[pianotech] balance hole jig

[Terry Farrell]

What is "beam height in the key"?

And why does the dowel approach (I presume you are referring to the "S&S Accelerated Action") make regulating a pain (I haven't done many....)?

Thanks!

Terry Farrell

On Jul 26, 2012, at 8:29 PM, Ron Nossaman wrote:

> 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