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Vibration On Ultra 1 - what's the culprit?


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Hi chaps,

 

I'm in the first couple of months of operating an Ultra 1, and today I noticed a vibration in the image. Everything was locked tight and firm when static, so what could be causing this when I'm on the move? My first thoughts were the tilt stage, the Ultra dovetail plate which is quite thin, or the standard Alexa Steadicam plate (little black thing) which does not support the back-end of the camera. All of these seem improbable now, but the vibration was definitely there, and quite embarrassing. What am I missing?

 

Would be grateful to hear from someone more experienced than me about the usual causes of this problem.

 

Thanks as always,

 

Sam

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did you have any accessories on your sled? the source of the vibration might not be in the stage/camera portion of the rig. even a poorly attached decimator or video sender can translate to vibration in the image. (i.e. a long magic arm extending from the rig, carrying a relatively small load)

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  • 4 months later...

Hi,

Today even, I found the image vibration as i mounted canon c300 with ultra prime lens. And througly chkd all screws all wer firm.

I cnt understand wats the vibration of.

I have no accs attached just a m one motor attached.

Ny one can let me knw wats the prblm.

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Since you seem to have tightened down everything else, check the tightness of the rails - for and aft and side to side. If they are too loose, you get vibration.

 

try 1/8th turn or less on each screw; go slowly and test if you can still run the stage back and forth and side to side. It's a bit of a pain to get to all the screws, but I remember it can be done without undoing anything on the stage.

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That side to side slider was the culprit on my Zephyr. It's quite easy to adjust on the zephyr (easier than the gimbal that is) just 3 little Allen screws to turn.

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Please see the thread entitled "CP Wedge Clamp " for the cause and superb solution, originally crafted by Cinema Products.

 

Best to all,

 

Peter Abraham, S.O.C.

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  • 2 years later...

Hi everyone

I got similar problem. During running or even fast walking there are some vibrations on image. All is strange because it's second time I've. There is a place when using some force is kind of play - see photo

https://goo.gl/photos/9HqYzNnc6FizSye2A

All 5/64 scerws seem to be good tightened

https://goo.gl/photos/yD8ur2dNeVw5SnLe6

Do you think only Wegde Clamp can solve the problem? CP haven't produced it any more. What to do?

 

Best regards

Stan Marcinkowski

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  • 4 months later...

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