[pianotech] Retrofitting a Steinway w/adjustable back action

Ron Nossaman rnossaman at cox.net
Mon Jun 29 20:49:31 MDT 2009


Delwin D Fandrich wrote:
> | How does this work, geometrically? I'd really appreciate 
> | other options, as they fit with physical reality. Please give.
> | Ron N
> 
> It doesn't.


So... Then what might be the point of spoons on damper under 
levers? As a manufacturing expedient, in a piano designed for 
them, I can see where it gives a quick final touch up of key 
damper lift timing without disturbing alignment or pedal lift 
timing. That could be a potentially good thing (depending on 
how sloppy the rest of the regulation process was), but is 
that important enough to anyone to go to the trouble of making 
them fit in the available space in a retrofit? It seems to be 
a tad wide of my priorities, but do any of you out there find 
a tenth of a millimeter or less difference in key damper lift 
timing worth spending time and angst on? If so, why? I 
understand the pedal thing, so please don't go into lengthly 
explanations on the question I didn't ask. I'm asking about 
key lift.

I know I probably don't really want to hear the answers, but 
the last several weeks of list traffic has numbed any illusion 
of survival instincts and judgment I might have otherwise 
entertained. So please, anyone, enlighten me.

Ron N


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