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New Action Design - Basics Spreadsheet

 

First sheet: Action Design Analysis

  1. Enter your piano datas:
  • Brand, Model, Serial Number
  • Number of sections
  • First and last note number of each section
  • String heights
  • String angles
  • Shank Lenghts
  • Strings angles compared to the keybed
  • Hammer head total lenght
  • Actual Rake
  • Actual Bored lengths
  • The hammer center-pin height
  • The wippen's type
  • The pinblock height

The calculation will give you: 

  • The angle of the hammer with the strings.
  • The tail lengths
  • The number of notes per sections
  • The first and last note of each section
  • The recommended spread
  • The recommended center-pins heights distance

 

Your datas will be used to calculate the second sheet.

 

2nd sheet: Hammers boring and weighting datas

  • Enter the new hammer center-pin height. If the distance is too close to the pinblock height, the cell will light up red. 
  • Choose your over-centering: usually 0 to 3 millimeters
  • Select your hammer strike weight or hammer weight curves (1 to 13).
  • Choose your hammer total lengths according to the tail lengths

The following datas will be calculated:

  • The bored lengths
  • The rake (it takes into account the angle of the strings)
  • The average tail lengths

 

3rd sheet: Hammer weighting

  • Choose wether you prefer to work with strike weight or hammer's weight by selecting it. 
  • Enter your actual hammers weight or actual strike weight.
  • It calculates how much weight you need to add or withdraw.
  • You can also enter the number on your hammer head. It might differ from the actual note number. 

 

4th sheet: Key's leveling

Enter the following datas according to the drawing.

  •  Key's horizontality: Select Horizontal down way, Horizontal Half Way, Horizontal at rest
  • Key's front lever
  • Key's dip
  • Key's thickness without the key top
  • Balance rail height on top of the punshing
  • White Key top thickness
  • The ebony thickness
  • The overall black key thickness

 

It calculates: 

  • The white key's height at rest
  • The black key's height at rest
  • The key's angle at rest 

 

5th sheet: Action Ratio, Strike Weight, and Leverage - Calculation

1. Action leverage

You need to measure: 

  • The hammer rise with a 6 mm key's dip

It calculates

  • The action leverage for each key measured

 

2. Strike Weight Ratio

  • Enter all your different weight

It calculates the strike weight ratio

 

3. Geometric ratio

  • It calculates the geometric ratio according to the geometry of the parts

 

and even more features to come!

 

Action Design Basics Spreadsheet

CHF99.00Price
  • Copyright FJV Piano Design - FJ Vincent. This spreadsheet is for your own use. You are not allowed to share it with anyone, or resell it. 

© 2023 par FJV Piano Design

info@pianodesign.ch

+41 (0)79 640 06 82

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