U1 hammer butt problem

[Piannaman@aol.com]

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PeeTeeGee,

You might want to look at backcheck alignment with the catchers.  If they 
aren't making proper contact, , i. e., corners of catchers hitting the 
backchecks, the hammers won't check properly. I've seen this more than once.

Dave Stahl

In a message dated 6/2/04 7:18:32 PM Pacific Daylight Time, 
Pianotunaguy@aol.com writes:


> 
> I recently re-flanged my U1 due to bobbling hammers caused by the silk 
> thread which holds the hammer butt spring being broken on about half the flanges.  
> Since that day, I have a new problem with the piano: the jack gets caught 
> under the hammer butt on rapidly repeated notes and blocks the hammer to the 
> strings.  This happens on about 10 to 15 hammers in the middle of the keyboard.
> 
> I checked the backchecks and the hammers are checking at 5/8".  I checked 
> the lost motion and there was enough to allow the hammers to move back with the 
> hammer rail when pulled away from the strings.  There is enough dip to allow 
> the jack to letoff.  



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