Re: [Amc-list] wow, OK, I'm impressed -- digital camera sees thread size

[Frank Swygert <farna@xxxxxxx>]

I bet the shop cut the one I had at 20 tpi then. It would only go in 3-4 threads, but was enough to work! 

----------------
Date: Sun, 3 Feb 2008 14:24:29 -0800 (PST)
From: Tom Jennings <tomj@xxxxxxx>

I believe I figured out TPI for the inside thread in the
American steering wheel, using my digital camera. It's a 7
megapixel Sony, I turned on "closeup", got out the thread guage,
and took a dozen photos.  The last one worked.

http://wps.com/temp/r1.JPG

That's an 18 TPI guage there. That picture is 3000 pixels across.
I loaded the image into the GIMP (open-source "photoshop")
and zoomed until the teeth on the guage were 1/4" apart on
the screen.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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