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While turning to avoid honest work this morning, alibi is that the dew makes the grass stick to easily to the mower, I began thinking of some of the AAW sanctioned turning terms. I had looked in at Darrell's site to see his work in progress at http://aroundthewoods.com/bigwing01.html and ff. He uses an Oland tool like an old turner acquaintance of mine always did, and the edges of his work in progress are pretty ragged. Someone mentioned the practice of cutting from the top down, a common one, and one which produces a downhill cut in the recurve, but picks up pretty heavily without it. I was playing with a "staged" interrupted edge piece from a chunk I think I cut for some other reason which was laying on the wagon with the winter squash, and took some pictures of that work in progress.
Note I used the term "interrupted" edge, which is, I think generic enough to cover both the bark up and the whatever (see the attached) else does not involve continuous wood support behind the bevel or the sanding disk. I don't cut back from the rim, preferring to change the angle of attack on the gouge to preserve a good sandable surface. How to express what I do?
I settled on the P/P ratio, since, as my years in the military taught me, a suggestive abbreviation or acronym is a better mnemonic than some arbitrary selection of lead letters. Stands for Poke to Peel ratio, where the angle of the edge is more horizontal to peel on face grain, more vertical to poke and cut across end grain, with shearing angles in between determined by how steep the angle across the grain is on the desired contour. I use a forged pattern gouge, with a mild curvature to the nose, but ground at the same angle all the way across, rotating from a nearly broad scrape to near vertical cut as the P/P ratio increases to cut steeper across the endgrain. Note that the curve of the gouge itself protects me from pressing too hard and chipping, because it will push the flexible wing back smoothly rather than poke up into it and rip out chunks.
So what think ye, guardians of turning nomenclature, are "interrupted edge" or perhaps, in line with snide suggestion enhancing recall, "circularis interruptus" and P/P ratio descriptive enough to indicate the techniques? Can we get them sanctioned the way we have SRG?
Note I used the term "interrupted" edge, which is, I think generic enough to cover both the bark up and the whatever (see the attached) else does not involve continuous wood support behind the bevel or the sanding disk. I don't cut back from the rim, preferring to change the angle of attack on the gouge to preserve a good sandable surface. How to express what I do?
I settled on the P/P ratio, since, as my years in the military taught me, a suggestive abbreviation or acronym is a better mnemonic than some arbitrary selection of lead letters. Stands for Poke to Peel ratio, where the angle of the edge is more horizontal to peel on face grain, more vertical to poke and cut across end grain, with shearing angles in between determined by how steep the angle across the grain is on the desired contour. I use a forged pattern gouge, with a mild curvature to the nose, but ground at the same angle all the way across, rotating from a nearly broad scrape to near vertical cut as the P/P ratio increases to cut steeper across the endgrain. Note that the curve of the gouge itself protects me from pressing too hard and chipping, because it will push the flexible wing back smoothly rather than poke up into it and rip out chunks.
So what think ye, guardians of turning nomenclature, are "interrupted edge" or perhaps, in line with snide suggestion enhancing recall, "circularis interruptus" and P/P ratio descriptive enough to indicate the techniques? Can we get them sanctioned the way we have SRG?
