Scaling progranms-Calculating Technician

[ed440 at mindspring.com]

Jude-
Al Sanderson published a sheet with his scale formulas.  I found it easier to follow than Robert's book.  It's fairly easy to set up a spread sheet using the Sanderson equations.
Of course, since the Sandersons are now selling recalings, he may not be willing to share the information anymore.
But since you're in Dr. Al's neighborhood, you might start by asking him. 
Ed Sutton

-----Original Message-----
>From: Absolute Piano <absolutepiano at comcast.net>
>Sent: Sep 27, 2006 10:47 AM
>To: Pianotech List <pianotech at ptg.org>
>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