Another Cinestar 3 axis Brushless mod

Discussion in 'Camera Mount Misc' started by Brad McGiveron, Jun 18, 2013.

  1. Bill Collydas

    Bill Collydas Active Member

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    Yes they do especially with the Epic, I got them from Tarot.
    Bill
     
  2. Bill Collydas

    Bill Collydas Active Member

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    Here you go, is a small clip
     
  3. John Gore

    John Gore Member

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    We recently built a brushless gimbal specifically for RED Epic / Scarlet. 2 axis brushless, with the pan using servo with belt reduction and radian. Results were pretty good, but at times one can see a small amount of unwanted movement on pan. The pan only starts to look "bad" because the tilt and roll are so very very good with brushless.

    We used 8017-120t iPower motors for tilt and roll on Alex Mos. FreeFly servo + radian on pan.


    https://vimeo.com/dronecrew/international-commercial-red-scarlet

    Small clip from the RED at the end, coming home to land (cant share the actual shots as this was on a paid commercial).

    Busy adding brushless pan over the next few days. Just sharing here to show that radian + servo on pan option is a good one, if you already have radians.
     
  4. Brad McGiveron

    Brad McGiveron Active Member

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    An update to the start of this thread which I posted a real hillbilly mod of the Freefly gimbal which worked surprisingly well for handheld and some aerial shots with Epic or Scarlet and a light lens.
    Anyways... I just shot a car commercial which I am directing and by chance had a aerial shot in it:D
    While out there I ran a couple of outtake passes for my own personal use.
    This is with a much more refined version of the gimbal mod I originally did but now with cage type motors holders and all carbon fiber construction as well as a few printed parts.

    Epic 5K with CP 2 35 and Bart FF.
    Alexmos 3 axis with 8017's
    Freefly 360 gimbal
    Cinestar X8

     
  5. Ozkan Erden

    Ozkan Erden Distributor

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    Brad, very nice.

    How does you pan react when flying? How much volts do you supply to the motors?
     
  6. Brad McGiveron

    Brad McGiveron Active Member

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    Ozkan, 4s here on this.

    The pan still at times has a few minor issues but really only in fast movements. Otherwise in slow orientation changes it runs very nicely.
     
  7. Bill Collydas

    Bill Collydas Active Member

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    Brad very nice indeed. That's what Im talking about, convert your cinestar to a brushless and you got your self a nice gimbal.
    @Brad
    Are you using direct drive for the pan or belt reduction?

    Bill
     
  8. Brad McGiveron

    Brad McGiveron Active Member

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    Thanks Bill... yes so true indeed.

    Yup still belt reduction on the pan.
     
  9. Bill Collydas

    Bill Collydas Active Member

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    Awesome..thanks
    Bill
     
  10. John Gore

    John Gore Member

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    Did you try direct drive on pan yet? Do you plan to? 8017 should be more than strong enough, no?
     
  11. Kenny Blum

    Kenny Blum New Member

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    Anyone having issues with cogging on a 3rd axis with gear reduction? I added a 32t pulley to the motor and using the original belt and pan pulley on the frame. I can't seem to fix the issue. The notchy rotation is really an issue.
     
  12. Bill Collydas

    Bill Collydas Active Member

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    Is it notchy when you turn it by hand or when is working on its own?

    Bill
     
  13. Brad McGiveron

    Brad McGiveron Active Member

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    have you modified your pole count for the motors in the bgc GUI?

    match gear ratio X poles = GUI motor pole setting.

    Just something to try :)
     
  14. Kenny Blum

    Kenny Blum New Member

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    It is notchy with and without power and trying to stabilize.

    Yes, I have tried adjusted the poles to match the gear ratio with no change.
     
  15. Brad McGiveron

    Brad McGiveron Active Member

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    What motors are you running ?
     
  16. Bill Collydas

    Bill Collydas Active Member

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    I'm running belt on all the gimbals I build.
    Three have the 5208's and one the 5108. Using 32t pulleys and standard CS wheel.

    No notching at all and I don't change the pole count I leave it at 14 poles and works fine.

    Bill
     
  17. Katya Nelhams-Wright

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    Hi Brad
    Really lovely and makes me wish I owned Red. Have the brushless gimbal so heading in the same direction:)
    I have followed your posts about converting to a coax and wanted to ask you if you are happy with it or would you go back to a flat 8....pondering the coax route myself and looking for an honest opinion on it.
    Thanks and look forward to more footage:)
    Kat
     
  18. Brad McGiveron

    Brad McGiveron Active Member

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    Yes... that is a difficult question for sure. Probably answered more by what you are shooting then anything else.
    I now don't own a single flat but I have been thinking about one again since brushless works as we would expect.
    I guess I would say that if you need to fly longer, furthur and you fly in a calmer wind area then a flat is pretty much what you want. If you want to be as stable as possible and require faster climbs and descents like a jib can do then a coax is the probably the best. Probably one of each is ideal.

    Either has its pros and cons but in general the only real con for flat is turbulence whether it be wind or disturbed air via the props. Coax cons are more power needed, and less flight time.

    I have never needed super long flights and prefer the handling of the coax and am willing to throw more power and batteries at the setup to get ok flight times. Still they end up 20-30% less with some big loads and if you can live with that its a great system.

    So to sum it up... I am happy but its just different and a different tool almost.
     
  19. Jose Luis Ocejo

    Jose Luis Ocejo Active Member

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    Hi to all has anyone try on the pan on a MR DSLR setup the 5108 120T 24 pole motor instead of the 5208 150T motor 14 poles motor the 5108 suppose to be a stronger motor
    thanks
     
  20. Katya Nelhams-Wright

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    Thanks Brad:)
     

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