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 Post subject: My jumbo build
PostPosted: Fri Oct 04, 2013 5:21 am 
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Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
Posts: 3820
Location: Taiwan
First name: Tai
Last Name: Fu
City: Taipei
Country: Taiwan
Focus: Repair
Status: Semi-pro
I am almost finished with the build... the binding took a lot of time because I wanted to get them right, then right at the last minute I get a little carried away with a random orbital sander and put some really deep gouges on the edge and sanded through the thin herringbone purfling!!!


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_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 5:27 am 
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Brazilian Rosewood
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Location: Taiwan
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This is a picture of the gouge and sand through... I wish I hadn't done this because that was a whole day of work. I should have paid more attention to what the sander was doing in the back...


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_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 7:17 am 
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Brazilian Rosewood
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Location: Taiwan
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Country: Taiwan
Focus: Repair
Status: Semi-pro
I already did that, but I sanded through another section. I think what I'll do is just drill a series of holes and inlay some black into the area where the black should go... that should hide the defect well enough to where people won't notice it unless they looked at it with a microscope.

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 7:46 am 
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Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
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Location: Taiwan
First name: Tai
Last Name: Fu
City: Taipei
Country: Taiwan
Focus: Repair
Status: Semi-pro
Yea, that was just sort of what I was thinking... it's basically building bits and pieces of herringbone to hide it a bit..

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 8:41 am 
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Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
Posts: 3820
Location: Taiwan
First name: Tai
Last Name: Fu
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Country: Taiwan
Focus: Repair
Status: Semi-pro
Ok, I think what I'll do is just route the purfling off with a router and binding jig... I don't want to redo the binding, it's bad enough having to force that binding in place already. I'll just route off the section where the gouge is and hopefully blend everything in.

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 10:06 am 
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Koa
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Joined: Wed Jan 14, 2009 3:14 am
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Location: Shefford, Québec
First name: Tim
Last Name: Mullin
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State: QC
Zip/Postal Code: J2M 1R5
Country: Canada
Focus: Build
Status: Professional
At this stage of the game, I can't understand why you don't just rout off everything and start over. It's going to take much longer to fiddle with patches and I can't imagine you'll be happy with the end result. Look at it this way: you get binding/purfling experience of two guitars. If you're fearing the task of getting a good fit with your binding, don't put off the practice to the next guitar.


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These users thanked the author Tim Mullin for the post: jackwilliams (Fri Oct 04, 2013 11:20 am)
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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 10:18 am 
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Brazilian Rosewood
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Location: Taiwan
First name: Tai
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Focus: Repair
Status: Semi-pro
Fixed it, it wasn't hard, I just routed a slot in and patched it. I had to patch the purfling when initially installing because I bought the wrong kind, and it was too short to cover half the body.

The black stuff is just filling some voids in with black CA.


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_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 11:12 am 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Aug 19, 2005 4:02 am
Posts: 3272
Location: The Woodlands, Texas
First name: Barry
Last Name: Daniels
Looks bad, Tai. You didn't match up the purfling pattern well. This will stick out like a sore thumb. As advised above, rout off binding and purfling and rebind until you get it right.



These users thanked the author Barry Daniels for the post: jackwilliams (Fri Oct 04, 2013 11:19 am)
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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 04, 2013 12:37 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
Posts: 3820
Location: Taiwan
First name: Tai
Last Name: Fu
City: Taipei
Country: Taiwan
Focus: Repair
Status: Semi-pro
You didn't read the whole post. There was a couple of pinholes from pieces crumbling out of the purfling that I had to fill, once sanded away the pattern matches up and you will need a loupe to see where they were joined. It's not perfect for sure but looks a lot better than before. Now I just need to scrape the top level because the sander has left several gouges on the top... learned my lesson there.

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Sat Oct 05, 2013 1:33 pm 
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Contributing Member
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Joined: Thu Feb 09, 2006 2:35 pm
Posts: 2951
Location: United States
First name: Joe
Last Name: Beaver
City: Lake Forest
State: California
Focus: Build
A random orbit sander can a real time saver or your worst enemy. I use it sparingly these days having discovered it in the latter category once to often.

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Joe Beaver
Maker of Sawdust


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 Post subject: Re: My jumbo build
PostPosted: Sat Oct 05, 2013 4:05 pm 
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Contributing Member
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Joined: Thu Apr 19, 2012 11:10 am
Posts: 522
First name: Martin
Last Name: Kelly
City: Tampa
State: FL
Zip/Postal Code: 33634
Country: USA
Focus: Build
Status: Amateur
Good save Tai. Agree with Joe, I quit using my random obital sander around my bindings once I sanded through a couple; now I use either the scraper or hand sand and not too agressively.


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 11, 2013 11:47 am 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
Posts: 3820
Location: Taiwan
First name: Tai
Last Name: Fu
City: Taipei
Country: Taiwan
Focus: Repair
Status: Semi-pro
Here's an update: I have fitted the neck (it took several days... wish there's something I can do to make this job go quicker) and glued it in. I've dealt with the gap under the fingerboard by carefully fitting a wedge under the fingerboard, and it made things look very good (nice thing about ebony is that the glue line is invisible).

I have also started bending the bubinga (?) side I just bought and sawn from the lumberyard. The wood is a LOT harder to bend than I realize. I made it too thick and it wanted to break in many places, but the damage is limited to the edge rather than the center so binding them will take care of it. I took the second half down to .085" and it made bending a LOT easier. I've grossly underestimated the wood... just because it's not stiff doesn't mean it's easy to bend!


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_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 11, 2013 1:05 pm 
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Koa
Koa

Joined: Mon Jun 30, 2008 1:06 am
Posts: 508
First name: Greg
Last Name: B
City: Los Angeles
State: California
Looking good.

As a recent Jumbo builder, I'm curious which bracing scheme you used. There were several different ones, at various points. Got a bracing shot?


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 Post subject: Re: My jumbo build
PostPosted: Fri Oct 11, 2013 1:16 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
Posts: 3820
Location: Taiwan
First name: Tai
Last Name: Fu
City: Taipei
Country: Taiwan
Focus: Repair
Status: Semi-pro
I don't know, I copied it off of a gibson SJ-300, it looks like a standard X brace. I am not sure how else one can brace it...

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


Top
 Profile  
 
 Post subject: Re: My jumbo build
PostPosted: Fri Oct 11, 2013 1:53 pm 
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Koa
Koa

Joined: Mon Jun 30, 2008 1:06 am
Posts: 508
First name: Greg
Last Name: B
City: Los Angeles
State: California
They originally had a double X bracing system, but not the 70s type. There was a shallow 128º X (IIRC) instead of a UTB, a main X at the same angle, and ladder type tone bars.

On my jumbo, I was concerned that scheme would sound too much like ladder bracing, so I used a standard X and tone bars below the soundhole.


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 Post subject: Re: My jumbo build
PostPosted: Mon Oct 14, 2013 10:35 am 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Wed Sep 24, 2008 8:55 pm
Posts: 3820
Location: Taiwan
First name: Tai
Last Name: Fu
City: Taipei
Country: Taiwan
Focus: Repair
Status: Semi-pro
Here is some more progress. I have inlaid the fingerboard and sanded the radius in. I decided to inlay it with some padauk scrap because I want this guitar to be lacey act compliant, so I can't use the usual abalone shell... it's a shame because shell looks 1000 times better than any wood. I have also sealed the body with an initial coat of shellac. I am doing this in steps so that I don't contaminate the white wood with darker woods when finish sanding them.


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_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com


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