Nicks program does not yeild the same BW result that Stanwoods formula does. It is based on Pfieffers formula unless I am mistaken and results in a different ratio quantity. It can be used as a reference for sure... but it will not yeild the Balance Weight Ratio as it does not take into consideration any angles of any of the parts in any given position. It simply breaks the levers down into three individual ratios as free standing levers, and multiplies the results together. It can give you a general idea, but remember if you move either the knuckle or the capstan.. you are essentially really moving the jacktop and whippen cushion respectively as well. Cheers RicB Ed Sutton wrote: >Alan- > >Nick Gravagne has a program for sale to do what you want. He offers 2 >weeks' free trial. <http://home.att.net/~nickware/action.htm> > >I haven't tried it, but it looks good. > >Some pianos may work better with different capstan lines for naturals and >accidentals. > >In the end you will have to do practical trials anyway. I have a capstan on >a block of wood on the end of a stiff wire. I can fish quickly to get some >rough ideas of what will work. > >Also, some light go bars over the bench make it faster to pull and replace >the stack > >Please let us know how it goes if you try Nick's program. > >Ed Sutton > > > > >>[Original Message] >>From: Alan McCoy <amccoy@mail.ewu.edu> >>To: College and University Technicians <caut@ptg.org <caut@ptg.org> >>Date: 10/19/2004 5:58:21 PM >>Subject: Re: [CAUT] Moving capstans >> >>Hi Chris, >> >>I know the formula for R, etc. I could also just physically move a capstan >>and recalculate. The question though is how to predict the change in BW >>resulting from moving a capstan or knuckle, before actually moving it (as >>per the analysis sheet). >> >>Alan >> >> >> >> >>>From: Chris Solliday <solliday@ptd.net> >>>Reply-To: "College and University Technicians <caut@ptg.org>" >>> >>> ><caut@ptg.org> > > >>>Date: Tue, 19 Oct 2004 16:43:31 -0400 >>>To: "College and University Technicians <caut@ptg.org>" <caut@ptg.org> >>>Subject: Re: [CAUT] Moving capstans >>> >>>SR= BW+FW-(KRxWW) divided by SW the rest is simple math. >>>----- Original Message ----- >>>From: "Alan McCoy" <amccoy@mail.ewu.edu> >>>To: "CAUTlist" <caut@ptg.org> >>>Sent: Tuesday, October 19, 2004 4:28 PM >>>Subject: [CAUT] Moving capstans >>> >>> >>> >>> >>>>Hi Folks, >>>> >>>>I'd like to pick some of your brains about a problem action. I thought >>>> >>>> >it > > >>>>might help the discussion to include my spreadsheet, but the list >>>>administrator thought it better to separate the attachment. If you want >>>> >>>> >>>to, >>> >>> >>>>please go to http://www.ptg.org:1406/files/20041019125312.xls for the >>>>worksheet. >>>> >>>>Is there some way to calculate how much BW will change when moving >>>> >>>> >either > > >>>>the knuckle or the capstan? Or does anyone have enough experience/data >>>> >>>> >for > > >>>a >>> >>> >>>>rule of thumb for this calculation? >>>> >>>>Comments? >>>> >>>>Thanks. >>>> >>>> >>>>-- Alan McCoy, RPT >>>>Piano Technician >>>> >>>>Eastern Washington University >>>>119 Music Bldg >>>>Cheney, WA 99004 >>>> >>>>(509) 359-4627 >>>>amccoy@mail.ewu.edu >>>> >>>> >>>> >>>> >>>>_______________________________________________ >>>>caut list info: https://www.moypiano.com/resources/#archives >>>> >>>> >>>> >>>> >>>_______________________________________________ >>>caut list info: https://www.moypiano.com/resources/#archives >>> >>> >>_______________________________________________ >>caut list info: https://www.moypiano.com/resources/#archives >> >> > > > >_______________________________________________ >caut list info: https://www.moypiano.com/resources/#archives > > >
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