Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Wed Dec 11, 2024 5:58 pm


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 38 posts ]  Go to page Previous  1, 2
Author Message
PostPosted: Tue Dec 19, 2017 8:31 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3613
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur
That's a great jig, Jeff!

_________________
Insta - https://www.instagram.com/cbcguitars/
Facebook - https://www.facebook.com/cbcguitars


Top
 Profile  
 
PostPosted: Tue Dec 19, 2017 10:07 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Dec 14, 2007 3:21 pm
Posts: 3395
Location: Alexandria MN
Cool idea Jeff!

_________________
It's not what you don't know that hurts you, it's what you do know that's wrong.


Top
 Profile  
 
PostPosted: Tue Dec 19, 2017 11:29 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5505
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
jeffhigh wrote:
I use a 12" disc sander too.
It's a long lower and upper board, drilled at 1" centres for a pivot
I just fix the block on with a screw since I always use a cross grain veneer to the inner face.
once I have worked out the best radius by trial (working from numerially large down) I write the number on the mould for that guitar

Used to use a similar set-up for my 6" belt sander, but find it quicker now to block plane and then touch up with abrasive in my molds which are full height+ at the top and tail.

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


Top
 Profile  
 
PostPosted: Tue Dec 19, 2017 2:24 pm 
Offline
Contributing Member
Contributing Member

Joined: Tue Jan 29, 2008 11:14 am
Posts: 819
First name: Tim
Last Name: Lynch
City: Santa Cruz
Zip/Postal Code: 95060
Country: United States
Focus: Build
Status: Amateur
Santa Cruz Guitar Co. called me one day and asked me to come over and look at the fixture they had made almost identical to yours Brad. They were having a slight problem with it which they showed me when I arrived. After placing the blank in the fixture and informing me to stand back J.K. ran the part through the router table. The bit ripped the part out of the fixture and sent it into the wall across the room some 30' away faster than I could follow it with my eyes. Scary? Just a bit. I would make sure that every bit I put in the router spun perfectly true, at the very least and be sure to stand out of the line of fire. Me, I'll stick with the sander. Not worth damaging any body parts to save a minute or 2.



These users thanked the author Tim L for the post: bcombs510 (Tue Dec 19, 2017 3:12 pm)
Top
 Profile  
 
PostPosted: Tue Dec 19, 2017 2:42 pm 
Online
Contributing Member
Contributing Member
User avatar

Joined: Mon Apr 16, 2012 12:47 pm
Posts: 2524
First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington
Tim L wrote:
The bit ripped the part out of the fixture and sent it into the wall across the room some 30' away faster than I could follow it with my eyes..


This is exactly what I would be worried about and whatever was in the line of fire.

_________________
Once in a while you get shown the light in the strangest of places if you look at it right - Robert Hunter



These users thanked the author J De Rocher for the post: bcombs510 (Tue Dec 19, 2017 3:12 pm)
Top
 Profile  
 
PostPosted: Sat Dec 23, 2017 3:53 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3613
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur
I updated the jig to V2 taking into account much of the feedback from here. The new jig is a bit beefier, made of MDF. The front plate of the backstop can spin to allow the block to stay registered for the second pass. I did pick up a 12” disc sander to experiment with as well. The way the jig is designed I can use either the router, the sander, or a combination. I’m thinking that for tighter radius, where more material has to come off, start on the sander and finish up with the router. I’ll experiment a bit with both to see how it goes.

Another improvement is I put the neck and tail block radius on the same sled, just to cut down on materials. The backstop can come off and flip around to use either edge depending on the radius needed.

If this goes well I’ll make a second for Tenor Uke.

Some pics:
Image

Image

ImageImage

Brad





Sent from my iPhone using Tapatalk

_________________
Insta - https://www.instagram.com/cbcguitars/
Facebook - https://www.facebook.com/cbcguitars


Top
 Profile  
 
PostPosted: Sat Dec 23, 2017 4:56 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3613
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur
First test block off of the sander. That was no drama at all. You folks may have me convinced. ;)

Image


Sent from my iPhone using Tapatalk

_________________
Insta - https://www.instagram.com/cbcguitars/
Facebook - https://www.facebook.com/cbcguitars


Top
 Profile  
 
PostPosted: Sat Dec 23, 2017 6:08 pm 
Offline
Koa
Koa
User avatar

Joined: Tue Nov 11, 2008 9:13 pm
Posts: 834
Location: Durango CO
First name: Dave
Last Name: Farmer
City: Durango
State: CO
bliss bliss

I guess you'll have to get your Adrenalin fix some other way now.

Useful for making bone chikari posts too. (and other random round things with strange tapers and diameters).

Attachment:
IMG_1100.JPG

Attachment:
IMG_1103.JPG


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



These users thanked the author david farmer for the post: bcombs510 (Sat Dec 23, 2017 6:11 pm)
Top
 Profile  
 
PostPosted: Sat Dec 23, 2017 8:00 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Dec 14, 2007 3:21 pm
Posts: 3395
Location: Alexandria MN
Now yer cookin' Brad and you'll go through life with all ten.

_________________
It's not what you don't know that hurts you, it's what you do know that's wrong.



These users thanked the author Terence Kennedy for the post: bcombs510 (Sat Dec 23, 2017 10:20 pm)
Top
 Profile  
 
PostPosted: Sat Dec 23, 2017 8:53 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Wed Feb 20, 2008 7:15 pm
Posts: 7381
First name: Ed
Last Name: Bond
City: Vancouver
Country: Canada
Focus: Build
Status: Professional
I must say I'm relieved to see you go the sander route.



These users thanked the author meddlingfool for the post: bcombs510 (Sat Dec 23, 2017 10:20 pm)
Top
 Profile  
 
PostPosted: Sat Dec 23, 2017 10:25 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3613
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur
The main thing for me was repeatability of a quality result. I wasn’t getting that doing them by hand. The sander is very fast. I don’t see a reason for the router method at this time. I do appreciate all the advice and feedback!

Brad


Sent from my iPhone using Tapatalk

_________________
Insta - https://www.instagram.com/cbcguitars/
Facebook - https://www.facebook.com/cbcguitars


Top
 Profile  
 
PostPosted: Sun Dec 24, 2017 12:27 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Sun Mar 30, 2008 8:20 am
Posts: 5968
If you add side pieces to the jig that would support the work piece on both sides as well as clamping the top it might be less likely to fly across the room. Taking too big a bite or approaching the work in the wrong fashion can lead to disaster no matter what method you choose.
You should always use a tool and technique you are comfortable with - just not too comfortable.



These users thanked the author Clay S. for the post: bcombs510 (Sun Dec 24, 2017 7:11 am)
Top
 Profile  
 
PostPosted: Sun Dec 24, 2017 1:59 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu Oct 07, 2010 5:28 pm
Posts: 687
First name: Casey
Last Name: Cochran
City: Gainesville
State: GA
Zip/Postal Code: 30501
Country: USA
Focus: Build
I may do something more elegant in the future, but for now this works.
Image


Sent from my iPhone using Tapatalk

_________________
Good judgement comes from experience. Experience comes from poor judgement.



These users thanked the author Casey Cochran for the post: bcombs510 (Sun Dec 24, 2017 3:16 pm)
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 38 posts ]  Go to page Previous  1, 2

All times are UTC - 5 hours


Who is online

Users browsing this forum: Doug Moore, J De Rocher, Kbore, nashrb and 44 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