touch weight

[Vince Mrykalo]

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You must break the "static friction" first in order to get a reliable reading.

At 10:59 PM 3/23/99 -0500, you wrote:
>
>Up weight is measured by placing a likely weight on the key, pressing
>the key down to let-off and using your fist hit the action lightly to
>break the static friction of the action parts.  


>This means that up-weight, and perhaps down-weight, are meant to
>correlate to sliding friction, not static friction.  Is this
>a generally accepted definition?  Or do some of you measure
>up and down weight without tapping the action to break the
>static friction?  I would like to know because I am considering
>the design of a device to automatically measure touch weights
>for each note, and it won't be right if I don't have the
>the definition exactly right.
>
>-Bob Scott
> Ann Arbor, Michigan
> 
Vince
<mailto:vince@byu.edu>
Visit the web page for the Pacific Northwest Conference at: 
<www.pnwpianoconf.com>  
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