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| Scraping Spruce and other soft woods. http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=26225 |
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| Author: | jfmckenna [ Wed Feb 24, 2010 10:47 am ] |
| Post subject: | Scraping Spruce and other soft woods. |
Hello all and in particular fellow scrapers. I almost exclusively use scrapers now to get the backs and sides smoothed out before finishing. But I cannot seem to get the softwood tops perfect. The scraper seems to dust up more then curl up the wood and looking with a 10x loop I can see fibers tearing out. So I am wondering if others out there have any suggestions. Perhaps a particular scraper or sharpening technique or maybe just use sand paper? Regards. |
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| Author: | Dave Stewart [ Wed Feb 24, 2010 1:04 pm ] |
| Post subject: | Re: Scraping Spruce and other soft woods. |
The softer the wood, the sharper the scraper needs to be but yes. softwood is more difficult...... dust usually means it's not sharp enough. |
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| Author: | Alan Carruth [ Wed Feb 24, 2010 2:10 pm ] |
| Post subject: | Re: Scraping Spruce and other soft woods. |
A light, sharp burr is the key, along with a light touch. Even so, the scraper will cut the harder latewood grain more than it does the early wood, which will tend to compress. After a while the earlywood swells back up, and you end up with a sort of 'corduroy' effect. This is very much sought after by the violin crowd, since that's what Strad did. On guitars it's usually seen as a defect, so be prepared to defend yourself. |
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| Author: | TonyFrancis [ Wed Feb 24, 2010 4:05 pm ] |
| Post subject: | Re: Scraping Spruce and other soft woods. |
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| Author: | LuthierSupplier [ Wed Feb 24, 2010 4:37 pm ] |
| Post subject: | Re: Scraping Spruce and other soft woods. |
Go to this page http://www.lmii.com/CartTwo/Video.asp and go to the 2nd to last entry at the bottom. All about scrapers. Hope that helps! |
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| Author: | jfmckenna [ Sun Feb 28, 2010 1:28 pm ] |
| Post subject: | Re: Scraping Spruce and other soft woods. |
Thanks for the advice. The video is good and lots of others to see too  I sharpen a bit differently though. What I do is file the 90 deg face just like in the video but I then file off the burr and hone it with a stone. Then I lay the scraper flat and draw out a bur with the burnisher. Seems to me that just using a file would have micro nicks along the burr making the cut a bit rough. But it looked good in the video and is a bit easier to do too.
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