Official Luthiers Forum!

Doing OM/000 14 fret. I know some previous articles on this but can't find.
how far down from outside of rim should center of the soundhole be? I have been using variant plans and all measure different.

How far from say center of x brace should bridge plate be. I don't know if doing right. Used to use plan diminsions. Thinking of using fretboard and laying where 14 fret meets, but then measure from the 12th, using the nut to 12th x 2 plus .100 to bridge. Is that ok. I the +.100 is to saddle so how much wider to make sure have stability for pins?

Michael are the diminsions you used on your plans okie dokie for use and if just use those should be ok. I think trust your measurments and plans more than others I have. Just want to make sure before cutting 4'hole. That is other thing. Does 4' SH make difference in placing x braces and bridge plate. Shouldn't think so on the bridge since that in a math thing pretty much constant
Ok more than 2 questions. have alot going on lately and suffering from brain fart syndrome

4" dia hole 5 5/16 from edge of rim to center of the hole. They are the dim's I have taken from several Martins I have worked on and modified to very little for my own constructions. If you are using a set of my plans you will notice the bridge in phantom lines has plenty of room to adjust for you scale length and compensation. The distance from the 12th to the center of the saddle for my 25.4" scale is 12.8510 this includes .1 compensationMichaelP38408.4139930556

Stan

Did this cover your questions?

Michael,

Thanks for the info. on the Martin OM specs. So they all had 4 inch soundholes? The plan I got from LMI sometime back, showed 3.875 I think as the sound hole size. I was thinking of just bumping it up to 4 inch anyway.   

Jeff

No problem. there may be some that use 3 7/8 I don't see a big issue there. I have always used 4" on OM's

Jeff

I honestly don't think it would make the slightest difference if you used 3 7/8" or 4" for the sound hole. There are so many other variables in the guitar that this is really small beer. My cutter is set for 4" so all my guitars seem to get that.

Colin

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I don't believe in anything, I simply make use of a set of reasonable working hypotheses.

Micheal that did cover it and much appreciated. I was on the same line as you in that. I just had one plan that when using a rule, was over 7" and one littel less than 5. I think yours are the best out there for accuracy IMHO Anyone out there looking at this, yes it is an unsolicited highly recommnended endorsement of MP's work with the CAD and what you get for the price

I get in the real world $25.00/hr for simple drafting $50.00/hr for 3D modeling and 3D rendering. but I give a big break to the luthiers and a huge break to OLF members. The plans that go in the OLF library are purly donated. As you may know I do 3D rendering of guitars to give clients a pre construction Idea of what the aesthetic appearance of there guitar will be prior to construction. This service is available to Olf members at a very reasonable rate. Typically it is body (top, back, sides, binding, purfling rosette, lining and braces)only in as many rendered views as needed but I will go as intense as needed i.e. designing inlays, logos, necks whatever. for additional charge. here is a low res. example


I don't have web site or I would post a hi-res. so you could see the detail I offer.MichaelP38408.6229282407

Michael,

Do you do 3D drawing in prep for CNC work?

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John Mayes
http://www.mayesluthier.com

[QUOTE=John Mayes] Michael,

Do you do 3D drawing in prep for CNC work?

[/QUOTE]

Jhon I can. What do you need?

OOH! I know where John's headed

I've decided that even with a small shop my next purchase is going to be a CNC machine, I've been cadding my designs for a while now using Turbo-Cad and it works pretty well but I want to graduate to doing 3D and then to doing CAD work. I've been looking at K2 CNC and am going to get their 39" x 25" x 5" model, I figure with that I can do simple things like bridges and inlays and complicated things like neck profiles. It would be nice to be able to create all my parts to a specific tolerance and then concentrate on the aesthetics and other things of building guitars...

What software are you using Michael?, I have Turbo-Cad and Quick-Cad and like Turbo-Cad better (more features, better interface) but I find Turbo Cad confusing sometimes...

Thanks

-Paul-

Sprockett38411.5387037037

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-Paul-

Patriot Guitars

I use a combination of three. They are all AutoDesk products. For basic modeling I use Autocad 2005 and Autovision (now std feature with Autocad 2005) for material mapping and Ray trace rendering. For environment and scene rendering I incorporate the fore mentioned output into 3D studio, but only if animation or flybys are required. FYI cost of software $10,000 plus. Gald the company pays for it

I was thinking of the programming for necks. How much, ballpark figure,
would you charge to do a complete 3D drawing of a acoustic neck? You
can e-mail if you don't want to say online.

_________________
John Mayes
http://www.mayesluthier.com

John, too much. You really need to fine some one with a digital surface indicator, a tool that measures and maps complex surfaces and creates the point cloud from it's readings. I could do it but the time to gather the data and manually input it would be in the 40 hr range so If I had to guess I would say $1,400. There are companies out there that this their specialty and can do this for peanuts compared to what it would cost for me to gather and input the data manually. Don't get me wrong John, I love this kind of work, but in the Cam point cloud realm I am not the economical choice. Now modeling and rendering for artistic or present ion work I can compete.