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rosette advice http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=28851 |
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Author: | rono [ Mon Aug 30, 2010 10:18 pm ] |
Post subject: | rosette advice |
I thought this was going all too easily.... ![]() DSC01744 by pbr4life2002, on Flickr One of the black strips didn't make it. It was pinched out or pinched under. ![]() ![]() DSC01748 by pbr4life2002, on Flickr Question: Should I scrape a little more? There could be a bit of black down there. Or, should I route out the inside rings and re-do those strips? I think I should route out that set of b/w/b/b/w/b and redo that ring. |
Author: | Mike OMelia [ Mon Aug 30, 2010 10:59 pm ] |
Post subject: | rosette advice |
How did you do that? Were those purfling strips that u purchased from lmi etc, or did u make them? It could be that the white has folded or spread over the black. See if that is a real edge or a flap of white over the black. |
Author: | Mike OMelia [ Mon Aug 30, 2010 11:08 pm ] |
Post subject: | rosette advice |
Ok, I studied the pic a bit closer. That's wood strips between the white fiber, right? How thick were the inlays before you started the insert? Did you get them all the way into the slot? My tops are 0.1" thick. I make my slots about 0.06" deep, and my inlays are about 0.08 to 0.1" thick. After inlaid, I measure the stuff above the top to see that I get what I should. Too much and I know I am not deep enough. Then and only then do I use the glue. Btw, water based glues will expand the inlay a bit. Account for that up front. If that is not a flap, then you may not have had enough of the rosette in the slot. In which case, rout it out. No biggie. |
Author: | Jim Watts [ Mon Aug 30, 2010 11:37 pm ] |
Post subject: | Re: rosette advice |
rono wrote: I thought this was going all too easily.... ...Or, should I route out the inside rings and re-do those strips? I think I should route out that set of b/w/b/b/w/b and redo that ring. I would redo the lines. |
Author: | tim88 [ Tue Aug 31, 2010 4:33 am ] |
Post subject: | Re: rosette advice |
Ron, I had the same problem on my first. I tried to scrape it and scraped through a small spot on the rosette because it wasn.t deep enough. When I routed it back out, I ended up with some tear out, which made the problem even bigger. So I had to route out even more. I ended up with a rosette that was almost 3 times as wide as planned. The rosette turned out really wide and you can still see a little of the tear out if you look closely. Others have complimented me on it but I know the truth. Hey at least it sounds great. ![]() Looking back at all the mistakes made on most firsts, this is relatively minor. You might consider leaving as is. ![]() |
Author: | alan stassforth [ Tue Aug 31, 2010 9:59 am ] |
Post subject: | Re: rosette advice |
can you take another pic straight on and a little furthur away than the top pic is? i didn't notice the flaw in the first pic. it might not look so bad. is the git for you or a customer? my gits are flawed like crazy, and i try to do better on the next one. if you try to fix that, you might mess the hole (ha!) thing up. |
Author: | jfmckenna [ Tue Aug 31, 2010 10:27 am ] |
Post subject: | Re: rosette advice |
I'd try to get in there with a knife and inlay the strip in. Done right you will never know, done wrong then just rerout. |
Author: | Nate Swanger [ Tue Aug 31, 2010 11:33 am ] |
Post subject: | Re: rosette advice |
Looks from the picture that the two BWB didnt seat quite tightly at that spot or at least from that view it appears that way. then when you routed for the hard wood band it chewed right through your outer Black band. Maybe if you have a router bit small enough you could route out just that ring that didnt seat well and lay a new one in. I know they make em small, i've seen ones at PCB manufactures that are measured around 20-30 mils. (granted they are used in CNC). Probably expensive though... If it were me (im only just finishing up my first) I would see about trying to "cut" out that section and inlay another piece of BWB first (as others have also said) If that doesn't turn out acceptable then just route the whole BWB BWB section. though i might be worried that the new section will end up with gaps between them and the hardwood... though with it being black you could always mix up some epoxy with ebony dust to gap fill, did this on my fret board and can hardly notice the difference. Any way, just my thoughts on what i would try if it were mine, as i said, only working on my first so take my advice with a grain of salt. Nate |
Author: | Brock Poling [ Tue Aug 31, 2010 11:34 am ] |
Post subject: | Re: rosette advice |
It looks to me like what happened was that the missing dark line wasn't seated in the channel all the way down and when you leveled it completely sanded it away in that spot. If it were me I would route out all the inner lines and redo those. Make sure they are tight without being TOO tight. My rule of thumb is that you should be able to put them in and take them out with your fingers with mild/firm pressure. If you really have to press them in or use a tool when they are dry it won't work once they expand under water based glue like LMI white or titebond. |
Author: | Brock Poling [ Tue Aug 31, 2010 11:35 am ] |
Post subject: | Re: rosette advice |
Nate Swanger wrote: Looks from the picture that the two BWB didnt seat quite tightly at that spot Nate Jinx.. I was typing the same thought. ![]() |
Author: | Nate Swanger [ Tue Aug 31, 2010 11:38 am ] |
Post subject: | Re: rosette advice |
Brock Poling wrote: Nate Swanger wrote: Looks from the picture that the two BWB didnt seat quite tightly at that spot Nate Jinx.. I was typing the same thought. ![]() Great minds think alike! ![]() J/k, my mind is definitely far from great |
Author: | rono [ Tue Aug 31, 2010 7:40 pm ] |
Post subject: | Re: rosette advice |
I went in there with a razor blade and determined that it wasn't just a flap of white over a bit of the black strip. As many of you explained, the black strip must have never made it into the channel. I'm sure they were too tight. I had to really work to press them in. I'll route it out and make another go at it. They were so tight I should be able to do it without adding other layers. Thanks for all the help and quick replies! I'll post a picture once I get it done. |
Author: | Mike OMelia [ Tue Aug 31, 2010 10:44 pm ] |
Post subject: | rosette advice |
Hey, I got something right! Guess how I knew it!! Tub o lard for the winner. You can buy itty bitty router end mills on eBay at 10 per pack for $20-$30. These are CNC type bits and given our duty cycle, will last you forever. Kudos to Rod True for that tip. I use some that are 1/16" in diameter. They make them even smaller. Problem is if your soundhole is already cut. Then, unless you have incredible luck, finding center is all but impossible. |
Author: | rono [ Tue Aug 31, 2010 11:01 pm ] |
Post subject: | Re: rosette advice |
![]() the repair channel came out really clean. here is where the mistake used to live. this is WRC from shane. ![]() DSC01781 by pbr4life2002, on Flickr I'm more than pleased with this outcome. please excuse the dirty picture. I'll finish scraping when the glue is 100% dry. I think the little tear-out in the top, left hand side of the rossette is shallow enough that it will disappear with final scraping, too. ![]() DSC01805 by pbr4life2002, on Flickr here is the close up of the spot that was bad before. ![]() DSC01809 by pbr4life2002, on Flickr mike- these are strips from lmii and i'm using a 1/16" bit from here: http://www.cetdirect.com/catalog/produc ... _id=222792. I think I overpaid....they're $17 each. thanks again for all the advice! |
Author: | douglas ingram [ Tue Aug 31, 2010 11:34 pm ] |
Post subject: | Re: rosette advice |
Good recovery. You'll be glad that you went through the extra effort now and not just leave it. |
Author: | Mike OMelia [ Wed Sep 01, 2010 12:15 am ] |
Post subject: | Re: rosette advice |
Yes, very nice recovery. And yes, you way overpaid. Go to ebay and search for end mill bits. You will be able to buy 10 for that price (that's how they are sold, 10 in a plastic box). Scrape, fill with CA, then sand flush. Then, and only then, rout out the sound hole. Mike |
Author: | JasonMoe [ Wed Sep 01, 2010 3:19 am ] |
Post subject: | Re: rosette advice |
Nice work, Nice recovery, that top is aweome. Very nice tight lines. |
Author: | Fred Tellier [ Wed Sep 01, 2010 8:32 am ] |
Post subject: | Re: rosette advice |
Great rework and a lesson can be learned for all of us, don't cut the sound hole until you have sanded and are happy with the rosette. By having the original locating hole for the routing made this much easier to do. Fred |
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