key leveling -- crown?

[Carl Meyer]

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MessageDale,
Thanks for that procedure.  Seems like a good one.  I do think that I =
would be concerned using dip as a measurement.  I'd feel like I was =
measuring speaking length with a rubber yardstick. The compression of =
the felt would concern me.

How do you like this?  Suppose instead of setting dip you measure the =
distance from the top of the key (natural) to the key bed and then the =
top of the key frame to the key bed.  You could use any type of depth =
gauge like a dial caliper or just a good rule.
This would be related to dip but would be more accurate and the key =
height would refer to the back rail of the key frame and the balance =
rail position  and the frame height would check the front rail.

I still think that after the glide bolts have been set in the piano, =
they should be backed out a set amount (like 1/2 turn) to prevent an =
error due to wear of the glide dowels.  They then can be accurately =
reset before reinstalling the action.

Regards

Carl Meyer  Assoc. PTG
Santa Clara, California
cmpiano@home.com =20

  ----- Original Message -----=20
  From: Dale Probst=20
  To: pianotech@ptg.org=20
  Sent: Sunday, November 18, 2001 12:07 PM
  Subject: RE: key leveling -- crown?


  Carl & Terry,
  Bed the keyframe, adjust the glides and set samples of dip in the =
piano before you bring the keyboard into the shop. Then when you clamp =
the keyframe to your bench, use shims to duplicate the dip on your =
samples. Don't adjust the glides in the shop. When you take the keyboard =
back you should be pretty accurate in the piano and just have touchup to =
do.
  Best,
  Dale
  Dale Probst, RPT
  Ward & Probst, Inc.
  email: wardprobst@cst.net
  (940)691-3682 voice
  (940) 691-6843 fax


  -----Original Message-----
  From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org] On =
Behalf Of Carl Meyer
  Sent: Sunday, November 18, 2001 1:07 PM
  To: pianotech@ptg.org
  Subject: Re: key leveling -- crown?


  Thanks Jon.  Didn't think of that

  Carl Meyer  Assoc. PTG
  Santa Clara, California
  cmpiano@home.com =20
    ----- Original Message -----=20
    From: Jon Page=20
    To: pianotech@ptg.org=20
    Sent: Sunday, November 18, 2001 10:45 AM
    Subject: Re: key leveling -- crown?


    At 10:29 AM 11/18/2001 -0800, you wrote:

      Sure sounds like something is moving.  If you find out just what, =
I'd like
      to know.

      I always clamp the key frame to make sure it is in contact with =
the bench.
      Sometimes even in the middle of the front rail.  I haven't =
actually leveled
      that many keys.  It's more fun to make tools than to use them.  =
I'm only
      half joking when I say maybe you should use go bars all over the =
frame.

      The problem, as someone suggested, in leveling in the piano, is =
that there
      is no room to install the weights on the backchecks, the stack =
isn't on
      (that may affect the height) and you have to sit so low that it is
      uncomfortable.

      I'm assuming you use the weights hanging off the backchecks.  They =
are
      probably heavier than the stack.  All these small variables add =
up, but I
      still feel doing at least the major leveling on the bench is more
      productive.  Especially when you are refelting the whole keybed.

      Let me know if you come up with any ideas as to why that is =
happening.

      Thanks;

      Carl Meyer  Assoc. PTG
      Santa Clara, California
      cmpiano@home.com

    I would like to mention something about the attachment of the =
clip-on lead weights.
    They should not be 'hung'_off_the back of the backcheck. This has a =
tendency to lift
    the front of the key higher than the weight of the action would, =
giving it a false height.

    They should be 'hung'_on_the front side of the backcheck. The action =
will fit better
    into the action cavity.


    Regards,

    Jon Page,   piano technician
    Harwich Port, Cape Cod, Mass.
    mailto:jonpage@mediaone.net
    http://www.stanwoodpiano.com
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=20

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