Inertia, was "Grand Touch"

[Absolute Piano]

Good point Mike. One of the factors that I perceive in keyboards that annoy 
me is if the keystick feels like a spring board. I perceive more control in 
a stiff key. Whether this is the material, moment of inertia or both is 
something I don't often hear discussed in terms of noticing, measuring, or 
accounting for and yet it is another one of the many important components of 
touch.

Jude Reveley, RPT
Absolute Piano Restoration, LLC
Boston, Massachusetts
----- Original Message ----- 
From: "Michael Spalding" <spalding48 at earthlink.net>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Thursday, July 13, 2006 9:31 AM
Subject: Re: Inertia, was "Grand Touch"


> Jude,
>
> I think it's great thatyou will be testing this experimentally.  One 
> factor
> you might want to look at is how the lead holes in the keystick affect its
> flexibility.  It seems to me that a keystick with several large led holes
> close to the balance pin would flex more on a hard blow than one with 
> fewer
> or smaller holes further away from the balance pin.  Looking forward to
> hearing and discussing y our results.
> \
> Mike
>
>
>> [Original Message]
>> From: Absolute Piano <absolutepiano at comcast.net>
>> To: Pianotech List <pianotech at ptg.org>
>> Date: 7/12/2006 9:02:37 PM
>> Subject: Re: Inertia, was "Grand Touch"
>>
>> Thanks Vladan and all for all the info.
>>
>> There is a lot to chew on. My interest is in the practical application.
> Why
>> is it that two keys with the same balance weight and the same front
> weight
>> but leads arranged differently seem to me to feel the same?
>>
>> I ask because I had a customer that asked me to place all the leads
> closer
>> to the front and to use less leads after I had already set up the FW to
> my
>> specification in a new keyboard using a tower pattern nice and close to
> the
>> balance rail. I went through all the trouble but as far as I or anyone
> else
>> could tell the action felt the same.
>>
>> I'm in the process of building several action models to test the science
> as
>> I am slowly digesting it so you are all being quite helpful.
> Unfortunately
>> with reality hanging over me it may take awhile to report back any
> results.
>>
>> Best,
>>
>> Jude Reveley, RPT
>> Absolute Piano Restoration, LLC
>> Boston, Massachusetts
>>
>
>
>
>