hammer "throw" on hard blow

David Ilvedson ilvey@sbcglobal.net
Sun, 28 Aug 2005 12:06:28 -0700


True!

David I.



----- Original message ----------------------------------------
From: Farrell <mfarrel2@tampabay.rr.com>
To: Pianotech <pianotech@ptg.org>
Received: Sun, 28 Aug 2005 11:18:54 -0400
Subject: Re: hammer "throw" on hard blow


>Or, it could be the case where the pin is snug on one side of the flange 
>(one bushing), but is quite loose on the other side (other bushing). Such a 
>situation could give good gram resistance values and a good swing count, yet 
>still wobble all over the place on a hard blow.

>I wonder also if it could be the wippen flange. If the wippen flange wobbled 
>on a hard blow, the jack could be pushing just a hair over on the butt 
>leather - up on the ridge from where a depression has formed over the years 
>where the jack normally hits. That way it would be pushing only on one side 
>of the butt on a hard blow. Maybe?

>I'd check all that pinning real close.

>Terry Farrell

>----- Original Message ----- 
>From: "David Ilvedson" <ilvey@sbcglobal.net>

>> I'd check that pinning again...what's OK in your book?   If you are just 
>> checking swings or gram resistance you might not be considering it is 
>> loose in the birdseye and tight in the bushing.   Pop out a center and 
>> check the birdseye and repin a problem hammer.
>>
>> David I.
>>
>>>Cy Shuster wrote:
>>
>>>> Could it be caused by unequal friction on each side of the bushing?
>>>>
>>>> --Cy Shuster-- 


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