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Rosette cutting jigs ... let's see'em!
https://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=18096		 Page 1 of 1
Author:  Terence Kennedy [ Wed Jul 23, 2008 11:37 pm ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
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Author:  Arnt Rian [ Thu Jul 24, 2008 5:29 am ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
I've shown it before, but what the heck...

This is my favorite rosette jig, modeled after the Sylvan Wells / Tony Karols / the "Luthier tools" book jig. I like it because it is sturdy, has no backlash and can be easily adjusted. My rosettes are usually different each time, and this jig allows me to adjust to a new setting fast and accurately.

PC 310 trimmer, 15 mm acrylic base, 6M threaded rod, steel rods and thumb screws from discarded router fence, an hour or two of work.

Top view:

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Bottom view:

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Author:  bob_connor [ Thu Jul 24, 2008 5:48 am ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
Here's mine. Very Simple.

Bob
Author:  mtracz [ Thu Jul 24, 2008 7:31 am ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
Here's mine.

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Modeled after the one used in Bogdanovich's book.

Works great! And was simple to make.

_Mike T
Author:  Alain Desforges [ Thu Jul 24, 2008 8:12 am ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
I have one like Arnt's. IMHO, the micro-adjustment is the bee's knees! My old circle cutting jig didn't have it and although cutting the channel was easy, I had to adjust the width of cut by slightly tapping the carrier tray. I didn't like this at all.

Now, one full turn of the knob equates to about 10 thou... It's quick and painless and there's no guesswork involved.

It might be a bit more difficult to machine the parts and to build, but use it once, and you'll know where the extra effort went. You'll also need a tap and die set. If I'm not mistaken, I had taken a whole bunch of pictures when I put mine together. I'll try to fish them out and I'll post them if you're interested.
Author:  SkyHigh [ Thu Jul 24, 2008 9:57 am ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
Wells-Karol Jig is what I'm thinking of getting. I'm just not sure if I want to spend 3 hours to make it(shopping for parts/labor) or buy one.
Author:  TonyKarol [ Thu Jul 24, 2008 10:05 am ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
Pretty obvious which one I use .. just made two more yesterday for a couple students to snag.

Might have to put some together for the next swap meet ...
Author:  Brad Way [ Thu Jul 24, 2008 8:41 pm ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
Here is one I built a while ago.Similar to others but with the added feature of being able to "template" a rosette design. My feeling was that as I figure out a rosette I could drill a template for future use. The template would allow the jig to be returned to the same size at anytime without trial and error.

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Author:  Brad Way [ Thu Jul 24, 2008 9:55 pm ]
Post subject:  Re: Rosette cutting jigs ... let's see'em!
fmorelli wrote:
Brad - that looks very cool, though I must admit I don't understand how the template part works ...

Arnt ... how is yours different than the Karol / Wells setup?

Thanks,

Filippo


It is a little hard to see in the pictures. But basically it lets you set the jig and use a pin locating system to remember where the jig was. In the future if you want to recut the same rosette then you can put the pre-drilled template in the side of the jig, lineup the bronze bushing with the pre-drilled holes on the template, and slide a steel locating pin through the bushing into the template and everything should be exact adjust to a previous size.
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