Key dip

[Michael Spalding]

Clyde,

You probably already checked this, but since you don't mention it...  How's
the lost motion?  Hammer blow distance?  If there's negative lost motion
(found motion?) fixing that might be all you need.  If not, see if you can
manipulate the hammer rest rail to gain a little additional blow distance
in the bass, crank the capstains down, and maybe that will do it??

Mike 


> [Original Message]
> From: Clyde Hollinger <cedel@supernet.com>
> To: <pianotech@ptg.org>
> Date: 11/6/2003 5:33:11 AM
> Subject: Key dip
>
> Friends,
>
> While tuning a 1980 Wurlitzer studio piano today I noticed some of the
> bass hammers would damp the strings depending on how they were played.
> Letoff was fine, but there was too much keydip, resulting in the
> backchecks pushing the hammers into the strings after letoff.
>
> It appears to me that all other specs will be in the correct range if
> the keydip is reduced.  Can this be done by shimming up the front rail
> of the key frame, if there are no shims to remove from under the balance
> rail?  I've never tried this.  I could put card punchings under all the
> front felt punchings, I know.  Advice?
>
> Regards, Clyde
>
>
>
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