Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Fri Nov 29, 2024 7:10 am


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 12 posts ] 
Author Message
 Post subject: Drop(ped) Top
PostPosted: Fri Jun 19, 2020 8:17 pm 
Offline
Mahogany
Mahogany
User avatar

Joined: Sat Nov 19, 2011 2:20 pm
Posts: 50
First name: Mark
Last Name: Chinworth
City: Kirkwood
State: MO
Zip/Postal Code: 63122
Country: United States
Focus: Build
Status: Amateur
This is what happens when you drop your nearly finished guitar body onto a concrete workshop floor.
After two months of grumbling, and laying down padded carpeting, I have a basic plan: Replace the top.
Any other recommendations? Should I complete the new top before removing the old or vice-versa? I plan to harvest the rosette and reuse it for the new top. I doubt any bracing or the bridge plate can be saved.

Procedure outline:
1. Route off the binding and purfling with a bearing bit just a tad less depth than the top thickness.
This will leave behind the side purfling and some of the binding, but that will be taken off later.
2. Continue the route inward until I'm past the width of the kerfed lining.
3. Sharp razor to slice the tiny remaining fibers between the top and lining.
4. Put the body back into the mold and sand with radius dish to fresh lining wood.
5. Make new top.
6. Glue top to sides.
7. Flush route the top to the sides.
8. Route off remainder of old binding and side purfling.
9. Glue in new binding and purfling.
10. Clean up and sanding.

Anything else?


You do not have the required permissions to view the files attached to this post.


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Fri Jun 19, 2020 10:41 pm 
Offline
Old Growth Brazilian Rosewood
Old Growth Brazilian Rosewood
User avatar

Joined: Fri Nov 02, 2007 9:49 am
Posts: 13388
Location: Ann Arbor, Michigan
First name: Hesh
Last Name: Breakstone
City: Ann Arbor
State: Michigan
Country: United States
Status: Professional
Sorry this happened to you Mark but it sounds like you have a great plan to make it right. You will also not be sorry that you replaced the top. Your workmanship and planning is excellent and it's my guess that you will have a guitar to be proud of.

My only suggestion is while the top is off you will have a great opportunity to be absolutely sure that none of the other braces are loose. When a guitar gets dropped loose braces are pretty common.


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Fri Jun 19, 2020 10:55 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6256
Location: Virginia
Oh man! Sorry to hear. Great looking binding too. This too shall pass. Sounds liek you have your head on straight.


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Fri Jun 19, 2020 10:59 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Wed Feb 20, 2008 7:15 pm
Posts: 7380
First name: Ed
Last Name: Bond
City: Vancouver
Country: Canada
Focus: Build
Status: Professional
This might help...

http://grevenguitars.com/retopping-demo.html


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Sat Jun 20, 2020 7:00 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Sun Mar 30, 2008 8:20 am
Posts: 5968
Looks like a nice top. Any chance you could make a smaller instrument with the undamaged part?
If you have some matching wood you could patch in the top or do a "cranked bevel" a la Mike Doolin.
http://acousticguitarconstructionforum. ... php?t=2988


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Sat Jun 20, 2020 12:50 pm 
Offline
Contributing Member
Contributing Member
User avatar

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
Been there, done that. Mine was on a refinish job. It bounced around some and managed to destroy the headstock, sides, and the back. I didn't take a picture, figured it would be better to forget....

_________________
Joe Beaver
Maker of Sawdust


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Sat Jun 20, 2020 1:02 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6256
Location: Virginia
meddlingfool wrote:


That's the method I use, works great.

Clay S. wrote:
Looks like a nice top. Any chance you could make a smaller instrument with the undamaged part?
If you have some matching wood you could patch in the top or do a "cranked bevel" a la Mike Doolin.
http://acousticguitarconstructionforum. ... php?t=2988


Every time I have had to do this I have made a smaller guitar with the top. An 000 becomes an 00.


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Mon Jun 22, 2020 5:50 am 
Offline
Koa
Koa

Joined: Sun Apr 25, 2010 4:46 pm
Posts: 527
First name: Mark
Last Name: McLean
City: Sydney
State: New South Wales
Zip/Postal Code: 2145
Country: Australia
Focus: Build
Status: Amateur
Quote:
Procedure outline:
1. Route off the binding and purfling with a bearing bit just a tad less depth than the top thickness.
This will leave behind the side purfling and some of the binding, but that will be taken off later.
2. Continue the route inward until I'm past the width of the kerfed lining.
3. Sharp razor to slice the tiny remaining fibers between the top and lining.
4. Put the body back into the mold and sand with radius dish to fresh lining wood.
5. Make new top.
6. Glue top to sides.
7. Flush route the top to the sides.
8. Route off remainder of old binding and side purfling.
9. Glue in new binding and purfling.
10. Clean up and sanding.

Anything else?


11. Be careful not to drop it again


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Mon Jun 22, 2020 8:50 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
I'm sorry that happened Mark. It was looking really good too. I'm sure your recovery will be well executed.

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Mon Jun 22, 2020 9:57 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu May 12, 2005 5:46 am
Posts: 2969
Location: United States
I have used the procedure you describe a couple of times and have been able to reuse the rosette as well. Works well. I have not tried John Grevens technique but it would be nice not to have to replace the binding. I'm pretty sure I'm not as skilled as John :)

_________________
Jim Watts
http://jameswattsguitars.com


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Mon Jun 22, 2020 12:38 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6256
Location: Virginia
Jim Watts wrote:
I have used the procedure you describe a couple of times and have been able to reuse the rosette as well. Works well. I have not tried John Grevens technique but it would be nice not to have to replace the binding. I'm pretty sure I'm not as skilled as John :)


It truly is surprisingly easy to do.


Top
 Profile  
 
 Post subject: Re: Drop(ped) Top
PostPosted: Mon Jun 22, 2020 12:43 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu May 12, 2005 5:46 am
Posts: 2969
Location: United States
Alright I'll have to give it a try, I have a candidate for it now.

_________________
Jim Watts
http://jameswattsguitars.com


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 70 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com