Leveling a plate? Del? Ron? Anybody?

JIMRPT@AOL.COM JIMRPT@AOL.COM
Tue, 30 Mar 1999 07:56:08 EST


In a message dated 3/29/99 10:47:40 PM, Brian wrote:

<<I'm curious if anyone has a good technique for getting all of those
dowels or blocks to come into contact with the bottom of the plate at
the same time so that the plate isn't put under excessive stresses just
being bolted into the case.>>

Brian;
 Let's think about this for a second here. 'If' you have a plate that sets up
about 3/4" above the last set(s) of dowel pins, by the bass bridge, when the
pin web is resting flat on the wrest plank ( not uncommon in a well known
brand of 'quality' pianos).  And then you meticulously mate the dowel height
with the plate in this "unstressed" position..............
What happens to the down bearing on the bass bridge ?  (This applies to a
rebuild where the old board/bridges are used.) And would you raise the "short"
dowels or lower the "tall" dowels. If the latter, what happens to the bearing
in that area?
Are you ready to do some bridge work?

(short unsolicited plug for Baldwin----this is an advantage of the accujust
system, not having to be verrrry careful with bridge/plate height, and setting
bearing after stringing, the system works very well within its design limits.)

  If you are putting in a new board and bridges, setting the plate on large
screws, placed in the lag holes, and adjusted until you find the/a proper
positioning of the plate works. After adjusting each screw to achieve the
fit/downbearing that you want, dowels/blocks may be placed and trimmed to the
proper height realtive to the screw heads.
My view.
Jim Bryant (FL)


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