Lighter or Heavier ?

[David Love]

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.
>
>