what is he doing?

Intonation, Compensation, Frustration
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btberlin
Posts: 61
Joined: Sun Dec 30, 2012 11:53 pm

what is he doing?

Post by btberlin »

I have been looking at this link, which has a photo of a compass being used to trace a curve on a saddle. Bt, from the picture and text i cannot figure out what the hand is doing! Can someone help?

[url]Link: http://harvestmoonguitars.com/kennethmi ... addle.html[/url]
Cbstark46143
Posts: 43
Joined: Sat Aug 30, 2014 5:49 pm

Re: what is he doing?

Post by Cbstark46143 »

I used tools like this as a trim carpenter. With the compass held so that the point and the pencil are kept “vertical”, the hand moves left to right to copy the curve of the bridge onto the saddle. Apparently the radius of the bridge already matches the radius of the fretboard.
ruby@magpage.com
Posts: 1564
Joined: Thu May 24, 2012 8:03 am
Location: Chestertown Maryland

Re: what is he doing?

Post by ruby@magpage.com »

Interesting - he is copying the curve of the top of the bridge, NOT the curve of the fretboard. My daughter has her own repair shop and she has a set of fretboard curve measuring gauges:

https://www.stewmac.com/Luthier_Tools/T ... auges.html

She measures the radius if the fretboard, then picks the next tighter curve and traces it on the saddle then trims it on the belt sander
Ed M
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