[CAUT] hammer line

[reggaepass at aol.com]

Jon,

Thanks for pointing this out.? It is something I had not previously considered and what you say about how the variation in knuckle height affects regulation makes sense.

Alan Eder


 


 

-----Original Message-----
From: Jon Page <jonpage at comcast.net>
To: caut at ptg.org
Sent: Sat, 1 Mar 2008 4:29 pm
Subject: [CAUT]    hammer line












>Varying heights on knuckles will have the
wippens at different rest heights.


>Anything we can do to standardize parts and
motion is a plus.






A
equal elevation and range of motion is what I'm talking
about.






Is it
possible that Ed Foote's approach to an even after touch, by
altering


each
hammer blow distance, a means to put the wippens' elevations on
a


more
even keel and that it's the uneven knuckle height which
causes


the
hammer line to be askew?? Blow distance does not alter point
of


Let
Off but knuckle height certainly does, so the L/O stays the
same


due to
the geometry of that particular execution.









I want to bring this up again because it is something not
considered


beyond an overall knuckle size.






A set of shanks will have knuckles at various heights, meaning
the distance


from the shank to the end of the cover. Sometimes as much as 1mm
with


varying distances sprinkled throughout.






A shank with a 'taller' knuckle (or maybe it wasn't pressed in as
far) will


have the wippen resting at the lower elevation than its neighbor
with a


'shorter' knuckle for the hammers to be at the same height. This
lower


wippen will have to travel through a slightly greater distance to
reach the


Let Off button and consequently attenuating the after
touch.






My contention is that even knuckle heights will produce a more
even


after touch. It will also produce a more even Let Off button line
due to


the more even geometry or shank ratio. I have proven it on
many


installations.




Regards,



Jon Page


 

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