Practical Concert Work

[Fred Sturm]

Hi Jim,
	I guess it's about what I end up with. My complaint is that the final caul 
doesn't press the felt quite enough to hold it firmly for cutting, when the 
felt thickness is correct. I think a couple thousandths thicker would hold 
enough tighter to make the job easier, and wouldn't press the felt so much 
that it would be sloppy. Just a random thought while being frustrated 
having to hold each caul while slicing. Or, when having chosen a slightly 
thicker felt so I don't have to hold he caul, finding I need to ease by 
squeezing wood. I could well be wrong in thinking that a slightly thicker 
caul wouldn't create the slop I want to avoid.
	Bottom line is that the system works beautifully when you come up with 
just the correct felt thickness.
Regards,
Fred

--On Saturday, May 29, 2004 3:09 PM -0600 Jim Busby <jim_busby@byu.edu> 
wrote:

> Fred,
>
> What about Spurlock's method of choosing cloth thickness(on his
> website)? Doesn't that work for you?
>
>
> Jim Busby
>
>
>
> ...My complaint about
> it being too loose is that the caul doesn't hold the felt quite tightly
> enough for cutting purposes, and I have to bear down/sidways on the caul
>
> while cutting to avoid the felt pulling). I just experiment with various
>
> sizes I have in stock until I get what feels right. Sometimes that is
> two
> slightly different sizes (one in each side of the mortise).
> 	I have found that if I get that loose fit when installing the
> finish caul,
> ironing with the parallel sided brass cauls from Pianotek leaves me with
> a
> perfect fit, and I don't find myself needing to do any easing a year or
> two
> down the road. Absolutely no custom easing (except for balance hole). If
> I
> use felt that is not all that much tighter, I find that no amount of
> ironing will create a permanently correct size - I have to squeeze wood,
>
> which I vastly prefer not to do, both for practical and theoretical
> reasons.
> Regards,
> Fred Sturm
> University of New Mexico
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