Great explanation Ron. Al Guecia -------------------------------------------------- From: "Ron Nossaman" <rnossaman at cox.net> Sent: Saturday, August 30, 2008 6:53 PM To: "Pianotech List" <pianotech at ptg.org> Subject: Re: Loading the tuning pin > >> William, >> >> Thank you for your quick response. You are spot on with what I >> thought the instructor meant, but I was not real sure if I was >> interpreting it correctly. In fact I believe he used the term in the >> context of leaving a performance piano with the pins loaded. >> >> I could not agree with you more in my limited experience, I feel much >> more comfortable leaving all things equal and set, or as you stated at >> "equilibrium". When I know or think I know a pin is set I don't want to >> mess with loading it. This could go with the current thread on floating >> the pitch. If you think the pitch may change by performance time, tune >> it sharp or flat by your estimates with the pins set not loaded. >> >> Thanks again for your insight on this matter. >> >> Steve Blasyak RPT > > I'd like to clear up a point of basic physics here. You're not > leaving the pin with no twist in it, you're ideally leaving it > with whatever twist it takes to counter the opposing twisting > force from string tension. That's the equilibrium you're > after. You have no way to tell what twist is still in the pin > because you can't measure it directly. The only indications > you get are what you feel, and what you hear (or see on your > ETD) as the string pitch changes. When you leave the pin at a > point where it takes the same or very slightly more force on > the tuning hammer to lower pitch X amount that it does to > raise pitch by X amount, you're in the ball park. At that > balance of forces, the pin will be left with some twist, but > will be in balance with string tension. > Ron N >
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