Search found 52 matches

by Richardl
Wed Jul 18, 2018 8:05 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Actually, I've answerd my own question and notched them both out. It's quite a challenge to get everything perfectly aligned, perfectly mating with the headblock and so-on. But I think I have achieved a reasonable fit so I'm going to bed happy. Hope it fits on as well once the back is glued on! Chee...
by Richardl
Wed Jul 18, 2018 8:02 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Just about to notch the side linings to take the upper transverse brace. I can't see it covered in the book, but on the J45, it appears that the upper cross brace is also notched into the linings, is that correct? They end up quite close and of a similar depth to the transverse brace notch so do you...
by Richardl
Thu Jul 05, 2018 3:40 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Kiwigeo, Yes, thanks. I wasn't intending to make a compensated nut on this one but intend to mount it on the thinned end of the fretboard as shown in the book. I'm not exactly sure how to do a compensated nut - need to look into that but thought at this early stage in my guitar building, just gettin...
by Richardl
Thu Jul 05, 2018 5:08 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Thanks Col, I'll bear the Stewmac calculator in mind. I have a pre-cut fretboard for this build so can use that as a guide for nut position etc. I just wondered if I had missed something as the book gives specifics for the 12 fret options but not the 14. Cheers
Richard
by Richardl
Sun Jul 01, 2018 5:54 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Hi again Trevor Before launching into cutting the neck , I was looking at fig 5-2 which gives the neck layout for a 12 fret build. For the J45, it'll need to be longer won't it. The calculation for the head side of the nut to body is explained but I can't see the basic dimensions required for a J45 ...
by Richardl
Mon Jun 25, 2018 6:01 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Thanks Guys

that all makes sense. I'll glue it in and all will be well - my sides are a few mm deeper than needed anyway. Getting more maple for the linings would be a pain so I'm glad I can use what I have.

Again, many thanks for your patience!

Cheers
Richard
by Richardl
Mon Jun 25, 2018 3:18 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Great, thanks for the correction. So, before gluing in the headblock, I could sand an approximate front to back angle, or I could just plane it when assembled in the mold. I guess I was wondering if there was a specific front to back angle on the top plate that we should be aiming for to be assured ...
by Richardl
Mon Jun 25, 2018 7:24 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bolt on bolt off neck - order of operations
Replies: 18
Views: 780

Re: Bolt on bolt off neck - order of operations

Hi Trevor - this will also help me a lot when i get to that stage. I'm in the process of gluing the headblock, which I have pre-morticed. At the moment, the headblock is too long. However, I assume it will need to be 2 or 3 mm longer on the back to accomodate the curve of the back when sanding if we...
by Richardl
Mon Jun 18, 2018 11:10 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Further J45 questions
Replies: 3
Views: 248

Re: Further J45 questions

Many thanks Trevor and Col. That really helps. I'll remember about the bolt length or put a washer in to account for the slight difference. Yes, I got the order of making wrong - I thought I could borrow a bending iron but ended up buying one that took a while to arrive (but worth the wait). Hopeful...
by Richardl
Sun Jun 17, 2018 5:18 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Further J45 questions
Replies: 3
Views: 248

Further J45 questions

Hi again I'm in the process of making the headblock and have been following the book, very slowly and to the letter - as much as I'm able. I keep running into questions, and being new at the game, I never really know which aspects are absolutely critical and which have some flexibility in their inte...
by Richardl
Mon Apr 16, 2018 6:31 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Starting out on J45
Replies: 10
Views: 1059

Re: Starting out on J45

Hi Trevor Thanks for your reply, that helps -I'll just have to take over a room in the house for a bit! I'm somewhat out of sequence in this build unfortunately as I still haven't sorted out a bending iron. I'll do it differently next time. The back and front will have to just sit around for a bit u...
by Richardl
Sun Apr 15, 2018 5:47 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Starting out on J45
Replies: 10
Views: 1059

Re: Starting out on J45 ...RH question

Hi - I've recently completed the soundboard, braced carefully at 45% RH (or a little below). It has been sitting at about 55% RH in the house for a day or two and has developed quite a convex curve (from the outside as shown in the book). I'm assuming that the rest of the glue-up will also need to b...
by Richardl
Thu Mar 29, 2018 8:21 am
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

For the record, I contacted Titebond for info on the loss of strength likely when re-gluing. They very promptly replied with the following: "Testing being performed here shows when regluing joints, you could lose up to 15% of the strength, which is still very strong. When you have a glue in the 3500...
by Richardl
Wed Mar 28, 2018 7:01 pm
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Well, there seems to be a consensus to re-do it so that is what I have done. Actually, I've manged to cut and plane it with the loss of about 1 mm in width so the rosette looks fairly intentional and I can't tell it isn't a perfect circle by eye. I used a lot of glue and ensured plenty of squeeze-ou...
by Richardl
Tue Mar 27, 2018 3:47 pm
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Got home and tried an experiment. Cut off the top and bottom waste of the soundboard and bent the strips. The wood broke next to the join, not the glue line. The glue line is almost invisible but seems quite sound and a great deal stronger than the previous one that failed. Ive pushed and pummelled ...
by Richardl
Tue Mar 27, 2018 12:35 pm
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Thanks for that. Hadn't thought about using a scalpel rather than a saw! Should only loose a mm or so that way.

Cheers
Richard
by Richardl
Tue Mar 27, 2018 9:44 am
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Right, here is a plan. I can cut the board, plane and glue not worrying about the size and shape of the soundhole. Re-router out the centre hole to 104 mm and router out a 15 mm trench for this rosette so the rosette comes to the edge of the soundhole... http://www.lmii.com/products/mostly-wood/rose...
by Richardl
Tue Mar 27, 2018 7:57 am
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Unfortunately, it a patterned rosette, not just plain rings, so if its cut and re-joined it will look terrible. If the soundboard is cut, planed and re-glued, I'll end up with an elliptical hole and rosette anyway. I can router the hole circular OK, but will have to router out the rosette and find s...
by Richardl
Tue Mar 27, 2018 5:27 am
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Seems a shame to scrap it as its not easy to get the wood here in NZ. I'm not sure how to re-do the sound hole /rosette on the existing board as the dimensions will have changed after sawing it. Do you think the glue won't take to a previously glued surface? It actually looks fine now. When I bandsa...
by Richardl
Mon Mar 26, 2018 3:52 pm
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Right, well I bent the board a bit and heard a crack so the whole glue line failed with little effort and I have re-glued it from the back, forcing glue in the best I can without completely separating the halves (and not wiping the glue off with a damp cloth) ... and hopefully without wrecking the i...
by Richardl
Mon Mar 26, 2018 10:30 am
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

Is a soundhole patch just reinforcement under the rosette?

Cheers
Richard
by Richardl
Mon Mar 26, 2018 6:21 am
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

OK, thanks, I'll do that. I re-glued the cut out sound hole to test it and it has glued so well the wood failed not the glue line, so the titebond is fine. I didn't get much squeeze out so I must have just starved the joint. I was shocked how easily it broke though.

Cheers
Richard
by Richardl
Sun Mar 25, 2018 7:49 pm
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Re: Soundboard gluing failure

That was quick! Thanks. I also just had a thought that I could rout a 2 mm deep x 10 mm wide channel in the back centre of the soundboard - maybe just in areas there is less bracking and inlay a strip of spruce (either long or cross grain). Maybe that is overkill if the diamonds work just as well. B...
by Richardl
Sun Mar 25, 2018 7:24 pm
Forum: Instrument Builders Forum
Topic: Soundboard gluing failure
Replies: 19
Views: 1437

Soundboard gluing failure

Hi All I've just inlayed my rosette and cut out a soundhole, picked up the board and the upper bout glueline cracked :cry: I've re-glued that and guess that is braced a good deal with the neck block etc so maybe it isnt a huge issue (and the glue line is covered) but I'm now worried that the rest of...
by Richardl
Sun Mar 04, 2018 7:46 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Starting out on J45
Replies: 10
Views: 1059

Re: Starting out on J45

I guess I was just wondering whether the number of growth rings per cm had any influence on the likely failure of a brace and how I should choose the bit to use for the most critical braces as the number of growth rings can vary considerably. It seems maybe there isnt a clear relationship. Bought th...