Piano Key Inertial Balance

[Richard Brekne]

Fine design John. 

I see from other photos Mark had that you used one of those rollers that
comes from Schaff.. included in the Stanwood kit. 

Me likes !
ricB

John Hartman wrote:
> 
> Here is a photo of my take on this.
> 
> Thanks Mark.
> 
> Mark Davidson wrote:
> > RicB wrote:
> >
> >>Maybe Mark will find this a good time to make public his key MOI
> >>measureing device. Open sourced... we can collectively refine it to a
> >>useable and easy to build yourself tool. That way more of us can work on
> >>this puppy
> >
> >
> > Alrighty then.  Here it is.. spell checked and everything.  I'm sure
> > there'll be many questions - don't hesitate to ask (just please read it all
> > the way through first). Exact measurements for the most part are not
> > critical so not many are included.   Oh yeah, and I used the word "inertia"
> > loosely throughout to mean the moment of inertia, so just get over it.
> >
> > http://home.mindspring.com/~mark.davidson/inertial_balance.htm
> >
> > -Mark
> >
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
> >
> >
> 
> --
> John Hartman RPT
> 
> John Hartman Pianos
[link redacted at request of site owner - Jul 25, 2015]
> Rebuilding Steinway and Mason & Hamlin
> Grand Pianos Since 1979
> 
> Piano Technicians Journal
> Journal Illustrator/Contributing Editor
[link redacted at request of site owner - Jul 25, 2015]
> 
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