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Steadicam Zephyr shake?


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#1 Brent Johnson

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Posted 01 February 2012 - 02:23 AM

I've been practicing lately and I have noticed after I watch some footage that the frame gives a bit of a shake while walking. Is this a common "noob" occurrence? Is it the arm not calibrated right? I'm trying to figure this thing out with different set ups. If you have any ideas, that would be awesome.
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#2 Wolfgang Troescher

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Posted 01 February 2012 - 02:43 AM

I didn´t realize any shaking, just a little "bobbling" when I walk very slowly. But I think it´s because I need more practice, or this is the little difference between the Zephyr arm and a "little more" expensive G70X.

How much is your load? I use a weight cage to increase weight. When I move in a "normal" way the Zephyr-arm produces very good results.

Perhaps you can show us an example?

Wolfgang
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#3 Brent Johnson

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Posted 01 February 2012 - 03:16 AM

My load is around 15-17lbs I also have a 5lb weight on my rig from a weight set that I use with 7d's and 5d's. I'll throw something up to show you what I mean. Just some walking around in the apartment complex.
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#4 Brent Johnson

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Posted 01 February 2012 - 03:39 AM

My load is around 15-17lbs I also have a 5lb weight on my rig from a weight set that I use with 7d's and 5d's. I'll throw something up to show you what I mean. Just some walking around in the apartment complex.



I was going through the rig just now and I noticed that the gimble's "yoke" (I don't know what else to call it, its the pin that goes into the gimble that is connected to the handle) That part is a bit loose when I have it on my stand. Would that cause the shake?
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#5 Wolfgang Troescher

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Posted 01 February 2012 - 03:45 AM

Not sure we´re talking about the same thing. But is this "yoke" still there under load?
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#6 Brent Johnson

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Posted 01 February 2012 - 03:48 AM

The bolt doesn't wiggle while under load, no. im trying to post a vid to youtube now.
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#7 Wolfgang Troescher

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Posted 01 February 2012 - 03:53 AM

This little clearance on the gimbal is normal.
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#8 Brent Johnson

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Posted 01 February 2012 - 04:42 AM

ok, thanks. Would some shake happen if I wasn't dynamic balancing? I'm having some difficulty doing that.

Edited by Brent Johnson, 01 February 2012 - 04:42 AM.

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#9 Wolfgang Troescher

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Posted 01 February 2012 - 04:46 AM

I think no. Dyanmic balance is particularly important if you pan your camera, so you don´t have to compensate the tilt.
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#10 Brent Johnson

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Posted 01 February 2012 - 05:00 AM

All right, check out this shake/wobble thing. I cranked up the iso because there is zero lighting at my place.


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#11 Wolfgang Troescher

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Posted 01 February 2012 - 05:10 AM

All right, check out this shake/wobble thing. I cranked up the iso because there is zero lighting at my place.



Wow! This shaking is terrible :o :o ! Don´t know the cause for it. Seems your system has some interferences. Perhaps the professional operators know more about it.

Wolfgang
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#12 Brent Johnson

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Posted 01 February 2012 - 05:24 AM

yeah weird right?? Hopefully tomorrow morning someone else could chime in with some advice. I'll keep working on it and tweaking things too see if i can make it better.

-B
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#13 Michael Wilson

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Posted 01 February 2012 - 09:31 AM

Something is probably loose on your sled. Check every connection between components. Almost looks like electronic camera stabilization. Try stomping around to see if there is vibration making its way to the sled.
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#14 Alan Rencher

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Posted 01 February 2012 - 12:44 PM

I had this problem with a red camera once. I figured it was because the camera was front heavy, and I had move the whole thing back on the sled. The RED didn't have a beefy Arri style dovetail, so I only had the thin aluminum from the Zephyr's dovetail holding the camera up. Every little, minute movement was, of course, amplified.
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#15 Mark Schlicher

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Posted 01 February 2012 - 01:05 PM

That's not normal.

Particularly check the connection right under the camera stage, at the top of the post. Make sure the hex nut is snugged up tight.

It looks to me like the vibration or flex is coming from the camera stage. How is your camera connected to the weight plate? How is the weight plate connected to the sled's dovetail plate? A few photos of your camera setup would be helpful.
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