Soundboardcrownpress

[Erwinspiano@aol.com]

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In a message dated 12/17/2002 10:11:24 AM Pacific Standard Time, 
mfarrel2@tampabay.rr.com writes:

> Subj: Re: Soundboardcrownpress 
>  Date: 12/17/2002 10:11:24 AM Pacific Standard Time
>  From: <A HREF="mailto:mfarrel2@tampabay.rr.com">mfarrel2@tampabay.rr.com</A>
>  Reply-to: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
>  To: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
>  Sent from the Internet 
> 
>             Terry and all

                      Dave cuts the crown into his ribs (as do many) so that 
where feasible the thickest part of the rib is under the bridge or near it. 
This has exceptions ,one of which is in the top treble on the last three or 
four ribs. If you followed that design to its conclusion in the top ribs the 
resu;t would be a fat stick on one end as the bridge is within inches of the 
belly rail at that point. The other is that in the bass end it's also fudged 
as an average between the tenor and bass. I know this is a common design and 
I've heard some that sound really fine but can't verify and superiority.  
I've tried it both ways  myself and I'm not personally convinced this is 
necessary nor attributable to any enhanced tonal performance. A salways its 
never one thing. 
      As to the pneumatic press being the key , the apex  (deepest part  ) of 
the appropriate curved rib caul is also positioned under the bridge line 
location where the rib is thickest.
    I think most techs who cut ribs this way are probably doing it in a type 
of router set up jig and not typically the type of tables saw jig I'm  
currently using although as I said I've done it with this jig  as well.
           Dale Erwin

> 
> David Hughes attempts to do this with his pneumatic soundboard press. He 
> describes his press in a Journal article a few years back.
> 
> Terry Farrell
>  


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