[pianotech] Hammer Line Issue

[Jeff Deutschle]

Barbara:

The hammer rail wasn't moved back, the action was swung out. I guess
this created some lost motion. Then bobbling hammers was brought up
and the thread went south to the damper springs.

On Mon, May 11, 2009 at 10:18 AM, Barbara Richmond <piano57 at comcast.net> wrote:
> I haven't been following too closely, and maybe someone brought this up, but
> how would moving the rail back make hammers--that were already off the
> hammer rail--rest on it?
>
>
>
> First, what was the pattern of hammers off the rail?
>
>
>
> Then I could rule out possibilities---
>
>
>
> 1. The hammer rest rail cushions need beefing up.
>
> 2. Climate change affecting the keybed.
>
> 3. Critters or something else screwing around with/rearranging/leaving extra
> stuff on/ the back rail felt.
>
> 4. Somebody (who didn't know what they were doing) was in there trying to
> adjust the capstans.
>
>
>
> ???
>
>
>
> I'd have to go back and read to figure out how we got to the damper spring
> thing.  But, yes, Ed, even really, really strong damper springs have been
> neglected by technicians for eons--at least in my neck of the woods.
>
>
>
> Barbara Richmond, RPT
>
> near Peoria, Illinois
>
>
>
>
>
>
>
> ----- Original Message -----
> From: "Ed Sutton" <ed440 at mindspring.com>
> To: pianotech at ptg.org
> Sent: Monday, May 11, 2009 4:15:20 AM GMT -06:00 US/Canada Central
> Subject: Re: [pianotech] Hammer Line Issue
>
> 
>
> Here's Matthew's first post:
>
>>I went to tune a clients piano today.  It is a Kawai Console, year 1986.
>
>>The very first thing I noticed was the hammer line was totally screwed up.
>> Some of the hammers were resting on the rail, and others were off the
>> >rail.  I unscrewed the action bracket nuts and pulled the action back a
>> little until all the hammers were resting on the rail. "
>
> What is the likelihood that the piano had overly strong damper
> flanges, un-noticed for 22 years ?  The customer didn't complain of bobbling
> hammers. That problem occurred after Matthew adjusted the capstans and
> let-off. We are into the second or third stage of treatment without
> diagnosis.
>
> ES
>
>



-- 
Regards,
Jeff Deutschle

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