Kawai bedding response (could be humor)

[bruce greig]

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MessageI found this amusing, guess Don didn't take it that way.


----- Original Message -----=20
From: bruce greig=20
To: Don Mannino=20
Sent: Wednesday, June 11, 2003 10:26 PM
Subject: Re: Kawai KG2D #1582033



Thanks, Don, you do realize what your're saying here..........

I have to say, though, that this sounds like the piano only needs a =
thorough, back front and balance bedding.  Rather than trying to do a =
quick re-adjustment, allot the time to do the whole job and you will =
likely find that the problem will be solved.  When we hear this kind of =
"It's always been this way" complaint, this almost always means that no =
one has taken the time to properly bed it.

don't you?

Bruce
  ----- Original Message -----=20

  From: Don Mannino=20
  To: 'bruce greig'=20
  Sent: Tuesday, June 10, 2003 6:52 PM
  Subject: RE: Kawai KG2D #1582033


  Bruce,

  Kawai keyframes should be bedded flat with no pressure on the keyframe =
guide pins.  Generally if this is done during a dry time, the keyframe =
will stay knock-free during humid weather, but extreme conditions can =
cause the keyframe to move one way then the other with the seasons.  =
Adjusting the balance rail glides will not stop front rail knocking =
(unless they have been grossly misadjusted), and your message does not =
make it clear why you would adjust the glides to stop knocking, then be =
concerned about pressure on the guide pins for the front rail.

  Repeated re-beddings can cause the front rail lip on the bottom to be =
worn away, so that black keys will always knock on hard blows and it is =
difficult to re-bed things.  In this case, you should glue a strip of =
hard wood veneer along the front edge, about 1/4" wide or so.  This can =
be done only at the ends if needed, or along the full length of the =
rail.  Use aliphatic resin glue, then iron it down with a warm iron and =
wax paper.

  After the rail lip has been rebuilt, a lot of sanding and re-bedding =
should be done.  You say you are familiar with keyframe bedding =
procedures, so I don't need to give you details for redoing the keyframe =
back, front and balance rails.  The key dip should also be reset if the =
front rail is thickened.

  If the location of this piano has extremes which require key block =
hold downs, you should be able to use the RX style keyframe guide =
blocks.  This should not be done until after the keyframe itself is well =
bedded, though.

  In some extreme cases the keyframes have needed kerfing and wedging, =
but this is pretty rare.  If the front rail lip is still in good shape, =
and the keyframe ends warp up 1/4 in the winter, then getting it kerfed =
flat will make it flat for you.


  I am in Japan this week, but Nick Gravagne and Andrew Thomas are in =
the office if you want to call and talk to one of them about this.  The =
number is (800) 421-2177.

  Don Mannino RPT, Manager
  Kawai Piano Technical Support, US and Canada
  dmannino@kawaius.com
  www.kawaius.com

    -----Original Message-----
    From: bruce greig [mailto:bgreig@nyc.rr.com]=20
    Sent: Tuesday, June 10, 2003 12:30 PM
    To: acoustic2@kawaius.com
    Subject: Kawai KG2D #1582033


    I've been servicing the above piano for about two years.  According =
to the owner, it has always had a problem with keyframe knocking and =
even after glide adjustments, the knocking always returns.  I've also =
found this to be true.  On my last visit, repeated attempts at glide =
adjustments including the ones reachable only from the underside, were =
fruitless.  I also observed that the treble keyend block was not even =
touching the keyframe guide pin.   Please note that I am well =
experienced with keyframe levelling procedures.

    My questions now are: should this piano have front rail keyframe or =
keybed glides installed and can you provide those parts (ones similar =
those on the underside of the center rail.) with directions for =
installation? =20

    and, what approach do you advise for the ineffectual key end block =
situation? As a stopgap, I put a couple thumbtacks on the underside of =
the front rail, which has stopped the knocking.=20

    I will be preparing this piano on Friday for performance use and =
would appreciate any advice asap.

    Thank you.
    Bruce Greig, PTG, RPT
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