Scaling progranms-Calculating Technician

[Michael Spalding]

Jude,

You can find the original Journal articles in the 20-year CD set.  

Mike


----- Original Message ----- 
From: Absolute Piano 
To: Pianotech List
Sent: 9/27/2006 9:47:26 AM 
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 
To: Pianotech List 
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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