MR + GH4 slightly unstable

Discussion in 'MōVI MR' started by Ashley Fairfield, Sep 24, 2014.

  1. Ashley Fairfield

    Joined:
    Jul 26, 2013
    Messages:
    51
    Likes Received:
    5
    Does anyone have any suggestions on why I am getting small movements flying a GH4? I've had it working perfectly a couple of weeks ago but on the past half dozen flights I am getting small adjustments in flight. The signal does not appear to be dropping out. I am using Graupner for the Movi. I have tried using autotune. I have tried manual tune. I've rebalanced, checked all the plugs, tightened screws, flown just the camera and no cables attached. Each time I'm getting these small movements. See footage below.
    Cheers
    PW:GH4

     
  2. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
    Staff Member

    Joined:
    Jul 31, 2012
    Messages:
    10,351
    Likes Received:
    1,160
    G'day Ash:
    You're talking about those slight motions in tilt, right?

    Given you've checked/tightened everything else, I suspect you may need to email to support@freeflysystems.com.

    Andy.
     
  3. Ashley Fairfield

    Joined:
    Jul 26, 2013
    Messages:
    51
    Likes Received:
    5
    Thanks Andy, will do.
     
  4. Ashley Fairfield

    Joined:
    Jul 26, 2013
    Messages:
    51
    Likes Received:
    5
    The solution was to add some more weight to the camera tray. Adding a MoVI battery and using that to power the downlink has solved the problem. If anyone knows what I am doing wrong that I have to add a a bit of weight to the tray I'd love to know. As I said it was previously working fine without added weight so I'm not sure what I'm doing differently.
     
  5. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
    Staff Member

    Joined:
    Jul 31, 2012
    Messages:
    10,351
    Likes Received:
    1,160
    G'day Ash:
    That's interesting. Makes you wonder what has changed, doesn't it?

    Andy.
     
  6. Ashley Fairfield

    Joined:
    Jul 26, 2013
    Messages:
    51
    Likes Received:
    5
    Hey Andy,
    Yeah the footage always gave the feeling that the motors were searching for some tension to push against. I'm sure it's something I'm doing wrong or not doing. For now I'm just happy to have solid footage. Cheers.
     
    Denis Gliksman likes this.
  7. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
    Staff Member

    Joined:
    Jul 31, 2012
    Messages:
    10,351
    Likes Received:
    1,160
    Yeah, like the resonant mass had changed -- but it hadn't.

    Andy.
     
  8. matt ragan

    matt ragan New Member

    Joined:
    Apr 16, 2014
    Messages:
    22
    Likes Received:
    0
    did you find out what it was? i was having that same problem, Im not sure if it is fixed for good and would like to know
     
  9. matt ragan

    matt ragan New Member

    Joined:
    Apr 16, 2014
    Messages:
    22
    Likes Received:
    0
    Hello, did you figure this out? ive seen the same thing with a gh4 and m10. it doesnt do it all the time but its made me lose complete shots
     
  10. Ashley Fairfield

    Joined:
    Jul 26, 2013
    Messages:
    51
    Likes Received:
    5
    Hi Matt. I found using a heavier lens helped a lot. I'm now using a Tokina 11-16mm
     
    matt ragan likes this.
  11. Angus Benson-Blair

    Angus Benson-Blair Active Member

    Joined:
    Jan 23, 2013
    Messages:
    147
    Likes Received:
    25
    Ive never had properly smooth footage from light cameras on a Movi. I have tried all sorts of things and weight is definitely your friend here. I think the movement is caused by the downwash of the MR which, as it is not constant ie it buffets, it makes the job of the Movi very difficult indeed. Just me theory and would LOVE to be proven wrong.
     
    matt ragan likes this.

Share This Page