Downbearing - Setting with Loose Board

[David Love]

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On the soundboard that I=92m currently doing I=92ve secured the board to =
the
rim with screws and cardboard washers=97as in front rail punchings.  A =
few
small screws (#8 x 1 =BC=94 and they have that built in washer at the =
head)
into the rim in the area under the plate about every 12 =96 18=94 or so =
(I
can=92t remember the exact spacing), and a clamping block on the =
straight
side and the cutoff area where the plate is not in the way.  I drill the
hole through the panel large enough so that the screw is not actually
cutting or binding in the panel, only in the rim.  Once the board is in
the holes can be filled and won=92t show anyway since they are under the
plate. =20
=20
David Love
davidlovepianos@comcast.net=20
-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Farrell
Sent: Wednesday, October 13, 2004 8:05 AM
To: pianotech@ptg.org
Subject: Downbearing - Setting with Loose Board
=20
I'd like to start a discussion on setting downbearing as part of
rebuilding a piano - specifically, what methods of clamping the
soundboard to the rim are used by those who plane their bridges for
appropriate downbearing prior to gluing the soundboard to the rim.
=20
Obviously one needs to have both the soundboard and the plate in the
case to set downbearing (bridge height). The problem arises (at least
for me) in the fact that the plate is in the way of easily/directly
clamping the soundboard to the rim (such that bridge height relative to
the plate will be accurately represented). I have used little wooden
wedges placed between the plate bottom and the soundboard top in the
past - and that seems to work - but I wonder if there is not a more
efficient/easier/faster way to do this.
=20
How do others approach this task?
=20
Terry Farrell
=20
www.farrellpiano.com

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