This is a gramil. and hand held channel cuter the bar indexes an edge and the cutter is spaced at the required interval for th channel
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| Routing for Rosette on Complete Body http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=13524 |
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| Author: | cbodie [ Wed Sep 05, 2007 4:25 am ] |
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New builder here! My intentions are to add a rosette to a complete acoustic guitar body without the neck. Of all my luthier books, I find their method creates a rosette route before the soundhole has been cut. Since the body is already complete, I do not have that option. Any ideas? My best option was trace my route and CAREFULLY freehand it with my Dremel/Router base around the edges. |
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| Author: | jfrench [ Wed Sep 05, 2007 4:30 am ] |
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Don't freehand it. If your soundhole is a true circle, you could use a gramil and set it to follow the soundhole. Make the cuts, chisel it out. Alternatively, you could cut a circle out of some scrap wood using a basic rosette cutting setup, put it in the hole securely (I'd use one of those brace clamps under it and maybe a drop of superglue) and route a rosette indexing off the same pin. You could also just not have a rosette. You could also just bind the soundhole for a nice clean look. |
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| Author: | cbodie [ Wed Sep 05, 2007 6:24 am ] |
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The soundhole is a true circle. What is a gramil? I've got an idea, but google.com doesn't really know either. Your alternative ideas also sound good, also. You're talking about binding the soundhole just as you would bind the sides, etc. . . in the same orientation? It appears that either one would have to trim the binding, or install it differently from the orientation of the binding.
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| Author: | Michael Dale Payne [ Wed Sep 05, 2007 6:32 am ] |
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This is a gramil. and hand held channel cuter the bar indexes an edge and the cutter is spaced at the required interval for th channel
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| Author: | Kent Chasson [ Wed Sep 05, 2007 6:46 am ] |
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Fortunatly I've forgotten the mistake that I was trying to fix but I do remember having to make a circle of wood to fill a soundhole and create a new center to rout from. Just make it a good snug fit and put a leg under it that rests on the back and keeps it in place. You don't want the circle popping out while you're routing. |
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| Author: | stan thomison [ Wed Sep 05, 2007 7:42 am ] |
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It can be a hard thing to do, as you need to know imho a known center, unless doing gramil and chisels. Go without a rosette on this one if can and remember the next time. |
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| Author: | Pwoolson [ Wed Sep 05, 2007 8:56 am ] |
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I did this once. I braced up a top before I cut the rosette. I did as was suggested and cut a plug the exact size as the soundhole. I make mine out of 3/4" plywood to reduce the chance of it popping out. It will have a 1/4" hole in the center from your circle cutter. Squeezed it into the hole, taped it in place and went to town with a circle cutting router. I do like the idea of the post to prevent you from pushing it into the guitar. |
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| Author: | old man [ Wed Sep 05, 2007 10:19 am ] |
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purfling/soundhole cutting guide Ron |
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| Author: | old man [ Wed Sep 05, 2007 10:20 am ] |
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| Author: | old man [ Wed Sep 05, 2007 10:22 am ] |
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You'll have to put something inside the soundhole for it to ride on. Ron |
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| Author: | Rick Turner [ Wed Sep 05, 2007 2:49 pm ] |
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Just goes to show how important the sequence of operations is in guitar making. Always think ahead several moves before cutting wood. |
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