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Sherlock Ohms

The Case of the Seismographic Readouts

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Henrik
User Rank
Iron
Seismic sensor
Henrik   7/8/2011 6:42:34 AM
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Had similar problems with (video) CMMs in the past. A nice indicator and a good excuse ;) is a cup of black coffee. The reflections of the room light at the black surface make a quite sensitive indicator to seismic problems.

Greetings from Germany

Henrik

David12345
User Rank
Platinum
Coordinate Measuring Machine Vibration
David12345   7/1/2011 2:54:30 PM
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We had a similiar seismic problem with our visual grinders at our plant in York, PA.  It turns out there was a surprisingly well-kept secret that much of the city was tunneled-under by a limestone rock quarry 400 feet down.  The local toolmakers all knew about it from the ruined work pieces whenever the blasting below shook the ground like a semi-trailer truck or train going-by at a critical finish grind, but there was no highway or train track close enough to explain it.

I always thought it was strange that such a major operation was virtually unknown by most of the general public.

William K.
User Rank
Platinum
seismographic readouts
William K.   6/30/2011 3:17:37 PM
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It is always interesting to see how things that are assumed to not have any influence do have an influence. The CMM does wind up being a very sensitive device, and probably should contain an internal accelerometer to warn a user about machine vibration.

Rob Spiegel
User Rank
Blogger
Let's see your Sherlock Ohms cases
Rob Spiegel   6/29/2011 12:54:58 PM
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I can't tell you how many times the Sherlock Ohms cases involve some oddbird activities that affect a nearby process. Let us know your stories about weird performance oddities that took some investigation to solve. Send your Sherlock cases to Rob.spiegel@UBM.com.

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