Regulation bench bedding

[Stephen Bellieu]

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Hey Keith,

I have lately been setting "no aftertouch" on a few notes in the piano =
with a weight that John Hartman has dubbed the "third hand".  Stack =
punchings on the frontrail pin of the key in question until it just lets =
off when this weight is very gently lowered onto it.  It might even =
letoff a second or two after you have completely released the weight.  =
When you get to the bench do whatever you have to to duplicate this =
feat,  tape shims to the front rail or glides or turn down glides or any =
combination.    I have some wood shims that taper down to nothing.  If =
needed they are inserted under the frontrail until the deed occurs and =
then marked and labeled (also mark frontrail).  Locate the action in the =
same place every time on your bench.( The height of letoff is =
unimportant in the piano and on the bench, you can set it in the piano =
if you want just don't change it after removing action until you have =
set up your bench )  You might need to clamp down the front rail at the =
two ends to get everything working,  then aftertouch set on the bench =
will be very close.  No need to measure anything.  My bench is flat =
marble,  not because I'm that anal (well actually I can be) but because =
I used to install the stuff.  You don't need a bench that flat.  Some =
actions need almost an eighth inch under the front rail to duplicate =
what is happening in the piano.  Steinway frames are stiff enough that =
they can be duplicated with three notes.  (Well the old ones anyway)  If =
you have more of a Yamaha style set a couple more notes.  Good Luck.

Steve Bellieu                  P.S.  For various reasons I like to set =
the glides properly before I take away the action and so I
                                              prefer not to mess with =
them too much on the bench.
  ----- Original Message -----=20
  From: Keith Roberts=20
  To: Pianotech=20
  Sent: Friday, January 10, 2003 8:15 PM
  Subject: Regulation bench bedding


  I just replaced the brackets on a Y&C. I brought it home so I could do =
it on a bench that was the right height. I set my boards to string =
height and roughed in blow distance and jack position( 1/4" out). =
Started through letoff and the sharp dip was about right but the whites, =
the dip was so shallow the hammer rise was shy of letoff by 1/2". I know =
you can't set dip out of the piano and realized I should have measured =
the dip because now I'm wondering if the tech that wound all the =
adjustments out, messed with the dip so as not to break the jack off =
against the stop. In this case, the drop screws came up 3 turns and the =
let off buttons 5 turns. So now I'm thinking I should have shimmed the =
balance rail up to get enough dip so I could set let off. My aching back =
tells me I'm doing way too much work in the piano. It would be so nice =
to duplicate the bedding, so the amount of refinement in the piano was =
minimized. Dale Erwin said I could take sample dip reading of every C =
and shim the rails to duplicate the dip.=20
  Does anybody have any other methods? Would it be better to take the =
sample dip readings at the notes next to the bedding bolts.
  Your thoughts please.
  Keith R

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