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Does anyone do rosettes with this sort of "radial wood" design? What is the general procedure for making one of these?

Thanks!
Peter

I use a number of radial elements in my rosettes. Sometimes as merely spacers for the main design elements and sometimes as accents.
Though mine are rather traditional, the same principles apply to the type you are asking about.
You need to calculate the angle of the wedges (this is easiest to do on paper) which when assembled will give you 360 degrees of stock from which to cut your design, or that which will fill in between other elements. Check out my article in this past spring's issue of the ASIA mag.

About the angle:

a = ( (n-2) x 90 ) / n

where n is the number of wedges wou want to use and a is the angle as in the diagram.

Though my attempts were much simpler than the outstanding examples in the pics above (Thanks, David!) I found that printing out some polar graph paper can help with planning layout and angles.
If you are making the segments with simple wood wedges, you can glue up the segments (over the graph paper, with wax paper separator) and then cut them 'round' afterward with your rosette jig.

For polar paper: lots of spots on the web, like http://www.printfreegraphpaper.com/ or with freeware,or just buy a pad of pre-printed paper.

Cheers

John

Great help, guys.

How do you set-up the wedged piece for your rosette cutting tool? Do you use double-stick tape? I am assuming that you do not extend the wedges all the way to the center (such that it could be mounted on the center-pin of a rosette cutting jig).

Thanks,
Peter

Peter;
I did a tutorial on wood rosettes about 2 years ago.
If you look through the archives you may find it.

I can repeat it if necessary.

Mike

_________________
Mike Collins

If you search around for 'segmented rosette' you will find more examples.
http://www.luthiersforum.com/forum/viewtopic.php?f=10102&t=9649&hilit=+segmented+rosette

At one time there was a tutorial by Michael Dale Payne on more complex segmented rosettes, but I couldn't find it - the OLF tutorial section has 'gone away'??- links don't work. I also recall a sled similar to Steve Saville's (by Tony Karol??) but again, can't find it here.
Edit: and also Mike Collins's tutorial.
I'd appreciate links when somebody finds these.

Cheers
John

For AutoCad users there is a circular array function that you can select the diameter and number of segments when drawing, it can then be printed and used as a pattern to cut the segments. I have not tried it for this use but used it to make dial faces.

Fred

_________________
Fred Tellier
http://www.fetellierguitars.com
Facebook page http://www.facebook.com/pages/FE-Tellier-Guitars/163451547003866

Peter-
Strictly amateur advice here, but I don't use double-stick tape- I find it moves when I don't want it to, or grips so hard that I can't get pieces separated without breaking. It also tends to leave 'goo' behind. Perhaps I haven't found the right type/brand.
I make the wedges 'oversize, assemble on wax/polar paper with CA, then tack (with thick CA in a few spots) the edge of 'rough rosette' to a disposable workboard with the 'axle hole' drilled in it. Then I rout the ring free with the router and a small bit. I usually put some tape across the first cut when cutting the second, to try to keep things from flying apart at the end.

Cheers
John

Many of the tutorials from the old forum can be found in the thread "All OLF Archived Tutorials", HERE. There are several under the Rosette heading. Mike's is there!

_________________
Waddy

Photobucket Build Album Library

Sound Clips of most of my guitars

Thanks, Waddy. Most of the links in that thread still seem to work.
Bookmarked.

John

Give this site a once over...I think this is where I got an app from some time back that worked well for designing rosettes.
http://gicl.cs.drexel.edu/people/sevy/luthierie/software/software.html


-Matthew

Hi Peter,

I cut the channel for the wedges out of the sound board first and then glue each wedge in place. Then I cut the inside and outside channels for the purfling. That cleans up the arches on the wedges This method saves some steps. I use a fly cutter but a router with a good base and the appropriate bits would work as well. This isn't a radial rosette but I have used the same process for radial rosettes.

_________________
Ken Franklin
clumsy yet persistent
https://www.kenfranklinukulele.com

Here's how I did my first radial wood rosette.

I started off by drawing a sketch to calculate the angle and dimensions for the wedges. Sliced some strips of Myrtle burl and sanded them to thickness then used a miter box to cut the wedges.


Glued the wedges by hand on a piece of waxpaper using CA and accelerator. I added 0.030" BWB purfling strips between the wedges. Next I used double-stick tape to put it on a piece of scrap 1/2" plywood and ran it through the thickness sander to even everything up.


Used the Wells-Karol jig with a 1/8" downcut bit to cut it out.


Finally I flooded the board with a small amount of naptha and used a thin artists spatula to work it off the board


Ready to inlay. I had to put some more CA on the joints when several came loose. I like Todd's idea of using a piece of 1/64" plywood as a base and will try to find some for next time.

_________________
Steve Smith
"Music is what feelings sound like"

Thanks Todd, I'm sure I can find some in one of the local hobby shops. The rosettes are a bit too fragile the way I did it.

_________________
Steve Smith
"Music is what feelings sound like"

You could also just figure out how long you want each segment and cut the arch segments out if you have a jig like my abalam cutting jig.
viewtopic.php?f=10117&t=18878
Just set your inside and outside radius. I cut all these curved pieces from 1 1/2" or less blanks. The only lines are at the inside and outside and between the .030" MOP rings.
One more way to skin the cat.