Ed, Agree! However, the distance the Capstan travels in that "cycle", is, imo, of little direct effect. A bit, of the whole package, for sure, but one of the small players in that package.<G> Joe > [Original Message] > From: Ed Foote <a440a at aol.com> > To: <joegarrett at earthlink.net>; <pianotech at ptg.org> > Date: 9/22/2012 7:18:40 PM > Subject: Re: [pianotech] re; Action Ratio Measuring > > "All actions are subject the accelerating action phenomena to changing > ratios thru the complete range of motion as the capstans is moving > further from the wip center pin and the increasing leverage efficiency > in the wip." > > > Greetings, > From my perspecitve, If the geometry is such that the capstan's point > of contact is in line with the centers of both whippen and hammerflange > at half stroke, the capstan is moving closer to the whippen center pin > for the first half of its travel, and farther away during the latter > half. Hence, the ratio is increasing for the first half, and decreasing > for the second,which is against all that I understand about mechanical > efficiency. > I like actions whose capstan contact point reaches the "magic line" > just at let-off so that the highest ratio occurs at the very last part > of the stroke,where velocity is at its greatest, and the lowest ratio > at the beginning when there is so much mass to put into motion that a > lower speed and higher gear makes sense. > Regards, . > > Ed Foote RPT > http://www.piano-tuners.org/edfoote/well_tempered_piano.html > >
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