Your Radian gains?

Discussion in 'Radian' started by Brad Meier, Sep 19, 2012.

  1. Wolfgang Armin

    Wolfgang Armin Active Member

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    Thanks for the tips, Andy. I´ll try to do a lot of tests over the weekend. Hopefully the weather will be OK. And yes, I hear you about the confusion. I always think that I can memorise things (being too lazy to write things down) which usually doesn´t work at all.
    I´ll start with every radian as a single unit - don´t know if that works though.
     
  2. Janne Hoglund

    Janne Hoglund Member

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  3. Janne Hoglund

    Janne Hoglund Member

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    Hi Philipp, what camera lens are you using?
    Weight of camera and lens?

    Regards from Sweden.
     
  4. Wolfgang Armin

    Wolfgang Armin Active Member

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    Hi Janne,
    thanks a lot - I did some roll only tests today and went to 130 without problems in little wind. Very smooth video.
    I´ll continue tomorrow with tilt and pan.
     
  5. Philipp Goose

    Philipp Goose Member

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    Hi Janne, i use gh2 hack with kit zoom lens and zeiss compact prome2. 21
     
  6. Janne Hoglund

    Janne Hoglund Member

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    Thanks Philipp, but there must be a substantial weight differense between the lightweight kitlens and a Zeiss compact prime.
    Are you using the same settings, with smooth results for both of them??
     
  7. Wolfgang Armin

    Wolfgang Armin Active Member

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    Wow, today was a perfect day. Beautiful sun and no wind way past noon which is very unusual here. I did around 4 hours of testing and finally achieved a result that I really like.
    My settings are now 60/130/150 and they work for Sony CX730 and Sony NEX5N without wind. I´ve also tried the 5DMkII but I guess I have to do some more tweaking for this cam.
    I started with every radian as a single unit. Sometimes it´s hard to figure out which is the direction that shakes the footage (roll or tilt), so you can´t really say if the adjustment you´re making is getting better or not.
    However - the biggest problem for me stays pan. The CX730 filters out the pan-shake really well, but the NEX works way better, leaving pan totally "unradiated". CX730 footage now looks almost as shot from a tripod.
    I didn´t have time yet to exchange some of the radians or servos to see if it would get better panwise.
     
  8. Brad Meier

    Brad Meier Active Member
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    I was thinking about replacing the tilt servo to see if that fixes anything but now I may just try adjusting one radian at a time and if that doesnt work probably go to a new servo. I have no issues with pan and very little with roll. Seems my tilt is just terrible. Ill try switching radians for the pan and see what happens.
     
  9. Peter Gøthche

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    my sittings are tilt: 160 roll:120 and it seems to work wery well
     
  10. Brad Meier

    Brad Meier Active Member
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    Hey Tabb,

    Why is the difference between the servos with the gold colored casing and the all black? I have gold on the tilt and roll but black on yaw. Got a new one on the way to test on my tilt axis..
     
  11. Tabb Firchau

    Tabb Firchau Administrator
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    Hey Brad, no difference apart from the color.

    Best,

    Tabb
     
  12. Janne Hoglund

    Janne Hoglund Member

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    What Camera -lens, weight of them?

    Regards.

    /Janne
     
  13. Peter Gøthche

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    Its a nex5n with a 18-22 lens. Camera + gimbal is about 1,1kg
     
  14. Janne Hoglund

    Janne Hoglund Member

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    Thanks Spyde, that is the 18-55 mm you mean ;-)
     
  15. Peter Gøthche

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    Yes offcourse sorry ;-)
     
  16. Brad Meier

    Brad Meier Active Member
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    Tabb, Andy..

    I believe I fixed some of my issues. I found a little bit of vertical play in the main shaft connection to the copter. I had about 1mm of play there which after investigating, found that when all 8 bolts are tightened down on top of the gimbal mounting plate (4 to the shaft, 4 to the yaw/pan gear) a gap was created. I noticed the top of the shaft was not flush with the top of the gear. I added 4 washers between the mounting plate and the pan gear. Gap is gone...

    Test flew with the 7D again and now tilt is much better, Roll still has a little action but it doesnt look like vibration.. but something I can fix with gains.

    I have no idea why the shaft and top gear are not lining up.
     
  17. Tabb Firchau

    Tabb Firchau Administrator
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    Hi Brad, there should be an o-ring on the pan assembly to take up any slop, was yours installed? With this 1mm play were you actually able to make the gimbal move up and down? Reason I ask is the pan shaft is such a precision fit in the bearings I can't imagine it moving up and down even if there was 1mm gap?

    Glad you are getting things dialed!

    Tabb
     
  18. Brad Meier

    Brad Meier Active Member
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    The O ring was installed. With the O ring, the carbon bushing, and the pan pulley on the shaft, the shaft was extending higher than the top of the pulley. So basically those 3 items were floating around the shaft with what seemed to be a little less than 1mm. When you tightened everything down and the copter was on the ground, the gap would be at the bottom of the shaft just above the flange. I added nylon washers directly on top of the pulley and that did the trick.
     
  19. Carsten Poulsen

    Carsten Poulsen New Member

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    Hi Brad, can you post a picture of the gab / new installed washers?
     
  20. Brad Meier

    Brad Meier Active Member
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    Ha.. I couldnt even see them when I installed them. If you remove the 360 gimbal from the vibration isolators you'll see the 8 bolts that hold the plate to the mount. The inner 4 hold the plate to the shaft and the outer 4 hold the plate to the pan pulley. I put the washers just under the plate, between it and the pan pulley.

    Does your mount also have play in it?
     

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