[pianotech] balance hole jig

[Ron Nossaman]

On 7/26/2012 7:15 PM, jim at grandpianosolutions.com wrote:

> yeah, so if I were keeping the shoe in the original keyboard re-design 4
> years ago, just extending the jig would have worked fine...but that
> ain't what I was up to back then.

Got it.


> While we're on the subject, you bring up something I've been thinking
> about regarding the fulcrum point at the balance pin/hole. So many
> balance rails have the key rotating in a very complex inefficient manor
> in a rocking/chucking motion instead of a true pivot, accentuating the
> required breakaway force at the start of the stroke. I've only dealt
> with the half round dowels once so far. Seems like a good idea.

It mostly is, I think. The key doesn't slither up and down the pin as it 
rocks on a flat punching, but rather pivots nicely on the dowel.


>On a
> short key stick, as opposed to the long D sticks I think you're talking
> about, what are the down sides of the half dowel?

Other than the loss of beam height in the key, and the pain in the butt 
regulating them, they seem to be quite functional.

Ron N