[pianotech] WNG jack don't come back no more, no more, no more.....

[Dean May]

I'm having trouble understanding so I'm going to risk asking a stupid
question. Could you or someone explain why the too heavy spring could be the
problem? I understood the complaint to be the jack would not slip under the
knuckle. Seems like too much rep spring tension would assist in holding the
rep lever high to make it easier for jack to return, not more difficult. 

Thanks in advance.

Dean

Dean W May (812) 235-5272 voice and text

PianoRebuilders.com (888) DEAN-MAY

Terre Haute IN 47802


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Thursday, January 19, 2012 8:56 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] WNG jack don't come back no more, no more,no
more.....

On 1/19/2012 7:22 AM, David Stanwood wrote:
> Hi Ed,
>
> I've seen this problem w/WNG and attributed it to a rep spring that is
> too heavy a gauge for the hammer weight.

This makes a whole lot of sense. I've seen this situation in mechanisms 
other than piano repetitions, where the spring rate is too high and the 
adjustment is finessed at the limit of travel to try to make the thing 
(almost) work. When a very small adjustment in the spring makes a much 
bigger than it should difference in the reaction, this is a good indication.

Ron N