Action modification results, correction

[Jon Page]

>Then the final survey (e) might have appeared something like this: 
>30,46,38,11,9.9,29,5.9]

Accounting for friction in the hypothetical touchweight (e - (b - 
c)):  27,49,38,11,9.9,29,5.9
I'm sure everyone caught that...

http://www.ptg.org/pipermail/pianotech/2007-February/201449.html
a. original survey
b. Reshape hammers/taper/re-arc tails
c. move knuckles out 1mm on shank to 18.5mm
d. move stack back 3mm
e. alter FW to target 38 BW

Survey of C4
     UW  DW  BW  F   SW   FW  SBR
a  32   60    46  14  10.9  32    6.4
b  26   52    39  13    9.9  32    6.3
c  24   44    34  10    9.9  32    5.8
d  22   38    30   8     9.9  32    5.4
e  30   46    38   8     9.9  24    5.4

Reasoning that the knuckle relocation (c) resulted in a BW & SBR reduction of 5
and a friction factor reduction of 3 (b - c), it's a safe bet that 
the outcome (e)
would have reflected the loss of the gains from that procedure had knuckle
relocation not been done.  %

So had I relocated the stack before relocating the knuckles, I might have been
torn as to how far I wanted to get into it.  I am happy with the 
results and probably
would have move the knuckles anyway. I never let the thought of a 
little extra work
stop me before.

But knowing these results can influence your actions to achive the 
biggest-bang-for-the-buck.

It's amazing what a little extra effort can do for an action and I 
never can think of a good answer when a customer asks, "Why wasn't it 
like that from the factory"?

However my response to: "How did you do that"??
"Elfin Magic".
-- 

Regards,

Jon Page
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