Scaling programs-Calculating Technician

[Richard Moody]

You can have Calculating Technician for only a pre paid envelope with a
dollar inside.  That is unless someone else wants it for two bucks.   The
formulas and equations in there are good, I just happen to like McFerrin
better     ----ricm   

 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Absolute Piano
Sent: Wednesday, September 27, 2006 9:47 AM
To: Pianotech List
Subject: Scaling progranms-Calculating Technician

 

The Calculating Technician is out of print. Does anyone have a copy that I
could beg, borrow or steal? On this topic, I've heard that the calculations
(or the approach) are not quite right. I wouldn't know but would be
interested in hearing any comments? Besides you gotta start somewhere.

 

Jude Reveley, RPT
Absolute Piano Restoration, LLC
Boston, Massachusetts

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

From: Jason Kanter <mailto:jkanter at rollingball.com>  

To: Pianotech List <mailto:pianotech at ptg.org>  

Sent: Tuesday, September 26, 2006 5:49 PM

Subject: Call for scaling spreadsheets

 

List

If any of you have and are willing to share your scaling spreadsheets -
please send to me. In response to Ric Brekne's recent suggestion, I am
offering to use my Excel skills to take a crack at making a nice,
user-friendly, efficient graphing spreadsheet that we can all use to improve
our study and understanding of this area of the craft. I will compile the
best ideas and hopefully come up with something really useful.

 

I don't presently know much about scaling, but I do know Excel and have
access to the "Calculating Technician" Journal series where a lot of this
was discussed.

 

What do you measure, and what formulas do you apply, and what are the
dependencies, constraints and limits? The parameters suggested by Ric
include:

 

Inputs:   

Diameters 

lengths 

type of string material?

 

Outputs:

inharmonicity 

tension

breaking point % 

frequency.

 

For bass strings:

how do you deal with wrapping?

 

And since we will no doubt be looking to improve scaling, what kinds of
what-ifs would you like to automate?

 

I am proposing this as a volunteer project, the output to be freely
available. Maybe that idea creates difficulties since it might "compete"
with commercially available programs. If that's an issue, let me know and
we'll think about it.

 

Jason

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