7-string guitar: All plywood and using simple handtools

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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Thu Sep 06, 2012 1:41 pm

Barry and RD thank you for your feedback,

Barry,
I've checked it, and I think it will be (just) fine. Because of the fanned frets the position of the hand is different than with parallel frets, but it is on the "next build"-list.
I'm a bit more worried about the nut because I have to "reach" over it to play the first notes. I have to make sure that there are no sharp ends.

Hans
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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Thu Sep 06, 2012 1:58 pm

I've glued in the frets with epoxy and trimmed the frets.
I've applied the epoxy in the slots with a toothpick, hammered in the frets and wiped the excess of glue with a cloth, finally I used a long piece of plywood and clamps to hold the frets in place while drying.

A little while back I dyed a piece of pine plywood and finished it with Danish oil.
I'm thinking of giving the body only a Danish oil finish and use some black dye / Danish oil for the neck.

Next up:
Making the neck plate and test fitting the neck.
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28 - glued in frets.JPG
29 - wood dye and danish oil.JPG
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Re: 7-string guitar: All plywood and using simple handtools

Postby Mark Swanson » Thu Sep 06, 2012 2:11 pm

Hans, I agree with Barry. You need more room in the peghead behind the nut. In the photo shown, you have to reach back with your first finger and the lower part of the finger does not hit the highest two strings- in that photo, those strings would be muted.
It's hard to tell without strings, and you should just go ahead and finish the guitar but be aware of this and next time you'll be able to deal with it. Many un-forseen problems pop up when designing a new instrument, it's a normal part of the process.
    Mark Swanson, guitarist, MIMForum Staff
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Re: Glueing up the body

Postby David Schwab » Sun Sep 09, 2012 4:57 pm

Hans Bezemer wrote:Any suggestings?


Yes, you glue up your body blank before cutting out the shape.
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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Mon Sep 10, 2012 3:22 pm

David and Mark,
Thank you for your feedback!
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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Mon Sep 10, 2012 3:36 pm

I've made the neckplate and coverplate out of a 4 mm aluminium plate.
I've drilled the holes for the jack input with a 20 mm forester drill. The plywood splintered a little bit, so I have to glue some pieces back in place.

Hans
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31 - Neckplate.JPG
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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Sun Sep 16, 2012 2:01 pm

Made little progress, due to my work and family.

I've put masking tape on the frets and started sanding the neck and body.

I need some advice on that.
I'm planning to use (wood dye and) danish oil as a finish and want to sand up to 800 grit.
Is this all right? To much? To little? Is dry sanding ok or do I have to wet the surface?
Thanks in advance.

Hans
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Re: 7-string guitar: All plywood and using simple handtools

Postby Markku Nyytäjä » Sun Sep 16, 2012 2:42 pm

If it's plain wood, dry sand it. Otherwise the water will soak the the wood fibres. Of course you can wet sand with oil, but I have never tried that. Wet sanding with water is better if you have lacquered the surface. 800 grit is pretty fine for plain wood. It will polish the surface and you will see, if there are dents or uneven spots left.
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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Wed Sep 26, 2012 11:10 am

I've applied the wood dye and 2 layers of Danish Oil.
I had some trouble getting the right colour. I wanted a brown / red colour but after drying it turned to pink (which didn't happen on the scrap piece I used). But after adding some more brown and black dye the problem was solved.
Another thing is that the knots in the pine don't take up the wood dye as good as the rest of the wood.

Hans
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34 - Body with wood dye and danish oil.JPG
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Re: 7-string guitar: All plywood and using simple handtools

Postby Hans Bezemer » Wed Sep 26, 2012 11:13 am

I've also put 2 layers of oil on the neck and installed the tuners and the nut.

Hans
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36 - Neck with oil.JPG
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37 - Neck with oil.JPG
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Finished!

Postby Hans Bezemer » Wed Oct 03, 2012 5:02 am

I've finished the guitar!

I've applied an extra coat of danish oil on the body to get a more shiny result.

I will evaluate the process / materials in the next post.

Hans
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Looking back

Postby Hans Bezemer » Wed Oct 03, 2012 5:29 am

When looking back on the process I've have the following conclusions:

- In general I'm satisfied with working with plywood:
* The neck is holding up fine and the birch plywood is easy to work with and wood dye and oil are easily applied, so I will use this for a future build;
* The pine is also easy to work with, but it has a tendency to splinter. Furthermore there are more flaws in the plywood (holes and knots) and the wood dye doesn't stain the knots, but the look of the top is nice;
- Taking it easy is the way to go: I've noticed that my biggest "enemy" was my impatience, even more then my lack of building experience / technical skills.
- For a future build I have 3 thinks I will change in the design:
* Giving more room for the peghead (as noticed by Barry earlier)
* Making some chambers in the body or use thinner plywood to reduces some weight
* Let the neck meet the body at the 15th fret instead of the 19th fret (to get a stronger connection)

I want to thank everybody who gave feedback!

Hans
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