spinet hammer blow..WHOOPS!

[Barbara Richmond]

Terry,

Sometimes, in those naughty pianos that have no Dampp-Chaser systems (and
really,really need them), keybeds have been known to heave up with summer's
humidity and go back down again in the winter. At least that's what I ran
into that some years ago.  That could account for adjusting the hammer rail
every six months.....

Barbara Richmond, RPT
somewhere near Peoria, IL


----- Original Message -----
From: "pianolover 88" <pianolover88@hotmail.com>
To: <pianotech@ptg.org>
Sent: Sunday, November 02, 2003 7:43 PM
Subject: Re: spinet hammer blow..WHOOPS!


> >Building up the hammer rail felt or the rest pads for same will increase,
> >not eliminate lost motion<
>
> Yes! Sorry about that. I meant precisley the oppsite of "eliminating" lost
> motion! I encountered a Falcone upright where the tech HAD added some
muting
> felt to build up the hammer rail because there was NO lost motion at all;
> the hammer shanks were 1/4" above the rail! At least that's where they
were
> when the muting felt was removed! the last tech just didn't want to take
the
> time, evidentally, to regulate the capstans; that job was left to me. With
> the original felt squares in place, the hammer blow was exactly 1 7/8".
>
>
> Terry Peterson
>
>
>
>
> ----Original Message Follows----
> From: Richard Brekne <Richard.Brekne@grieg.uib.no>
> Reply-To: Pianotech <pianotech@ptg.org>
> To: Pianotech <pianotech@ptg.org>
> Subject: Re: spinet hammer blow
> Date: Sun, 02 Nov 2003 23:43:36 +0100
>
>
>
> Dave Nereson wrote:
>
>  >
>  > > I removed the felt squares from under the hammer rail to exazmine
them;
> they
>  > > certainly appear original. I have indeed encountered verts where the
>  > > previous "tech" had "padded" or built-up the rail with felt
(sometimes
> even
>  > > with what appeared to be a snippet of muting felt!) in order to
quickly
>
>
>  > > eliminate lost motion..boy I HATE that!  L A Z Y !!!
>  >
>  >     Building up the hammer rail felt or the rest pads for same will
> increase, not eliminate lost motion.  Felts or pads added to the rest pads
> are usually put there to set the blow back to normal after filing hammers,
> which on very worn hammers can remove 1/8" or more of felt.  Adding these
> pads of course increases the lost motion and then the capstans have to be
> turned up, which sometimes also makes the dampers lift too soon, and with
> the hammers filed, the let-off is now wider, so that has to be
re-regulated,
> and usually the dip and backchecks also.  So those added-to pads are
> sometimes a sign not of laziness, but of someone's major regulation job.
>  >
>  >
>  >     Thought so.  Glad it worked out!   --David Nereson, RPT
>
> Correcto there David... but sometimes you run into the reverse problem...
> for some reason or another there is reverse lost motion and the jacks wont
> slip under, or not easily enough. If the whole piano is like this, and you
> have only a few minutes to fix it...then jacking the rail forward will do
> the quick fix. Bad form IMO, and in the instance definatly either laziness
> or a too little time scenario.... I've seen this from time to time.
>
> Cheers
> RicB
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> UiB, Bergen, Norway
> mailto:rbrekne@broadpark.no
> http://home.broadpark.no/~rbrekne/ricmain.html
> http://www.hf.uib.no/grieg/personer/cv_RB.html
>
>
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