Search found 488 matches

by Dave M
Sat Nov 13, 2021 11:49 am
Forum: Instrument Builders Forum
Topic: Lathe based drum sander
Replies: 6
Views: 362

Re: Lathe based drum sander

Pat feel free. I don't think it is anything special, but if it helps others to improve their techniques then fine. Joel the drum is made from a bunch of layers of stuff that I had around in the shop. Mahogany or it's subsitutes. And of course with the lathe you have the tool to make the cylinder. It...
by Dave M
Sat Nov 13, 2021 3:24 am
Forum: Instrument Builders Forum
Topic: Lathe based drum sander
Replies: 6
Views: 362

Re: Lathe based drum sander

I do have a full size sanding thicknesser but still like to use this lathe based one for three jobs: thicknessing bone for nuts and saddles, scalloping the end of braces, and scalloping the ends of bridges. Couple of things. The drum should be reasonably large diameter to give plenty of abrasive sur...
by Dave M
Thu Oct 28, 2021 12:21 am
Forum: Instrument Builders Forum
Topic: Performax 16/32 Sander - belt tracking
Replies: 23
Views: 9547

Re: Performax 16/32 Sander - belt tracking

I'm one of the lucky ones and have had few problems with my Jet. However what looks like a bit of bent fencing wire that they call the TUF tool I have never been able to use, so changing the abrasive is always a bit of a struggle involving tweezers and a certain amount of swearing. Partcularly if I ...
by Dave M
Sun Oct 24, 2021 3:16 am
Forum: Instrument Builders Forum
Topic: Somewhere in here there is a guitar
Replies: 1
Views: 440

Re: Somewhere in here there is a guitar

That looks like fun!
by Dave M
Sun Oct 24, 2021 3:14 am
Forum: Jigs & Fixtures
Topic: Bending Strap
Replies: 1
Views: 398

Re: Bending Strap

Now that I like. Dave
by Dave M
Wed Oct 20, 2021 3:08 am
Forum: Instrument Builders Forum
Topic: Chisel set
Replies: 12
Views: 2610

Re: Chisel set

Just for info I bought a Narex chisel some time back and it was OK though a bit soft, but a second one is quite poor. Too soft to hold an edge for long.

What I do like to do is have several versions of the most used sizes so I don't have to break of and sharpen when in the middle of a task.
by Dave M
Mon Oct 11, 2021 2:45 am
Forum: Tutorials
Topic: Growing Dalbergia Latifolia, East Indian Rosewood
Replies: 4
Views: 880

Re: Growing Dalbergia Latifolia, East Indian Rosewood

Alex that's brilliant. I often wonder why more people don't plant rosewoods if they have the climate - it's not going to happen here in the UK! Why stop at a dozen? with 6 acres you could plant lots, and you clearly have worked out how to germinate the seeds. I'll leave a message to my grand nieces ...
by Dave M
Thu Oct 07, 2021 3:20 am
Forum: The Gallery
Topic: Cooba Guitar now completed
Replies: 10
Views: 1726

Re: Cooba Guitar now completed

So much detail - and that Acacia is quite magnificent.

I wonder what the neck body joint is? There doesn't seem to be room for the G&G bolt on, and you also have the strap button into the heel...?

Great stuff Dave
by Dave M
Thu Oct 07, 2021 3:10 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Alternative String Attachment to Top Plate
Replies: 11
Views: 2269

Re: Alternative String Attachment to Top Plate

Not quite the answer as I think you mean stiffness across the fully braced top...? However Trevor does demonstrate clearly that the cross grain stiffness of the top plate is very unimportant compared to the long grain stiffness. Can't tell you offhand where in the book this is but may have some time...
by Dave M
Sat Sep 18, 2021 2:32 am
Forum: Instrument Builders Forum
Topic: Building a kitset dreadnought
Replies: 15
Views: 2423

Re: Building a kitset dreadnought

That herringbone is seriously neat. Did you have to separate down the centreline to get it round the curves?

Dave
by Dave M
Sun Sep 12, 2021 2:23 am
Forum: Instrument Builders Forum
Topic: Some activity in my workshop at last
Replies: 7
Views: 2385

Re: Some activity in my workshop at last

Good on you Martin. That's not just a bit of activity!

I am myself decanting back into the shop now the gardening season is ending in this neck of the woods.

Cheers Dave
by Dave M
Sat Sep 04, 2021 3:07 am
Forum: Jigs & Fixtures
Topic: Scarf Joint
Replies: 0
Views: 2105

Scarf Joint

In the recent GAL Mark French talks of working in Charles Foxes workshop. In the article I noticed Charles' jig for cutting the scarf joint in his headstocks on the bandsaw. I decided I just had to have one. I have been doing them freehand but that means a fair bit of cleaning up with a plane afterw...
by Dave M
Mon Aug 30, 2021 1:28 am
Forum: Instrument Builders Forum
Topic: Building a kitset dreadnought
Replies: 15
Views: 2423

Re: Building a kitset dreadnought

Richard I am certainly following. I think that any build thread throws up a gem or two to help ones own build process.

Cheers Dave
by Dave M
Sat Aug 14, 2021 8:53 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Collecting 4DOF models
Replies: 26
Views: 4217

Re: Collecting 4DOF models

Yes Sitka. And CF under and over all braces and under the bridge plate. Braces also in Sitka. D
by Dave M
Sat Aug 14, 2021 2:04 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Collecting 4DOF models
Replies: 26
Views: 4217

Re: Collecting 4DOF models

Sorry thought I had said. It is steel string, based very closely on Trevor's design in the book for a mid sized SS. Assuming you have the book you can fairly easily work out the area since it is printed on a grid of squares. (and that takes me back a bit trying to measure the area uder curves on spe...
by Dave M
Fri Aug 13, 2021 8:32 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Soundport and Weight Effects on Frequencies
Replies: 6
Views: 1364

Re: Soundport and Weight Effects on Frequencies

Richard this may or may not be relevant... John I remember that you ended up using fairly tall falcate braces on your classicals. But I wonder what top thickness you ended up with? I have a falcate classical sitting in a corner because it turned out so dull and I am planning on thinning the top seri...
by Dave M
Fri Aug 13, 2021 8:14 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: The Boucher bar
Replies: 0
Views: 1230

The Boucher bar

There has been a lot of discussion about the effect of a substantial transverse brace sitting under the saddle position on the sound of a classical guitar on some other forums - not wishing to mention Delcamp! But I wonder what the effect on the modal performance of the top is...? I would imagine th...
by Dave M
Thu Aug 12, 2021 2:27 am
Forum: Anything Goes
Topic: Luthier lab
Replies: 8
Views: 3600

Re: Luthier lab

Mike appreciate your post and this completely allays my fears. I think it is great that you and your partner should put in the effort and make it available. As a student of Al Caruth we can be sure you know what you are doing. Having only recently acquired a phone that is big enough for me read I sh...
by Dave M
Tue Aug 10, 2021 2:08 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Collecting 4DOF models
Replies: 26
Views: 4217

Re: Collecting 4DOF models

It's a long story but i have been able to get an approximate weight for a falcate top. This has approx 5 mm extra round the edges and does not have to cutaway removed yet. It is a little less than 3 mm thick Came in at around 230 g.

Cheers Dave
by Dave M
Sat Aug 07, 2021 2:37 am
Forum: Instrument Builders Forum
Topic: More spindle moulder fun
Replies: 2
Views: 1262

Re: More spindle moulder fun

Fun indeed. That looks like a helical cutter rather than a sanding bobbin...? With a bearing at the base?

Having invested the time to make the jigs that certainly makes the tasks quick and perhaps more importantly repeatable.
by Dave M
Sat Aug 07, 2021 2:24 am
Forum: Instrument Builders Forum
Topic: Simple deflection test for soundboards
Replies: 2
Views: 1219

Re: Simple deflection test for soundboards

Deflection testing is a perfectly viable method for measuring the Youngs modulus of a soundboard - I would do it with a series of weights and a dial gauge on a half top board. It would need to be smooth and rectangular. The formula is widely available on the net. However the problem then is to use t...
by Dave M
Tue Aug 03, 2021 6:16 am
Forum: Instrument Builders Forum
Topic: Torrefied Tonewood
Replies: 24
Views: 3941

Re: Torrefied Tonewood

Love it. D
by Dave M
Mon Aug 02, 2021 1:09 am
Forum: Instrument Builders Forum
Topic: Torrefied Tonewood
Replies: 24
Views: 3941

Re: Torrefied Tonewood

I don't really think it is going to make a guitar sound more like a Torres!

D
by Dave M
Fri Jul 23, 2021 1:35 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Falcate brace template
Replies: 4
Views: 1157

Re: Falcate brace template

This is a fairly close version of Trevor's medium SS. I think the most important bit as Martin has suggested is to make sure they fit cleanly between the bridge pins.
by Dave M
Fri Jul 16, 2021 2:10 am
Forum: Instrument Builders Forum
Topic: Stewmac Intonator
Replies: 5
Views: 1171

Re: Stewmac Intonator

Thanks people. Time is in short supply just now so was hoping to just buy one. Dave