Pianotech Digest, Vol 1283, Issue 38

[Mike Spalding]

Jeff,

I'm afraid that if the whites are hitting the blacks' front rail 
punchings before their own on the bench, they will probably do the same 
in the piano.  You've got to either lower the black front rail punchings 
relative to the whites, or raise the whites relative to the blacks.  If 
the black and white dips are both OK and roughly equal, then I would 
guess the black height is too high above the whites.  If you can lower 
the blacks, then you can remove punchings from the black front rail.  
What's your black key height right now?  and when you play a black key, 
how much of it remains above the surface of the whites?

Mike

Jeff Miller wrote:
> Mike,
> No.  When the whites bottom out on the black FR punchings, they have 
> not made it to the 3/8 dip.  I usually set the whites dip first and do 
> the blacks.  After the blacks are set  the whites will no longer dip 
> all the way down. I'm sure from some of the other post that this is 
> probably a problem stemming from not setting key hight in the piano.  
> I am scuedaled to be in the ladys house tomorrow and I can already 
> tell it's going to be a long day. 
> Jeff
>
>     Jeff,
>
>     Please clarify: When the whites bottom out on the black FR punchings,
>     have they dipped 3/8, or are they bottoming before reaching 3/8? I
>     don't understand which problem, or both, you are experiencing:
>     a) Whites bottom out on black FR before reaching full dip,
>     or
>     b) Full 3/8 dip is not sufficient to get let-off and aftertouch.
>     (I used 3/8" in the above problem statements, but as others have
>     pointed out, you should probably be using 10mm, or .394", which will
>     give you and additional .019" to play with)
>
>     Mike
>
>
>