Bridge Centering?

[Farrell]

That's what I was asking about Ron. The pins in the picture were way out at the front edge of the bridge up around note 88. I was asking if the bridge was undercut up there as most are - here being the danger of cutting under the line of pins.

Terry Farrell
  
----- Original Message ----- 
From: "Ron Nossaman" <RNossaman@cox.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, June 03, 2003 2:00 PM
Subject: Re: Bridge Centering?


> 
> >Here's a question for Del, Ron N or Ron O: Should the area of contact, on
> >the bridge, ideally be centered on the Bridge? Or, does it make one wit of
> >difference to have this area favor the front, center or back of the bridge?
> 
> I don't think it really matters from a performance standpoint. For most of 
> the bridge, I try to center the unisons just to get as much wood around the 
> pins as possible for support, and for looks. In practice, they don't always 
> get centered. I off center forward in the treble to get the bridge 
> footprint away from the belly bar. The thing to avoid is undercutting the 
> bridge beyond the front pin row in the treble end or string bearing will 
> twist the end of the bridge forward.
> 
> 
> >I've been more conscious of the "mis-alignment" of individual notes, (front
> >to back), in "top-end" pianos, of late. It appears to me that the bridges
> >could/should have been shaped more efficiently, to accomodate the "supposed"
> >scale, in relation to it's physical contact, in order to cause a more even
> >"downward pressure" on the bridge surface.
> >
> >Bests Regards,
> >Joe Garrett, RPT, (Oregon)
> 
> Again, I don't think it makes any real difference as long as the bridge is 
> supporting to the soundboard, directly under the load. If the bridge was 
> straight, it would be of more concern structurally, but the bridge is 
> curved and won't rock like a straight one would.
> 
> It is interesting though, isn't it, to see the differences between scale 
> shape and bridge shape?
> 
> Ron N
> 
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