[CAUT] Lighter Touchweight

[David Love]

It's possible. I'd dig out the action model and try it but that would mean
I'd have to clean the shop to find it. Maybe it's one of those perceptual
tricks ;-).  

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Chris
Solliday
Sent: Sunday, October 21, 2007 6:13 AM
To: College and University Technicians
Subject: Re: [CAUT] Lighter Touchweight

 

Are you sure that you reduced overall BW? MOre than likely you reduced DW
and increased UW as you reduced scuffing friction at the capstan/wippen
profile when you improved your line. JMHO

Chris Solliday 

----- Original Message ----- 

From: David <mailto:davidlovepianos at comcast.net>  Love 

To: 'College and University <mailto:caut at ptg.org>  Technicians' 

Sent: Saturday, October 20, 2007 11:31 PM

Subject: Re: [CAUT] Lighter Touchweight

 

I guess I'll have to revisit the formulas (or my action model-wherever the
damn thing is).  However, just from an empirical point of view, I have had
success in reducing touchweight slightly by shimming the wippen flange (or
rail) out.  Whether or not it is as effective as moving the stack, I'll have
to take your word for it for now.  Admittedly, it's not a solution I usually
consider for wholesale leverage changes.  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Jon
Page
Sent: Saturday, October 20, 2007 6:46 PM
To: caut at ptg.org
Subject: [CAUT] Lighter Touchweight

 

I disagree that the advantage is taken away at the Knuckle

 

To calculate the ratio of the wippen measure the flange center pin

to the knuckle rep lever contact point (I think at half blow) divide

that by the flange center pin to capstan/cushion contact point.

 

No where is the jack center involved in ratio computation.

-- 


Regards,

Jon Page

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