Steinway action noise

[Greg Newell]

Jon,

                Based on your pics and description I have a NYS&S flange and
shank. The centers, however, aren't a white felt. Or is that a picture of a
Teflon setup? We've already established that the hammers are S&S. Perhaps
they were pre-hung. I wonder then, if the wippens aren't from the same
place. It would make sense since if the previous tech were price shopping he
wouldn't, likely, have ended up with anything from NY. 

                Your posts here represent a fair amount of work as has
others on this topic. I'd like to express my deep appreciation for all your
help! I'll continue to play with this as the days go by but I'm afraid I'll
not be as timely with much of the investigations that this forum demands.
Please excuse my lack of timeliness. There's just a great deal going on
right now. 

                It looks as if I'll be shimming wippen flanges even more
than 3 thicknesses of traveling paper to get something that I can regulate.
Moving of the rails doesn't seem too plausible but I'll give it some
thought. I think that John D's post established that the parts are indeed
different from the old ones. And further that there is no new ones made that
replicate the old sufficiently. That means I'm stuck with shimming even
though I'd rather not. Is there something that I should do to permanently
affix the shim? 

                Meanwhile back at the ranch I found that the front key pins
had been turned and that I need to re-bush. I also found some stripped frame
screw holes for the stack and 2 of the glued in rail support blocks are
split. More and more to play with every time I look at it. 

                Thanks to everyone for their collective help on this animal.
I don't know what I'd do without you!!!

 

All the best,

Greg

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jon Page
Sent: Sunday, November 18, 2007 10:48 AM
To: pianotech at ptg.org
Subject: Steinway action noise

 

>And once I ascertain the
profile is there somewhere you can point me
>so I know which is which?
 

Attached is a group of flanges, Left to right:
Hamburg S&S, Tokiwa, NY S&S, Abel, Renner

Notice the drop screws:
HSS & Tokiwa have round heads w/ Tokiwa spade end.
NYSS, Abel, Renner have a hex-drive shape.

Depth of profile decreases l to r along with
slight shape changes. Renner has a flat center.

>Even with a few properly regulated keys I still get a
little
>jack slap. I know that I could simply put a thicker felt in the jack
window
>but what I'm really after here is why this is happening. Is there a
better
>way to go about this than simply shimming things?
 

With the spread being so close, the capstan is lifting
too close to the flange center (fulcrum) thereby causing
the front of the wippen to travel through too great a distance.
Shimming the flange back, maybe even with one below the
screw and two above, will decrease this travel and not cause
the jack to hit the flange.

Thicker stop felt will place more stress on the jack glue joint because
it is being bound between the letoff button and stop felt. You need
to reduce the jack's travel by shimming the wippen flange and maybe
increasing blow distance and maybe even decreasing dip.

BTW those backchecks looked to be leaning back at too great of an angle.

Regards,

Jon Page

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