Oops! I was wondering where that post went when my computer crashed! Completed post was also sent. Terry Farrell ----- Original Message ----- From: "Farrell" <mfarrel2@tampabay.rr.com> To: "Pianotech" <pianotech@ptg.org> Sent: Saturday, December 21, 2002 10:15 AM Subject: Re: Soundboard Clamping for Downbearing > Sounds to me like you are headed in the right direction. One thing that caught my eye and I though good to point out in case someone else does not. You wrote: > > "....and placing new crowned ones, drying the board and the ribs carefully to a MC as low as possible and then gluing and clamping them together." > > Drying the board as low as possible will mean death of the board. DO NOT DO THAT. Depending on a host of factors, most of which are beyond my expertise, you will want to bring the board to an EMC of between 5% and 6%. My understanding is that if you are going compression > > > > So if you want to know, I'm going to restart, ie taking of the ribs > > whith a plane and placing new crowned ones, drying the board and the > > ribs carefully to a MC as low as possible and then gluing and clamping > > them together. > > The "only" problem I still have: how much crown should I give to the > > beams of my press: none, and arc of +/-18m for the longest ones and > > +/-15 for the shortest ones, (like the ribs are precrowned), + for > > having more crown at the end? (How much should one have with a new > > board anyway?) Can somebody me tell that please? I only know that the > > uncrowned beams of my press give about one cm of crown when I'm blowing > > the hoses. > > > > > > I also want to thank all of you who have discussed this item. Do not > > think I feel blamed but it was hard at some points. I have learned my > > lesson and made my conclusions that you can read above. But I think > > this was the money I have to pay for. And after all, in doing 15 years > > of restoration of piano's, I have only to restart 2 times a job. I > > think that's not bad. And also, making soundboards, I love it more and > > more. > > > > Peter > > > > > > > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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