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Dead Weight Calibration Shaking

Dead Weight Calibration Shaking

(OP)
We have a Morehouse 550lb Dead Weight Calibration System.  When the system loads between 400 to 500 lbs, the weight rack begins to sway which imparts loads into our test element, making it very difficult to obtain a steady reading.  We are currently designing better fixtures so the sway does not directly translate into our test element.

Has anyone experienced this "weight shake" problem on this or any other dead weight system?  If so, how did you solve it?  We have several ideas, but proving the ideas would take many hours of trial and error to narrow down the specific cause and we can not afford the down-time right now.
Also, does anyone have any schematics on this sytem in case we are forced to try our ideas?

--Scott Wertel

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