Measuring Surface Flatness (was "Cabinet Grade Particle Board")

[brett terry]

A common fluorescent light has an extremely precise surface straight
surface, something like a couple of ten-thousandths of an inch.  Just
roll it along the surface of the table and check for light between the
bulb and the table, or try to slip a sheet of paper through.

I was surprised to discover that my 6' aluminum "straight edge" wasn't
precisely straight!

Cheers!

Brett Terry

> 
> ----- Original Message ----- 
> From: Mark Grabowski 
> To: 'discussion at nsrca.org' 
> Sent: Friday, November 19, 2004 11:21 AM
> Subject: Measuring Surface Flatness (was "Cabinet Grade Particle Board")
> 
> 
> 
> We've seen some great ideas from several folks. However, a common element to
> this discussion is that you need to measure how flat the surface winds up.
> What tricks are you guys using to actually measure how flat the surface is
> of the bench you just built?
> 
> 
> Bob Richards
> bob at toprudder.com
> http://www.toprudder.com
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