New Action Design - Basics Spreadsheet
First sheet: Action Design Analysis
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!