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Laser thingy
- Thread starter abcdef
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- Apr 12, 2009
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Search 'laser goniometer' on the web.
These devices have been around a while, and some are pretty sophisticated & PRICEY. As for perfect & precise accuracy, I think they're still somewhat limited. But organizations like CATRA rely upon them for some pretty sophisticated testing of edge geometry vs. edge retention and sharpness.
Due to price of the good ones, maybe not 'practical' for hobbyists. But definitely not 'gimmicky', in that they can be useful instruments in knowledgeable hands.
These devices have been around a while, and some are pretty sophisticated & PRICEY. As for perfect & precise accuracy, I think they're still somewhat limited. But organizations like CATRA rely upon them for some pretty sophisticated testing of edge geometry vs. edge retention and sharpness.
Due to price of the good ones, maybe not 'practical' for hobbyists. But definitely not 'gimmicky', in that they can be useful instruments in knowledgeable hands.
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abcdef: Someone Ken Leonard made a laser device for measuring blade angles. It is on one of those sites where new products are sold kickstarter laser-knife-edge-reader-for-better-knife-sharpening . The object is to get accurate LASER before/after sharpening measurements.
Does this sound practical, or gimmicky?
Hi,
Its both
the gimmick is you can take a picture of lasers and share with your customers
cutting doesn't require lasers, sharpening doesn't require lasers , edge angle measurement doesn't either
also laser pointer costs ~one dollar shipped, why pay 40 to 100+ times more?
Making Your Own Goniometer: How To?
Does this sound practical, or gimmicky?
Hi,
Its both
the gimmick is you can take a picture of lasers and share with your customerscutting doesn't require lasers, sharpening doesn't require lasers , edge angle measurement doesn't either
also laser pointer costs ~one dollar shipped, why pay 40 to 100+ times more?Making Your Own Goniometer: How To?
I use a CATRA Hobbigoni blade edge protractor:
http://www.catra.org.uk/CATRA_Hobbigoni_blade_edge_protractor_p/cuhg.htm
It works pretty well, but can be difficult to use, especially if you're dealing with a coarsely ground edge, which scatters light. In addition, convex edges don't give an angle (convex edges do not have angles), but rather a reflection of all possible angles along the edge -- basically a range of angles measured at each point on the edge.
It does seem that a homemade device like the one above should work, as long as you get everything perfectly in line.
http://www.catra.org.uk/CATRA_Hobbigoni_blade_edge_protractor_p/cuhg.htm
It works pretty well, but can be difficult to use, especially if you're dealing with a coarsely ground edge, which scatters light. In addition, convex edges don't give an angle (convex edges do not have angles), but rather a reflection of all possible angles along the edge -- basically a range of angles measured at each point on the edge.
It does seem that a homemade device like the one above should work, as long as you get everything perfectly in line.