Primitive Archer
Main Discussion Area => HowTo's and Build-a-longs => Topic started by: BigWapiti on May 05, 2008, 02:14:47 am
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I've tried and tried, following website tutorial, but still can't succeed at consistently putting a good cutting edge on my scrapers. Sometimes I do something right and I can scrape nice curls for a couple hours. Most other times, sawdust. I even went and bought a veritas adjust burnisher - hearing they were the peaches pie of scraper sharpening. My odds haven't changed. The scrapers I bought stayed sharp for days - after i "sharpen" them, I'm lucky to get a couple hours. Maybe I'll just keep buying new ones, and put my old ones up for trade... ::)
Can someone do a how-to on sharpening?
I searched here and didn't find a link - I'm surprised though, am I missing it somewhere?
Thanks guys.
Mike
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Mike......Roger Sparks did one last year I think. Its probably still on the bows forum me thinks ? BTW way scrapers er good fer 15 mins er so accodring ta luthiers then ya have ta resharpen them. Coupla hours sounds good ta me. Make sure the edge ya are rollin' is flat and has new metal showin' thats probably why the store boughten ones seem better. Just a thought.....bob
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Thanks Bob, I've been filing them flat and then using my burnisher to roll the edge. or should I say, trying to roll the edge. :)
but if you say 15 minutes, maybe I'm not doing too bad then. I guess that patience gig is biting me again. I enjoy my time in the shop building these bows, but sometimes I just want the thing bending quicker than I should. Its good for me.
Thanks again, I'll search the bows forum - Thanks.
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Ok, I found it - I must have been mistyping "scraper" - this time I found the link Bob was talking about, from Roger.
Sorry about that folks - but since I made ya look - here's the link...
http://www.primitivearcher.com/smf/index.php/topic,1237.0.html (http://www.primitivearcher.com/smf/index.php/topic,1237.0.html)
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Try using thicker material for your scraper. On thin ones like cabinent makers use you have to file and burnish often. Thicker material allows for more removal per sharpened edge. Just another option.
Tracy
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okay, so i sharpened and burnished it, and used it on some osage that had grain runout...and got some serious bumps and dips...but i can see how well this will work on straight-grained wood
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belt sander as per Pappy ;D
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Try using thicker material for your scraper. On thin ones like cabinent makers use you have to file and burnish often. Thicker material allows for more removal per sharpened edge. Just another option.
Tracy
Tracy, yeah, I had actually used a scraper from 3 Rivers Archery - its thick, about 1/8" - I worked 2 vine maple bows using that one scraper. It lasted a long time, but has proven to be a real bugger to sharpen back to retain that same edge/curl as it had when new. But I agree, I love the thicker scrapers -- easier on the hands and don't get as hot. Seem also to not skip as much as thinner metals and I get more control for a flatter surface. -Mike
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This is another option. In my final stages i like to use scrapers and sandpaper "and we know how quick sandpaper will dull a scraper" so i was all the time resharpening my scrapers so i thought i would give this little device a try. In a matter of seconds you can have an edge 0-15 degrees. I have used this for a few years and if you use scrapers a lot you might want to give this a try.http:// www .woodcraft .com/family.aspx?familyid=3739
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Ken, thanks - - yeah, as my original post states, I have one of the Veritas Adj Burnishers as well. Unless I'm just not getting it, I seem to get a better burr using my screwdriver across the scraper than I do with this tool. why? I really ask. because I read posts that its the next best thing to sliced bread (or fill in your own favorite cliche'). What's your trick to using it. I was surpised that when I received it, it came with no instruction. its really not -that- easy to use, correctly. Is it? I end up with plastic pieces laying near the scraper - from the burnisher - that can't be right.
I don't mind showing my ignorance - help?
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ooops! I should have read it better:)
I hit mine on a flat stone a few swipes to square up the edge. I then put the scraper in a vise and with the dial set on zero( Facing it, the dial will be on the right side when you are pulling it toward you) then i pull the burnisher toward me with 3-4 times with moderate pressure." If this isn't done you will never get the edge". Then i set the dial at the degree of burnish i want and pull it toward me again 8-10 times with moderate pressure. You should be able to feel the lip to see if you have a good curled edge. If not i hit it a few more times. It has worked well for me and has saved me alot of time. I hope you can get it to work for you.
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I just hold the flat edge on a belt sander ,for just a few seconds then flip it around and do the
same,Be sure and hold the edge flat and that is all there is to it.It may not last as long and burnishing it but it only take a short time so you can do it often.I have tried a lot of way but
they take to long for me and don't last much longer. :) Quick and easy ,Ya that's me. ;) ;D
Pappy
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Ken, thank you! I'll give that a shot. That 0 degree thing, might be my ticket.
And Pappy, I'm certainly into easy - I'll give that a go too!!
((I'm on a business trip to Dayton, OH this week -- wow, there's a lot of "trees" around here, compared to my eastern WA home - bows bows bows!)) :)
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THANK YOU PAPPY for that information. I used a piece of bandsaw steel...touched her up on 12o grit belt on my sander and been making osage and ipe shavings...lovin it, quick and easy.
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Without directions i would have been totally lost. Heck most of the time with directions i'm still lost ;D
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I just hold the flat edge on a belt sander ,for just a few seconds then flip it around and do the
same,Be sure and hold the edge flat and that is all there is to it.It may not last as long and burnishing it but it only take a short time so you can do it often.I have tried a lot of way but
they take to long for me and don't last much longer. :) Quick and easy ,Ya that's me. ;) ;D
Pappy
Thanks Pappy - so does that method put a burr on it too? or is it making it more like a knife blade? curious.
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For what it may be worth I put and edge on kind of like Pappy. I sharpen my scraper with a grinder then finish of with a "flapper wheel". ( it's a wheel that is made of a bunch of pieces of sand paper thet flap as it is spun with an air tool, can be found at most hardware stores)
My neighbor went to a wood carving show and a guy there showed him how to sharpen with the flapper wheel. It does not have a burr for the edge but seems to curl nice pieces of wood off for me!! ;)
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Pappy, do you hold the flat side of the scraper on the belt like you were sharpening a knife (A.); or hold the thin edge on it (B.) like you were trying to square the edge up?
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I hope I aint doing it wrong but I hold it like on B...edge to the belt (120 grit) to flatten it nicely. I do burnish the edge with an old round backed chisel from my lathe and it seems to work nicely.
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i found this tutorial on youtube
http://www.youtube.com/watch?v=rfUi8Nm6_Jg
david
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Like B Steve, I always did like multiple choice tests :D
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I just take the edge over a flat stone by keeping the scraper diagonally like when you use a plainer, that's pretty much the same method as Pappy basically but without power tools ;D ;D
Quick, easy, and it last plenty enought
....Hoo yeah like picture (B)
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i tried using a steak knife sharpener, you know like the round metal thing with groves running length wise. i used that instead of the file because i kept getting a rough edge on my scraper. i just clamp the scraper in the vice, run the sharpener on it just like you would the file, and then burnish. it took like 1 minute and it was sharper than when i first got them. i do like the idea of using the belt sander, but right now ive got 40 grit on there for grinding laminations :P
Phil