Kimbal/Piano disk

[Joe & Penny Goss]

Murray,
The original left and right dags are still there but the center are missing,
having to be removed to make room for the solenoids. As far as I can tell
the noise is mostly as the key is pushed by the solenoid with a smaller
clatter as the key returns to the key bed. This makes me think that the
balance rail hole in the key may be a little large like Jim suggests.
Joe Goss
----- Original Message -----
From: M. Seminuk <seminukm@cadvision.com>
To: <pianotech@ptg.org>
Sent: Saturday, November 27, 1999 5:45 AM
Subject: Re: Kimbal/Piano disk


> Check to see if the rear dags are still there.If they were removed and not
> replaced this can cause the rear of the key frame to bounce . Listen
closely
> to find if the noise is caused in the up or down motion of the solenoid.
>
> Regards Murray
> -----Original Message-----
> From: Joe & Penny Goss <imatunr@primenet.com>
> To: pianotech@ptg.org <pianotech@ptg.org>
> Date: November 26, 1999 11:21 AM
> Subject: Kimbal/Piano disk
>
>
> >List,
> >In working on a Kimbal grand that has been fitted with a piano disk
system,
> >the major complaint was "the piano disk unit causes lots of noise".
> >I  have done the following to quiet the unit but can still hear unwelcome
> >noise.
> >Bedded the key frame
> >lubbed the frame drawer
> >tightened all binding screws in the action, rim and case parts
> >adjusted sustain
> >I was not able to service the piano disk   action parts that raise each
key
> >It is my belief that the most of the remaining noise is the result of the
> >key stick being raised too fast or far so that when it returns to the key
> >bed it does so with a clatter. Very softly but still a noise  that is not
> >heard when the piano is played by human means.
> >
> >Would replacing the balance rail felt punchings or front felt help?
> >
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