[pianotech] Vertical Touchweight

Floyd Gadd fg at floydgadd.com
Tue Jul 7 05:00:56 MDT 2009


Whether or not Crescendo punchings are the perfect choice, I've discovered
that the front rail punchings do exert a very significant influence on the
feel of the piano.  The original punchings in this piano were simply too
soft.  Who knows -- I might have been just as pleased if I'd substituted in
used punchings from that 90 year old Doherty whose plate went "snap" on me
as I tuned it a few months back . . .

Floyd


David Love said:

FWIW I've had very mixed reactions to the Crescendo punchings.  In terms of
regulation they provide a nice crisp sense of the regulation however, some
pianists have complained that they're just too damned hard and their fingers
end up getting sore.  I've changed a few sets out (or back) to the softer
more traditional style.  Others haven't noticed.  Admittedly, no one has
really said "Wow, those punchings are really great!".  For me personally, I
find them too hard.  I do sometimes wonder if their perceived benefits
aren't more for technicians who are more concerned with achieving exact
regulation standards than for pianists who actually have to play on them.

I have found another use for them, however. Glue them to a leather trapwork
disk and drill an 3/8" hole through the punching down to the leather and
when glued to the bottom of the damper tray and top of the damper trapwork
lever opposite they make very good female receptors for the modified 3/8"
wooden pitman when you are opening up the hole through the keybed on a
Steinway so you can get rid of those noisy brass ones that squeak and squawk
against those keybed bushings (follow that?).

David Love
www.davidlovepianos.com





Hi David,

I meant that the change in the front punchings alone made a huge difference
to the feel of the piano.  I installed the Crescendo straights, which is
what Jurgen Goering recommended to me for an upright piano.  The first work
I did, other than some very preliminary hammer shaping, was on the
keyboard -- reconditioning, lubricating and regulating key height, level and
dip.  It was not until I got to setting the dip that I began substituting in
the new front rail punchings, so I was able to get a very clear "before and
after" evaluation as I worked my way up the keyboard.

Mark Cramer has suggested to me that a crisp escapement and a firm landing
work together to give a precise sense of aftertouch.  This project has given
me some insight into what that means under the fingers, even though the
postential for a feel of crisp escapement in this instrument is somewhat
limited.

Floyd




David said:

Floyd, your mention of the Crescendo punchings used on an upright is
interesting - I've wondered myself if it would make much difference; the
mentions on here seem to have been in relation only to grands.

When you said "what a difference!" did you mean specifically from the
Crescendo punchings, or from all the other bits too that you mentioned?



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