Pinning and Tone

[Fred Sturm]

--On Tuesday, October 28, 2003 11:28 AM -0700 Fred Sturm <fssturm@unm.edu> 
wrote:

snip
> I was told they were using a 4 1/2" radius, but the source for
> this wasn't absolutely sure. What I saw did look like a bit larger radius
> than I use (I use 3 - 3 1/2"). I was told the larger radius worked in
> relationship with the backcheck angle. A bend in the backcheck wires
> (done by a precise fixture about half way up the wire) puts them at 68
> degrees.

	This whole idea didn't compute with my sense of geometry at the time, and 
after putting it down on cyberspace paper, it still sticks in my craw. I 
have one possible explanation - maybe the radius has its center, not on the 
shank, but at a point somewhat above the shank. Then it could work, at 
least in my non-CAD-aided imagination. Alternately, it could be a mild 
parabolic arc, instead of a circular one.
Regards,
Fred Sturm
University of New Mexico