Soundboard Clamping for Downbearing

[Farrell]

Marcel wrote:

> To me, after the crowning process, the board should not be dried again. I
> think that high temperature MIGHT affect the glue hardness and cause crown
> collapse (a little at least).

Please explain what you mean by "high temperature". And why would it be used?

Terry Farrell
  
----- Original Message ----- 
From: "Marcel Carey" <mcpiano@globetrotter.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Thursday, December 19, 2002 11:16 PM
Subject: RE: Soundboard Clamping for Downbearing


> Terry,
> I don't think you should dry the board before gluing to the rim. The
> assumption that the board will shrink is false. After the ribs are glued,
> the only thing that is going to change with hunidity is the amount of crown.
> To me, after the crowning process, the board should not be dried again. I
> think that high temperature MIGHT affect the glue hardness and cause crown
> collapse (a little at least).
> 
> So, I would and will just clamp the board to the rim making sure that the
> humidity conditions are "normal" (if you deal with extremes, you might want
> to have more or less downbearing). With the Mason that I'm working with
> these days, the board was glued in using soundboard buttons (someone might
> tell me if this was original or not). But you could use this to tie the
> board down for bearing adjustments.
> 
> Have fun and keep me in touch. We are learning my friend.
> 
> Marcel Carey
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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