sticking note puzzler

[Piannaman@aol.com]

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Dave,
 
This one's close enough to be called a winner.  The bridle strap is  hotting 
on the let-off rail regulation screw.  At first I thought the jack  was 
rubbing on it, but it was the strap.  
 
Good job!  Hope this saves people some aggravation in the  future!
 
Dave S.
 
 
 
in a message dated 9/3/05 12:02:48 PM Pacific Daylight Time,  
dporritt@mail.smu.edu writes:

 
Bridle strap not tight enough and gets hooked on the  letoff screw. 
dp 
 
David M. Porritt 
_dporritt@smu.edu_ (mailto:dporritt@smu.edu) 
 
  
____________________________________
 
From:  pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf 
Of  Piannaman@aol.com
Sent: Saturday, September 03, 2005 8:14  AM
To:  pianotech@ptg.org
Subject:  sticking note puzzler
 
Actually, the real  puzzler here is why anyone would conceive and build these 
pianos in the first  place.  A Nordheimer, made in the USSR before  the wall 
came down in '89.   Calling this a PSO is being too  kind.
 

 
What surprised me  in the end was that the problem was really not related to 
the quality--or lack  thereof--of the questionable piano in question.  It 
really could have  happened on any piano, though this was my first sighting of 
this particular  problem.
 

 
Symptoms:   Key plays fine, then suddenly not.  Examination reveals excess 
lost  motion--not between the jack and hammer butt, rather between the capstan 
and  the wippen heel.
 

 
What it  wasn't:  
 

 
tight  center
 
action parts  rubbing together (my first suspect, and what I focused on for 
the first 20  minutes of my trip)
 
Glue dropped on  action  parts
 
anything to do  with the key itself
 
sharp edges on the  jack
 
rough material on  the butt
 

 
As I said, it was  a new one on me.  A simple, but unexpected  problem.
 

 
I'll post the  answer tomorrow if there are no correct guesses.   
 

 
Dave  Stahl




 

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