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PostPosted: Thu Oct 26, 2017 6:28 pm 
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Location: Windsor Ontario Canada
First name: Fred
Last Name: Tellier
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Zip/Postal Code: N8T2C6
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Has anyone here done one of these Somogyi style rosettes or has seen a tutorial on method of doing it.

Similar that this https://i.ytimg.com/vi/MZykVTpIFng/maxresdefault.jpg

Fred

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PostPosted: Fri Oct 27, 2017 5:54 am 
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I'd also like to know how he does it... I'm far (very far indeed) from being in the know, but this is the best way I came up with. I've cut this little piece of plexi, scored a line and drilled a hole precisely in the center of the line. That way lines drawn against it are always concentrical. I use it with a marking knife and, along with the circle cutter, I just go very slowly until it fits. Sort of. I also use the plexi thing to score the material to be inlayed, then just plane it to the line.

Hope it helps.


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PostPosted: Fri Oct 27, 2017 5:56 am 
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sorry for the pic size and quality. directly from the phone. in the pic it doesn´t seem so but the line aligns nicely with the pivot center.

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PostPosted: Fri Oct 27, 2017 8:18 pm 
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Fred, here's one I did 10 or more years ago.
Cut the pockets with a router, squared up the corners with a chisel, Framed the pocket with the purfling lines and then fit the thuya segment in place. It was a pain but doable.
Attachment:
segmented rosette.jpg


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PostPosted: Fri Oct 27, 2017 10:41 pm 
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Fred,

Not exactly like the Somogyi (or John Gilbert in the 70s), but segmented in a way, I did what James did. On a variation that had rounded corners, I glued purfling to the inserts, then inlaid them each in one piece. The ebony tie bars were added last.

Attachment:
Screen Shot 2017-10-27 at 8.39.54 PM.png


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PostPosted: Sat Oct 28, 2017 5:18 am 
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Allen McFarlen posts on the Ukulele Underground Forum and he has a couple videos on Youtube. He is cutting with CNC, but you get the idea.
https://www.youtube.com/watch?v=tXtyaIfvWic

https://www.youtube.com/watch?v=HqZOi4-W53g


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PostPosted: Sun Oct 29, 2017 7:34 am 
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There's a couple of options for doing this sort of thing. First, for the "deco" style rosettes as below:

Attachment:
DSCF7793s.jpg


...cut the inlay first, but over-length, then cut the pockets to fit. It needs to be done directly into the top, because of the overlaid pieces, so is quite high risk. Square the ends of the pockets with a chisel, match the ends of the inlay to the ends of the pocket. You need a router circle cutter that is precisely adjustable for radius.

For the segmented rosettes with curved tiles like this:

Attachment:
Seg neo rosette.jpg


it's very high risk to build straight into a cedar top like this one, because the cedar is so soft and easy to damage with sharp ends of inlay. So I pattern routed the pockets (pattern and router guide bushing, corners squared with a chisel) and also routed exactly the same pockets into a piece of HDPE. The tiles were framed and glued up in the HDPE pockets, then pressed out and dropped into the pockets in the cedar top, glued and leveled. For the pockets cut in the top to exactly match the pockets in the HDPE, the router cutter and bushings need to be precisely concentric. Most aren't.

The Gilbert style segmented rosettes, most of which have all straight edges to the inlays like this, were most likely done with just chisels, but could have been pattern routed.


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