Friday 28 August 2015

Renaissance Lute, chapter 5 - The soundboard

March 2012

Things are getting serious now, time to work on the actual sound-producing part...
I ordered some nice spruce online, coming from the french Jura mounts.
It's a special thing to count the growth rings on one of the two thin planks.
Even with the sides cut straight, the number was about two hundred...

It's time to spread out the plan.




The two planks are roughly planed to get to the same thickness. It seems to make the glueing alignment easier.


The join is prepared. Yes, that's a brick, I don't have a proper bench with holdfasts...


The excess is cut off.


So, the two parts are joined using the "nail" technique. The nails are to be oriented with the head pointing towards the center, don't ask how I found out... 


I'm using the drawers of my black chest (in the background) to press down while the glue sets.


Now the planing of the outer surface can be done.


And that's the (bad) result that I managed to get with my smoother plane -- I've learned since then, that a low angle block plane is much better for the task...


So I turned to dusting sanding.


Aaaaaah... much better.


On the inner side, the board is thinned to the approximate final thickness. I keep track with caballistic signs of how much is yet to be removed.


It's surprising how much space the shavings quickly take.


Cut to the pear shape, now it's looking like something...


And the box is (temporarily) closed !


And that's how thin it gets...


Ready for the next step, with the reinforcement paper glued on the rose underside, and the same paper on an offcut for rose cutting practicing...


Next post : Carving the rose

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