Completed neck size

[Jay Cantebrigge]

Hi all

I'm new to printing instruments but not new to 3d printing; although I do still use Cura (with all options on)) haha

After dehydrating some FOUR years old rPLA (Filamentive) and calibrating the printer (CR-10 early version with the 8 bit Marlin board) I'm running a first print of a neck for the Modular Fiddle. 

Can anyone tell me what the printed dimensions w*l*h should be when completed please. 
I want to a: make sure Cura has got it right (it has screwed me 5% on an intricate fit print before now)

and b: make sure I am printing to the intended size when the print is complete.

I'm really looking forward to playing about with this and building a modular. I have some Colorfab CFPLA that I got given for free, but before I use that on a body I want to run off some old reels of PLA and make sure I'm getting the right dimensions.

As a side-note request; what torture tests have successful printers (as in you folk who printed a Modular successfully) done to calibrate your stringing settings etc... particularly if you printed via a CR-10 also

Anyway, as I say I'm really looking forward to this print, and I eventually plan to give the Hovalin 5 a bash too afterwards.

Cheers

Jay

[Jay Cantebrigge]

Two very old filaments haha.

I've started a draft print for the body in the green (dehydrated) pla, but I plan on swapping the green for black (yup, again old & dehydrated) when it gets halfway through (so that should be around 11pm tonight haha)

Are there any dimensional drawings of the whole design and the individual pieces so I can crosscheck all measurements and angles please?

Thanks

JC

[David Perry]

Hi Jay,

I love it! I've got some necks that look like this and I think they're pretty snazzy. 

re: dimensions. I don't have any dimensioned drawings, and unfortunately I'm busy the next couple days and can't get you anything. 

Could anyone out there throw together some basic dimensions for Jay? Doesn't have to be fancy, I'm guessing overall length, width at nut, width at end of fingerboard (which I should know...), that might do it. 

If not I'll get something out later this week.

-David

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[Jay Cantebrigge]

My body printed ok but with a couple of minor issues, I'll post about those later. Meanwhile, thus far we are looking like this...

[Jay Cantebrigge]

Has anyone been able to do me technical drawing dimensions at all? 

Out of pure curiosity, I printed the pegbox for the printed tuners and printed the tuning pegs also. They fit snugly so far, however, I've not yet strung the violin.

I printed out the tailpiece and two different density (and print speed) bridges last night. The tailpiece is at 25% infill, then I have one bridge printed at 60mm/s with 45% infill; then another bridge printed at 45mm/s (much cleaner lines) and only 10% infill - this has been done to check the vibrational qualities of the different density for the bridges.

I'm curious (having watched some videos and read up some research regarding f-holes) why you didn't choose to make the bottom  'flap' of the F-holes slightly chamfered? Looking at resonance & vibration scans the benefits to a Stradivari instrument of this thinner 'flap' contributed to the violin's distinct superiority for tone and volume. Especially as I noticed during the print that there is a variance in thickness for the main shell to replicate the hand-carved fluting, but this f-hole detail was done at a standard thickness for the 3d print. Is this something you have looked at previously?

Good old Aunty Amazon has just delivered my catgut wire for the tailpiece and some fine tuners. I'll rig it all up later and see how he plays (I decided it's a he as it's now named Harley due to being harlequinesque in colour)

[David Perry]

Hi Jay,

If you’d like to take measurements in CAD I would be happy to invite you in to the Fusion 360 project so you can open up the source files. You can also download the STEP files from my website and measure in your CAD program of choice, or measure the STL in your slicer to some extent. Sorry for the inconvenience! 

Good question regarding the f holes. I ought to try that! To be honest, for how the model is made, that is a non-intuitive feature, but not difficult to add. If you would like to compare a body with and without tapered f hole ‘flaps’, and I can provide one for you. 

Do you have any info on the dimensions and geometry of the taper used for wooden violins? 

David 

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[Jay Cantebrigge]

I'll take a look at my internet history later and see what I read and watched.

Off the top of my head STRAD 3D on youtube was useful, and so was this:
https://royalsocietypublishing.org/doi/full/10.1098/rspa.2014.0905

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[Jay Cantebrigge]

Yes please, invite me to Fusion 360 project

As an aside, I appear to have just bought ten varying violins for £50 from a friend. This should allow me to experiment quite a bit with real ones and printed ones :)

[Jay Cantebrigge]

Some of the other links I looked at sourced back to Strad3D but I did;t realise they charge for the documentation as I was viewing a lot of their stuff on the Strad3D youtube channel.
And the RSOP link I posted previously was the one I was reading whilst researching (not yet complete) variance in letter shaping (ie. why not D holes, or L holes or C holes would have been more natural from the kidney shapes so if you know further on using different letters as soundholes then please direct me to further info beyond the f-hole; )