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 Post subject: String Compensation Jig
PostPosted: Wed May 19, 2010 10:14 pm 
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Cocobolo
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Joined: Mon May 26, 2008 2:31 pm
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Location: Conway, Arkansas
Well I just ripped off a good idea from David Hurd. Being fairly new to building, I still feel nervous about getting the bridge/saddle in the right place. I know you more experienced builders have it down, but i think I now have a pretty good way to experiment with different strings on any scale length. Some of the modifications I made on Mr. Hurd's compensation jig were:

1. Using a 1/4" removable fretboard (double sided sticky tape) so different scale lengths can be tried. This also allows you to place the first 3 frets or so, which lets you work on nut slotting.

2. I used a nut instead of a zero fret. It is just wedged between a small piece of wood on the headstock (with a 15 degree vertical angle) and the sticky taped fretboard.

3. The retention block of wood at the tail end of the jig has a piece of aluminum that fits into a slot on the board that keeps it dead still.

4. I used two carriage bolts with compression springs to help keep the bridge platform from skewing from side to side.

It was a major project for my little mind, but I'm really tickled with what I've been able to do with it. Anyway, here are a few pics. Thanks for looking.


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Last edited by Bill Higgs on Wed May 19, 2010 10:21 pm, edited 1 time in total.

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PostPosted: Wed May 19, 2010 10:16 pm 
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PostPosted: Wed May 19, 2010 10:17 pm 
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PostPosted: Wed May 19, 2010 10:29 pm 
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Joined: Thu Jul 16, 2009 2:19 pm
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First name: Ed
Last Name: Haney
City: Sugar Land (Houston)
State: Texas
Zip/Postal Code: 77479
Focus: Build
You also mentioned the first 3 frets. Are you tryning to use the stobe to place the first 3 frets instead by calulation? Are then locating the remaining frets by calculation (template)? Or are you just locating the saddle by using the strobe?

Ed


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PostPosted: Wed May 19, 2010 10:33 pm 
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Ed, I cut the fret slots with a template on the table saw. And yes, your right, I am using the strobe to set the saddle/bridge location by comparing the fretted and harmonic note at the 12th fret.

Bill

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PostPosted: Thu May 20, 2010 11:35 am 
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Oh yea, I forgot to mention that I use an actual bridge and saddle instead of a piece of metal.
This allows me to adjust the saddle.

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