Lightening touch by changing damper timing redux

[David Ilvedson]

This is a multi-part message in MIME format.

---------------------- multipart/alternative attachment
The tech flambe happens years down the road...and we've all been there.=
..

David Ilvedson, RPT
Pacifica, California






Original message
From: Piannaman@aol.com
To: pianotech@ptg.org
Received: 1/19/2006 3:25:00 PM
Subject: Re: Lightening touch by changing damper timing redux


Having the dampers lift at let-off would definitely be too late.  What =
happens is when you change to lifting the damper when the hammer is, sa=
y, 2/3 of the way to the string is that it is closer to let off and fee=
ls more like a longer, contiguous bump, rather than two separate ones. =
 And as Dean noted, the fingers have more speed at the point where the =
key contacts the underlever.  Makes a big difference.
 
You can always try it on your action model...
 
I'll be doing the warranty tuning on the 1st piano I did this on--some =
6 months ago-- next week.  I'll give a report, and am fully prepared to=
 go become Tech Flambe.
 
Dave S.
 
In a message dated 1/19/2006 1:42:11 P.M. Pacific Standard Time, ilvey@=
sbcglobal.net writes:
Certainly we can make "small" adjustments, but lifting at let-off is a =
way to late for me...

David Ilvedson, RPT
Pacifica, California






Original message
From: Erwinspiano@aol.com
To: pianotech@ptg.org
Received: 1/19/2006 7:32:48 AM
Subject: Re: Lightening touch by changing damper timing redux


    Richard
  Please hear me & with all due respect.  I can feel that .
   Actually, IMHO,  an 1/8 th inch in damper lift timing can make a HUG=
E  difference in action feel especially with high ratio actions.  Frank=
ly it doesnt' concern me what Seiler might think but rather my clients.=

   There is a sweet spot for ,most pianos, & when setting this up  I fi=
nd it most often that spot to be at half travel when the key aciton cyc=
le is at it's most efficient & friction free spot in  movement  Picking=
 up the damper prematurely can increase the feel of touch weight or hea=
vy touch syndrome dramatically on some actions.   I'm always looking fo=
r the optimum sweet spot when setting up a custom balnced action so tha=
t I don't inadvertantly sabatoge all that fiddlin & didlin I just went =
thru to create a very fluid action feel.
  Regards
  DAle Erwin
The damper timing I thought was determined by the manufacturer.  When t=
he key goes down it meets a couple of resistance points.  One, the end =
of the key contacting the damper lift lever (but who can feel that?) , =
and two, the jack contacting the let off button. (which everybody can f=
eel)  Since the contact between the key and damper lift lever is  what,=
 1/8 inch leeway what difference does it really make?  The most importa=
nt consideration is that dampers lift as a unit as the damper pedal is =
depressed so that =93half dampening=94 can be utilized. 
I can imagine asking any of the piano makers including Seiler who show =
up for the National Convention where they prefer the key to hit the dam=
per lever and why.    ---ric   www.pnotec.com 
 
 
Dave Stahl

Dave Stahl Piano Service
650-224-3560
http://dstahlpiano.net/

---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/38/76/39/5d/attachment.htm

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