Small project

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Alan Carruth
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Joined: Sun Jan 15, 2012 1:11 pm

Re: Small project

Post by Alan Carruth »

Why not put a string on over the top, with a jury rigged peg instead of the neck? I think it's the balance of forces that comes into play here; at some break angle they balance out, so it's not the absolute force that matters. Use a dial gauge to read how far the bridge is pushed up or down with different bridge heights/break angles.

I'll note that you should do this with the box closed, so that would preclude using the test to figure out whether you can trim braces or not, unless you want to try Joe Curtin's trick. He noted that CA is designed to stick to protein. He sizes the linings and plate edges of violins he's experimenting with using weak hide glue, and lets it dry. Then he can put the plates on with CA for quick tests, since he's good at getting hide glue joints apart. When he's done the testing he wants to do he just has to remove the plates a last time, wash off the CA, and glue everything up with hide in the usual manner. The CA saves a lot of time in this sort of testing.

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

Out of curiosity I continued with the test setup yesterday, Alan.

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Between the tail and neck block is a sturdy stick and longitudinally of the top there is a bar clamp. The body itself is also clamped to a sandpaper surface and is therefore difficult to move.
Several measurements were made with each time putting more tension on the bar clamp. Difficult to estimate how many kg the bar clamp gives, but no matter how I increased that pressure the deflection of the top remained 1 mm..

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

And then.. I suddenly saw that old scale!

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Getting 80 Kg is very easy, I definitely went higher in the test.

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Even reaching the maximum (125 kg) is effortless..

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

Measure neck angle:

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For certain reasons, I want a detachable neck with this one.
First off, I don't like truss rod covers, so the truss rod will be accessible through the heel of the neck.
Second, finishing a guitar is much easier when the neck and body are separate.
So, before the box closes, something has to be prepared..

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And because of the f holes, the access to the bolt is visible in the heel

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Peter Wilcox
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Joined: Sun Jan 08, 2012 1:31 am
Location: Northeastern California

Re: Small project

Post by Peter Wilcox »

I must be misunderstanding something, but it looks like access to the bolt (to remove and install the neck) will be on the outside of the heel.
Maybe I can't fix it, but I can fix it so no one can fix it

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

You understand very well, Peter, the access to the (Allen head) bolt is on the outside of the heel..

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

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Box closed

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And sides scraped flat, so the binding channels can be made

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On previous projects I did it this way

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But after applying a 'handle' this time I tried it like this:

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It will stay that way; it works better and easier

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Although I thought afterwards that it would work even better with this adjustment..

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Peter Wilcox
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Location: Northeastern California

Re: Small project

Post by Peter Wilcox »

Keep 'em coming, Kurt. I'm enjoying them, and getting ideas for when I get back to building my archtop bass - maintenance issues have gotten in the way for now.
Maybe I can't fix it, but I can fix it so no one can fix it

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

Looking forward to following your archtop bass project, Peter!

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In the meantime, the binding has been installed

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And a fretboard extension support has been made

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Barry Daniels
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Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Small project

Post by Barry Daniels »

You are making good progress. What is the purpose of the tenon through the top? Not much to support it there.
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Kurt Temreto
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Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

The end of the fretboard is a few millimeters above the top and therefore needs to be supported, Barry, it seems more logical to me to do this through an extension at the neck than through a support on the top.

Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

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In the meantime found some time to put the truss rod in place..

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Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

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Preparing the fretboard

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And because I want the fretboard inlay dots in the same color as the binding, I made them from a leftover binding

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Align fretboard

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and hold in place using a few small pieces of wood and hot glue

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Gluing the fretboard in place is very easy that way.

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Barry Daniels
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Location: The Woodlands, Texas

Re: Small project

Post by Barry Daniels »

You are gluing on the fretboard with a hot glue gun?
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Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

Gluing on the fretboard with a hot glue gun is probably not such a good idea, Barry, it's about the 'markers' that are glued with hot glue after the fretboard is aligned in the correct position

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This way the fretboard can slide less easily during final gluing..

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Barry Daniels
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Location: The Woodlands, Texas

Re: Small project

Post by Barry Daniels »

Wow, you had me worried there for a moment. I like to use positioning blocks also.
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Kurt Temreto
Posts: 27
Joined: Thu Oct 28, 2021 2:28 am

Re: Small project

Post by Kurt Temreto »

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Took the time last weekend to shape the neck

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