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Rosette Assembly
http://luthiersforum.com/forum/viewtopic.php?f=10101&t=42593		 Page 1 of 1
Author:  EddieLee [ Fri Jan 31, 2014 12:21 pm ]
Post subject:  Rosette Assembly
If you are making a rosette with a wood ring center with BWB purfling on the inside and outside of the wood ring, how would you approach assembling that.

1) Glue the purfling strips to the wood ring, then glue that into a channel in the sound board.
2) Cut a channel in the sound board, fit the 3 components in the channel, then glue up the components.
3) Another method
Author:  Colin North [ Fri Jan 31, 2014 12:50 pm ]
Post subject:  Re: Rosette Assembly
2) for me.
Author:  LarryH [ Fri Jan 31, 2014 12:53 pm ]
Post subject:  Re: Rosette Assembly
2) as well
Author:  mkellyvrod [ Fri Jan 31, 2014 12:59 pm ]
Post subject:  Re: Rosette Assembly
2) for me also
Author:  DennisK [ Fri Jan 31, 2014 1:12 pm ]
Post subject:  Re: Rosette Assembly
2, if possible. But another option is to inlay the wood ring first, and then route the channels for the strips. I've done that when using ring materials where I couldn't get it perfectly round (e.g. walnut burl veneer). Routing for the strips takes the rough edge off the ring.
Author:  ZekeM [ Fri Jan 31, 2014 1:17 pm ]
Post subject:  Re: Rosette Assembly
I use #2.
Author:  meddlingfool [ Fri Jan 31, 2014 1:29 pm ]
Post subject:  Re: Rosette Assembly
Route channel for wood ring. Doesn't need to be perfect, just close.

Glue it in, get it close to level.

Route channels for purfling using a bit sized just right for the purfling. Route will clean up spruce and rosette simultaneously. Observe climb cut protocols for cleaner edges. Spread wood glue and press in purfling, or if you're using CA, shellac channel, let dry, press fit purfling, hit with CA, presto!
Author:  Fred Tellier [ Fri Jan 31, 2014 1:57 pm ]
Post subject:  Re: Rosette Assembly
#2 also

Fred
Author:  Rod True [ Fri Jan 31, 2014 3:17 pm ]
Post subject:  Re: Rosette Assembly
What Todd & Ed said.
Author:  sdsollod [ Fri Jan 31, 2014 3:53 pm ]
Post subject:  Re: Rosette Assembly
2) for me too.
Author:  johnparchem [ Fri Jan 31, 2014 3:56 pm ]
Post subject:  Re: Rosette Assembly
One more method, Using the right sized bit for the purfling cut the outside of the rosette at the desired inlay depth. Move the router and circle cutting base to the top with same setup and cut the outside circle. Cut the inside circle on the rosette, same depth, Move the router and with the same setup to the top and cut the inside ring.

On the top remove the rest of the channel between the two cut rings. Take the rosette and run it upside down through a thickness sander until the ring drops out. Now you have a rosette and a top with a rebate large enough for the rosette and two purflings.
Author:  Jim Watts [ Fri Jan 31, 2014 4:19 pm ]
Post subject:  Re: Rosette Assembly
meddlingfool wrote:
Route channel for wood ring. Doesn't need to be perfect, just close.

Glue it in, get it close to level.

Route channels for purfling using a bit sized just right for the purfling. Route will clean up spruce and rosette simultaneously. Observe climb cut protocols for cleaner edges. Spread wood glue and press in purfling, or if you're using CA, shellac channel, let dry, press fit purfling, hit with CA, presto!


Same here
Author:  mqbernardo [ Fri Jan 31, 2014 6:10 pm ]
Post subject:  Re: Rosette Assembly
number 2 so far. will try the multi-rout approach on a future build.
Author:  Nick Royle [ Fri Jan 31, 2014 6:31 pm ]
Post subject:  Re: Rosette Assembly
Not BWB but on my current build I inlaid a 0.7mm maple veneer ring into a piece of rosewood, thicknessed that to 1mm, and then cut a ring from that leaving rosewood outlines. I did it that way because I didn't have a bit for routing 0.5mm purfling lines and I didn't want any of the rosette to be covered by the fretboard extension.
Author:  EddieLee [ Sat Feb 01, 2014 12:06 pm ]
Post subject:  Re: Rosette Assembly
Thanks everyone. Great ideas. I saw a picture of Fred's rosette assemble but did not understand why he glued in the ring before the purfling. Now I see [clap] . John I think your method is very cleaver. [clap]
Author:  Ron Belanger [ Sat Feb 01, 2014 12:20 pm ]
Post subject:  Re: Rosette Assembly
Todd Stock wrote:
Mill ring, mill recess for ring in top...glue ring in top...mill purfling recess on inner and outer edges of wood ring...glue in purfling...level and remove soundhole once the top is to thickness.


+1 for me [:Y:]
Author:  Spyder [ Sun Feb 02, 2014 12:27 am ]
Post subject:  Re: Rosette Assembly
One thing I noticed on my first attempt, using a solid wood ring, was that as soon as I cut out the ring, it started to take on an oval shape due to the grain. Nothing major, just enough to mess up my fit and drive me crazy. That alone was enough reason to inlay the ring first, then cut for the edge strips.
Author:  DannyV [ Sun Feb 02, 2014 4:14 am ]
Post subject:  Re: Rosette Assembly
Cut whatever you are using for a ring, tiles, solid, whatever, cut the inner or outer side with the same size bit as the purfling. Take your router to the top without changing the setting and make a cut. Do the same to the other side of the ring and take the router to the top without changing the setting again. Hog out the rest of the remaining wood in the top and glue the ring and purfling in in one go. Works best with a bit that is a tad bigger than the purfling. It makes it easier to get it all in place. Using water based glue will swell everything up for a nice, tight fit. I think I learned that here from Brock Polling.

I guess that was what John just said. duh
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