finding a really big problem that this would be a really big object to get fixed. I found it on the forums in January. Looks like its a tough issue or not addressed?
     
  18. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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  19. Cody Hanthorn

    Cody Hanthorn Member

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  20. Christer Dahl

    Christer Dahl Member

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    Would it be possible to solve this and get confirmation on any solution?
    I got a big job coming up, and would not be very happy if 10 000$ in heli costs is blown by a non working gimbal...
    Thx!
     

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