[Metrology] This might make for an interesting experiment and video

Terrywerm

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A couple of years back, there was this thread (http://www.hobby-machinist.com/threads/cleaning-a-surface-plate.26893/) about cleaning surface plates. In that thread, Savarin said the following:

It does, markedly.
Next time your down we will get the ronchi/foucault tester out and you can see how much a lightly placed finger raises the surface as well as see the heat waves coming from said finger.
Such precision from a home made device cobbled together from scrap and two ultra cheap chinese micrometers.


Savarin, would you be willing to take the time to put together a simple video or slideshow that shows how this device is made and used? I think it would be a wonderful exercise and would be very educational.

Some may wonder why I did not just re-open the old thread, but this is actually an entirely different subject.
 
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