Downbearing gauge

Mike McCoy mjmccoy@usa.com
Fri, 11 Jul 2003 19:06:05 -0400


Ron, Joe and those who have made downbearing gauges,

Rookie downbearing questions...

What would you consider an ideal design using a dial indicator? Pics??
How long a spread from end pin to end pin? 
Dial at one of the ends or in the middle?
How much bearing should I shoot for? Depends on the season also I'm sure.
How much bearing is too little? 1/32 or less? 
Too much?? This would cause difficulty tuning or possibly bridge cant I would guess?

Mike

Mike McCoy RPT
Chapters 170 & 190 PTG
Langhorne, Pa
mailto:mjmccoy@usa.com



----- Original Message ----- 
From: "Ron Nossaman" <RNossaman@cox.net>
To: <davidlovepianos@earthlink.net>; "Pianotech" <pianotech@ptg.org>
Sent: Friday, July 11, 2003 6:17 PM
Subject: Re: Downbearing gauge


> 
> > > Not possible, since the degrees figured from this sort of gage depends on
> > > the pin row spacing on the bridge...
> >
> >That makes sense, of course.  Didn't think about the effect of varied
> >spacing.
> 
> There is one thing. The three legged gage type with a solid pin at one end, 
> one in the middle, and the dial at the other end can get pretty close to 
> giving you meaningful measurements with the two legs on the speaking or 
> rear duplex and the dial plunger on the bridge segment. Wrapped strings are 
> a problem with these though.
> 
> Bubble is better.
> 
> Ron N
> 
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