Converting my CS gimbal to a brushless gimbal

Discussion in 'Camera Mount Misc' started by Bill Collydas, Apr 14, 2013.

  1. Bill Collydas

    Bill Collydas Active Member

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    Loic.
    You can try here they have a good selection and great service.
    brushlessgimbals.com
    Bill
     
  2. Bill Collydas

    Bill Collydas Active Member

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    Is been a while since I posted here.
    Been busy and all.
    But here's a very small video of the drone and belt drive system I built for a client of mine..


    Bill
     
  3. Noel Zinger

    Noel Zinger New Member

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    Congrats Bill, very nice build.

    Noel
     
  4. Urs Clement

    Urs Clement Member

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    Nice one Bill!

    Has anyone ever tried the GB100 for pan? I've just installed the belt drive, and i don't really like it. My sliprings don't fit inte the shaft, i have no "holes" on top to connect the video signal to the drone etc... And i'm building a heavy lifter, i wouldn't have problems with the additional weight. Using a GB100 (+130g compared to the 8017) with 5s LiPo, without the belt system wouldn't even be that much heavier...
    Anyone tried this?
     
  5. Bill Collydas

    Bill Collydas Active Member

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    I use the GB-100 on the pan for a handheld rig.
    And GB-85 on a aerial rig.
    I don't really know how the GB-100 will handle the pan on an aerial platform. I know the GB-85 works.

    Bill
     
  6. Urs Clement

    Urs Clement Member

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    up to what weight did it work for you? My Gimbal is about 5.8kg (including the pan motor itself and legs)

    And how is the GB100 on the handheld? Is it really that strong? :)
     
  7. Bill Collydas

    Bill Collydas Active Member

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    The 100 works well but, there's no cages for the 100. I had to extend the GB-85 cage legs in order to make it fit.
    GB_100.jpg
     
  8. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Wow, Bill. That's not a brushless motor powered gimbal so much as it is a honking great motor with a wimpy gimbal attached for the ride. :)

    Andy.
     
  9. Urs Clement

    Urs Clement Member

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    Cool Bill! Thx for that image....

    I'll use the bearing and shaft from the normal GB85 motor cage and draw & mill a new cage in the standard 3 leg design for the GB100....

    Would you mind sharing the PIDs u use for a gimbal (at arout 5.5-6kg)? With 42 poles i end up with values lower than 6 for P.....
     
  10. Nicolas Wilhem

    Nicolas Wilhem New Member

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    Hi everyone,

    I converted my cs gimbal to a brushless with alexmos. My question is :
    Is it possible to connect the yaw motor directly into the receiver?

    Thank you.
    Nicolas
     
  11. Urs Clement

    Urs Clement Member

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    No, it's not possible.... Every motor needs a "driver", normally an ESC, on BLGs the Alexmos does this job. The reciever can't power a motor, and even if it could, it wouldn't know the gimbal's attitude.
     
  12. Bo Tornvig

    Bo Tornvig Member

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    Hi Guys,
    Do anyone have experience with the GMB5208-75T motor? The spec says that it's good for a 2500g camera..?
    Cheers
     
  13. Bill Collydas

    Bill Collydas Active Member

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    Ordered some GB-90 motors.
    I will try another gimbal building method for aerial and see how it works.
    They say they are good for 10kg's and 6S


    Bill
     
  14. Ryan McCrae

    Ryan McCrae Member

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    Hi guys, I posted this on the Alexmos 8 bit forum on rc groups as well, hopefully some one here can help.

    Im having issues tuning my roll axis, pan and tilt are great, but i can't seem to get rid of the wobble in roll. Im using a cinestar 3 axis converted to brushless carrying a gh3 with ilfight 5108 motors on pitch and roll. Here is a sample video filmed last night, it was windy gusting 30km or so. But it does the same thing on a calm day when you flight with a bit of speed.

    The settings for roll are:
    P: 35 I:0.1 D:28 & Power:170

    Im running 2.4b6 firm wear.

    I tried lowering the PIDs to P:25 I:0.9 D:25, Which seemed to make it worse.

    Any ideas? Im not sure if this is classed as a low speed oscillation or a high speed one?
     
  15. Bill Collydas

    Bill Collydas Active Member

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    Hi Ryan, I saw your post on RCG.
    Like many are saying drop to 2.3 is more stable I think they made some changes to accommodate the new IMU's and that don't work.
    I am using the 2.35b and I have no issues.
    Like the DJI firmware I stick with the 5.16 and is rock solid.

    Bill
     
  16. Ryan McCrae

    Ryan McCrae Member

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    Ok cheers for the explanation bill. Can you give me any pointers on what PIDs i could look at changing?
     
  17. Bill Collydas

    Bill Collydas Active Member

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    First of try to invert the motor for the roll and see what it does.
    If that don't work, disconnect the yaw and tilt motors from the controller.
    Set the roll PID's to default and go up from there.
    I hope this helps

    Bill
     
  18. Stephan Christian

    Stephan Christian New Member

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    Hello Everyone,

    Hopefully someone can help with the slight issue I am having. I have set up my brushless gimbal conversion with the Alexmos Control board. I have control over the pitch but I do not have control over the yaw axis. It seems like it is stuck in follow mode even though I have it disabled in the settings. I have attached some pictures of my settings ( I am still working on the PID settings so please ignore those). I feel like it is something simple but would appreciate any feedback.

    Our current GUI version is 2.40b6 and we are currently flying a GH3 with a 14-140 MM

    Thanks,

    Stephan
     

    Attached Files:

  19. Janne Hoglund

    Janne Hoglund Member

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    Have you got 2.40 working with an airborn gimbal??
     
  20. Ryan McCrae

    Ryan McCrae Member

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    I never managed to test on 2.3, I flipped on take off due to Super X, trying to work out what happened still. Any way the gimbal down tube broke, so il have to re vist it in a while after i get a replacement.

    I was wondering how is the 32 bit board going for aerial? Has any one got it working well with the two imu`s?
     

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