B 458198, string deflections

Ron Nossaman rnossaman@cox.net
Thu, 22 Sep 2005 11:43:37 -0500


> Judging from this picture the severe indentation and the slightly angled 
> indentation that leads to the new string position, it appears as if the 
> migrating pins were caused by very aggressive string seating.  In other 
> words, someone actually banged the string down so hard at the pin that 
> they moved the pin.  If that’s the case, then it’s not likely that the 
> pins will keep moving (especially since some of the lateral force is 
> being taken up by the bridge cap itself and the groove in which the 
> string is riding.  

I hadn't noticed that, but it does look that way.


> I’m not sure I 
> follow how this would effect the crown of the soundboard. 
> 
> David Love

As soundboard crown diminishes, the long bridge rotates forward, and 
left, as a consequence. I can't help but think that a net left side 
bearing like that will put even more load on a soundboard that's 
already overloaded by design in that area. It might not be a 
significant factor in practice, but I'd prefer not to find out the 
hard way.

Ron N

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