soundboardinstal again

[Delwin D Fandrich]

----- Original Message -----
From: "David Love" <davidlovepianos@earthlink.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: July 25, 2003 5:37 PM
Subject: Re: soundboardinstal again



> What relevance,
> then, is the amount of deflection.  For example, David Hughes writes that
> he aims for about 3mm at the centermost strut.  Is this, then, just a
check
> to be sure that the board, when stressed to your satisfaction by feel,
> hasn't moved farther than you anticipated serving as a general indication
> of stiffness?

When we do this the objective is to take out some specific percentage of
crown during the bearing setting process. The amount of preset will vary
depending on the type of ribbing (heavy/light, high crown/low crown, etc.)
and the length of the backscale.

With a light, low crown and long backscale system I'd want the board preset
closer to flat, with a heavy, high crown and short backscale system I'd
want the board preset a bit high.

There's no standard--it's all relative.

Del