Also referred to as the magic line. The line from the key balance rail contact point to the wippen center pin. The capstan/wippen heel point of contact should be on the line at half blow. David Love ----- Original Message ----- From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> To: <pianotech@ptg.org> Sent: July 15, 2002 3:09 AM Subject: Re: Lighter or Heavier ? Hi David Would you mind clarifying what you mean by convergence in your post ? Thanks RicB > David Love wrote: > > Actually I forgot to include my concluding point which is > that the placement of the capstan shouldn't be made on key > ratio alone. There is another factor to consider: > convergence. Though some compromise on convergence will > not get you into too much trouble, a major compromise > might and if it is necessary in order to bring the action > ratio low enough (it's not usually a problem the other > way) then you are probably better off using an assist > spring to correct the problem. > >
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