[pianotech] Action Ratios

[David Love]

Has to do with where the energy comes from and goes just to be sure you're
being consistent with the ratio orientation.  Key in is the distance from
key front to balance rail, key out is balance rail to capstan contact;
wippen in is capstan to wippen center, out is wippen center to knuckle
contact point (balancier); shank in is flange center to knuckle contact and
out is knuckle to tip of hammer or shank hammer center line (I see it done
both ways and I'm not really sure why one over the other).  

 

David Love

www.davidlovepianos.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Joseph Garrett
Sent: Tuesday, January 05, 2010 2:00 PM
To: pianotech
Subject: Re: [pianotech] Action Ratios

 

David Love submitted a formula: " 

(keyout/key in) x (wippen out/wippen in) x (shank out/shank in) = (blow

distance - letoff)/(key dip-aftertouch)"

 

David,

Please explain the Keyout/keyin, wippenin/wippenout and shankout/shankin
terms. Either I've been sleeping too much lately or those are terms I've
never encountered. (Probably the former.<G>

Regards,

Joe

 

 

Joe Garrett, R.P.T. (Oregon)

Captain, Tool Police

Squares R I

 

 

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