Touch weight

[Alan McCoy]

This is a multi-part message in MIME format.

---------------------- multipart/alternative attachment
Wim,
 
The difference between DW and UW is friction. Decreasing friction will bring
the numbers closer together, i.e. DW will decrease while UW increases. Those
numbers you have sound fine (for some pianists!). Although I am currently
revising my whole take on this issue. I am working with a faculty pianist, a
great pianist who loves her home Kawai KG-6. She has always said to me that
she likes a heavy piano. Until last week when I finally went to her house to
tune it (a good friend of mine is her regular tech) I had always thought
that I needed to interpret what she meant by heavy. "Because, hell, nobody
likes a heavy action!" Wrong. She loves her piano and it weighs off
generally in the 60-70 range with upweights generally in the 30-35 range.
So.... as I said I am revisiting the generally accepted numbers. I think
that I would rather have a bit higher DW and UW numbers if by doing so I
could use less lead in the keys to achieve less inertia in the action.
Always a trade off.
 
Alan


  _____  

From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of
Wimblees@aol.com
Sent: Monday, December 15, 2003 3:27 PM
To: caut@ptg.org
Subject: Touch weight


I've just done complete down and up weight measurement on the new D. From C1
- F2, the down weight is between 52 and 55 grams. The rest is between 47 and
50, with a few 45's and 46's in the 7th octave. Upweight is generally
between 27 and 30 grams, with some as low as 25 and a couple as high as 34. 
 
The Piano Action Handbook says down should be 51-52 in the bass graduating
to 47 in the treble, with up weights at 20. After Christmas I'm going to
lube all centers and check for pinning. Hopefully I'll get better upweight
measurements. Is this about what you guys are going for? BTW, is TW the
difference between down and up, or am I missing something in the
calculation?
 
Wim 


---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/caut.php/attachments/da/76/ae/05/attachment.htm

---------------------- multipart/alternative attachment--