[pianotech] center pin function

[Dean May]

It all depends on your point of reference, actually. We operate under the
presumption of the earth is a stationary reference point. But it is
certainly in continual motion.

In a grand, if your point of reference is the shank, then the pin moves. So
perhaps, to be picky, we should say the pin should be stationary with
reference to wherever the birds eye is. 

Dean

Dean May             cell 812.239.3359 

PianoRebuilders.com   812.235.5272 

Terre Haute IN  47802

 

Keith McGavern wrote:
> Dear persons,
> 
> I found this an interesting question as well as a response.
> 
> My understanding and practice to date dictates that when the center pin 
> is pinned properly, the center pin does not move or rotate at all.
> 
> I am fairly certain that is what Al meant to say, but semantics may have 
> got in the way.
> 
> Keith