# Digital Angle Gauge

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• posted on June 20, 2009, 8:06 am

I just use whatever square or bevel is handiest. Dim the overhead lights, set a lamp on the saw table, and try to kill the peep of light between the blade and the gauge. According to Starrett's engineers, if you have good eyes, that puts you within 50 millionths of an inch of spot-on.
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• posted on June 23, 2009, 12:46 am

Think a custom cut triangle qualifies as a bevel, doesn't it?
The "line of light" technique is quite accurate, but my preference is to compare freshly cut scrap piece against the complementary angle on the table as opposed to the gauge angle against the blade.
If there is an error, it creates a "line of light" you could drive a Mack truck thru.
(OK, a Peterbilt for the Texans)<G>
Lew
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• posted on June 23, 2009, 7:42 am

Be sure to use a violet light, since it has the shortest wavelength still visible to human eyes.
Press both halves of the joint together and measure the dihedral along both pieces. That'll multiply the error lots more.
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• posted on June 20, 2009, 2:15 am

A little transfixed about this aren't you? It's wood. From minute to minute it's affected by expansion and contraction.
I've cut what I'd consider to be really tight tolerances in wood, but the most I've ever needed has been 1/64" exactness. Maybe you don't consider that very exact, but it's worked well for me as I suspect with most people.
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• posted on June 17, 2009, 10:46 pm

And, I forgot to mention one other consideration. For a woodworker, this digital angle gauge has immeasurable toy value. I figure there's hours and hours of play potential incorporated into it. :)
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• posted on June 17, 2009, 10:02 pm
wrote in message

I like the way you think.