Not sure if you noticed but the drill was not alligned to the diagonal cavity box/jig. Now it’s fully aligned, holding screws inserted also.
Hopefully the holding screws are easy to source… But not impossible to make.
It was impossible to make this a one sided cnc job because precisely of these screws. Also I want to add a guide positive and negative rail feature to the two inner surfaces of each shapes to align them better and for added rigidity not needed but fun to try (for a future project).
Clearance of the walls that go in the cavity will be a 0.1 mm job - still thinking of an efficient way to do that.
Finding the right plane to orient the bounding box of the diagonal ovoid cavity was a bit of a challenge but made everything easier thereafter! Thanks Diff-Arch again what a lesson!
Without it you get this
With the plane you get this:
After that I tried forever to get the normal (the perpendicular right?) to that box’s orientation but gave up and used the shorter line of the bounding box to create a vector for perpendicular screws and separating/exploding the parts (for the easier to see display of both parts in the first picture).
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So, this jig part is really important - unplanned side project but not that hard to design now i got the idea. It will make channels drilling 10x easier and faster to drill, prevent drill breakage, prevent guitar body damage on the side of the cavities, consistent or custom angles.
Some might say that for a one off (or 3 now) guitar project, this is a bit overdone - yeahhhhh but Im not a luthier and when I drilled my first holes in the soon to become the swiss-cheese-caster - yeah, my 20mm wood drill got stuck in the wood (a traditional THICK drill bit! Impossible to get out without considerable force!
And the amp-plug that goes through that channel which I dont want to unsolder wouldn’t go through (being lazy, resoldering is kind of trivial after soldering esp32 breadboards last year) and redrilling was out of the question, just like pulling out my carving chisels for a tube! Only a 20mm forstner drill bit to try but not wide enough. And 22mm diameter hole seems the std for that channel so I needed a 22 forstner drill (or a tube saw if that doesn’t work with hard woods - tip which I picked up in a random telecaster forum yesterday. Got the 22mm drill via the mail and ready to try… (I have drill extensions but not a big enough vertical drill press)… Small garage!
My cousin’s son called me Luthier level, but at this level im just creating parts that “should” work. Im more interested in the design methods to make them as easily and perfectly as possible. The woodwork challenge is definitely there. Im holding hard not to do custom surfaces at this point -yeah, it’s eating me to try. But then again, there are a million different guitar designs I’ve seen, the point is to make a telecaster that’s perfect for my one off client.
Thing is with a T style guitar, the only thing that matters is the equipment and positioning it right. There’s almost no acoustic qualities to the guitar body shape but you have to be perfect with the neck body interface. I got a friend doing violins and he’s asked me if i can do some AI cnc real tonic wood jobs? yeah… No way… But why not for some parts… Before that I have to carve the neck, fret board that will go with the ‘next guitar’…
Here’s the cool part, the 2nd body I made had a neck hole .5mm too wide, it shows, hard to fix (would be ugly imoho) so i will adjust the GH neck model to fit within 0.1 mm torelance. I need to learn how thick paint layers will be still!
Sorry for the long write. Hope you enjoyed it. I had to get this out (while im learing azure files storage architecture the hard way - powershell scripting the whole architecture the modular/gh/hypercard way… and hope this might motivate someone or help them sleep LOL.
Since industrial engineering is not my job (i design mega storage solutions in multi clouds for a living), it’s taking a while to get to the what a cnc can do, how to do it, how to design it, how it should work ‘simply’… Which it never is!
The key to this IMOHO is like in any sport (racing, golf, billiards in the least) - align your needs, plan the way to go, adjust as you go! do your best, nature will do the rest!
