Soundboard Pre-Stressing/Downbearing, was: Baldwin accu-hitch pins

[Erwinspiano@AOL.COM]

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In a message dated 1/20/2002 8:20:04 AM Pacific Standard Time, 
davidlovepianos@earthlink.net writes:


> Subj:Re: Soundboard Pre-Stressing/Downbearing, was: Baldwin accu-hitch pins 
> Date:1/20/2002 8:20:04 AM Pacific Standard Time
> From:<A HREF="mailto:davidlovepianos@earthlink.net">davidlovepianos@earthlink.net</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 
> 
> 
> prestress the board, cut your notches in a few key areas, remove everything 
> and plane down the bridge, mark, drill, notch, etc... On a new board some 
> do this with a dry fit, before the glue in the board itself.  That way the 
> planing, drilling, pinning and notching can be done outside the piano where 
> there is more comfortable access.

<>>>>>>The dry fit procedure intruduces some degree of variance as the board 
isn't really held tightly to its final gluing surface and the rib ends can 
still move. However I do it this way and have learned to mitigate the flux 
factor. I'm getting to old to crawl up in the belly of a piano on my knees to 
notch a bridge for a hour or so. the bench is easier.
                   Dale Erwin

>  
> David Love
> 
> >> ----- Original Message ----- 
>> From: <A HREF="mailto:mfarrel2@tampabay.rr.com">Farrell</A> 
>> To: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> 
>> Sent: January 20, 2002 6:34 AM
>> Subject: Re: Soundboard Pre-Stressing/Downbearing, was: Baldwin accu-hitch 
>> pins
>> 
> 


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