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Step 22Drawing the 3d shape
The violin consists of a 3d curve , back in the 1700's sound did not travel in a sine wave , so they tinkered with the plate shape for over 400 years and got pretty dam close to sine wave , the purest's will shoot me , but since im not making my violins out of timber , there not on my side any way .
The plate shape all starts with a curve from top to bottom ( see 1st pic ) , the sine wave curve and the rib-line meet , the 3mm over hang side starts to turn back up , around the bouts ( pointy bits on the side ) it cuts the corner , so all the curves lowest points are at the rib-line or the inside of whats called the" block" ( a block of wood on timber violins , the bouts or those pointy bits on the side )
There are lots of sine wave plotters available free off the net , you just have to enter length and height
Start with the long sine wave, i used the height of 16mm because its 1/2 of the measurement we set the hole violin out with , at 90 deg to it set out your "width " sine waves ,getting the height of each one from the long sine wave
The plate shape all starts with a curve from top to bottom ( see 1st pic ) , the sine wave curve and the rib-line meet , the 3mm over hang side starts to turn back up , around the bouts ( pointy bits on the side ) it cuts the corner , so all the curves lowest points are at the rib-line or the inside of whats called the" block" ( a block of wood on timber violins , the bouts or those pointy bits on the side )
There are lots of sine wave plotters available free off the net , you just have to enter length and height
Start with the long sine wave, i used the height of 16mm because its 1/2 of the measurement we set the hole violin out with , at 90 deg to it set out your "width " sine waves ,getting the height of each one from the long sine wave
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