Yamaha U1 touchweight

[Lance Lafargue]

These last two posts refer to whippen/key leverage.  You can tilt the action
changing the whippen felt to capstan contact point which will change
touchweight.  On Baldwins and other brands where the action sits on thinner
posts, you can actually bend the post front to back changing the leverage.
We're talking slight. This works.  However, on the Yamaha's this is
impossible (short thick stubby screw on a wooden base) without removing the
post and the wooden base it sits on (filling screw holes and redrilling) and
repositioning the base itself in new screw location.  This process makes it
hard to experiment with different positions.  Again, it works.  By tilting
the botton of the action away from the key the action is heavier..like
pushing someone further out on a seesaw.  But we're not talking much, keep
an eye on whippen felt to capstan contact through the stroke and consider
wear, etc.  I do not believe this affects repetition.  The solder idea has
worked well, too.  Have fun, but be cautious!

Lance Lafargue, RPT
Mandeville, LA
New Orleans Chapter, PTG
lancelafargue@bellsouth.net



-----Original Message-----
From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf
Of Kristinn Leifsson
Sent: Friday, November 03, 2000 5:34 AM
To: pianotech@ptg.org
Subject: Re: Yamaha U1 touchweight


What about this,

for increasing leverage on the *whippen*, manipulate the capstan wire (if
present) in such a way that the capstan touches the whippen closer to you
than it did before.
Would you think this to be a bad idea?
It wouldn´t have to be really tipped or anything but I wonder if this would
increase the wear and tear on the overlying felt.


Best regards,

Kristinn Leifsson,
Reykjavík, Iceland



At 11:50 3.11.2000 +0100, you wrote:


>A trick I just ran into has to do with foosking around with the balance
>point of
>the key. As I understand it if you want to increase leverage (lighten
touch)
>take a half of a felt balance rail punching and glue it on balance rail
around
>the back side of the balance pin. If you want to decrease leverage (heavier
>touch) do the opposite. Have never tried this so I have no idea how it
works.
>--
>Richard Brekne
>RPT, N.P.T.F.
>Bergen, Norway