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

[js.smith at verizon.net]

Place a block of wood (1/2" mdf works) in each corner.  Clamp two strings on top of two of the diagonal pieces.  Clamp one string between the opposite corners.  The single string should go between the two strings.  If the single string only touches one of "doubles", then your corners are not true.

The second check is to then run another 1/2" block under all the strings to see that the clearance doesn't change.

If none of this makes sense, buy Bob Noll's Perfect alignment tape!

> 
> From: Mark Grabowski <MGrabowski at fmtinv.com>
> Date: 2004/11/19 Fri AM 11:21:06 EST
> To: "'discussion at nsrca.org'" <discussion at nsrca.org>
> 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?
> 
> 
> 
> 
> 
> 
> 
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