Diamond Stones shaped for convex edges
- This topic has 20 replies, 12 voices, and was last updated 04/12/2019 at 6:47 am by
.
-
Marc
(MarcH's Rack-Its)1 user thanked author for this post.
Ah, I see what you’re getting at. You’re thinking of having the plates with a slight radius across the length of the cutting surface to intentionally put a convex edge on the blade. I imagine that it would be possible, but given that you can get a convex edge by making several facets and then blending them with strops without any extra tools, I don’t know if there would be much of a market for that idea.
1 user thanked author for this post.
but given that you can get a convex edge by making several facets and then blending them with strops without any extra tools, I don’t know if there would be much of a market for that idea.
Plus, we’re working on something else right now to address convex edges in a really neat way. It’s still very much under development, but the proof of concept works great.
-Clay
5 users thanked author for this post.
but given that you can get a convex edge by making several facets and then blending them with strops without any extra tools, I don’t know if there would be much of a market for that idea.
Plus, we’re working on something else right now to address convex edges in a really neat way. It’s still very much under development, but the proof of concept works great.
Keep us posted when you’re ready to break the news!
4 users thanked author for this post.
…you can get a convex edge by making several facets and then blending them with strops..
I’d love some detailed instructions/guidance on this. Does this entail rotating the stones from the plane of the blade?
The process has been described several times on the forum and the knowledge base has good article on the topic as well. Here’s a recent thread on convex edges.
3 users thanked author for this post.
The curved stone face (or curved rods) seems like a really interesting approach, but I wonder how you’d actually make it work. For instance, if the stones had a concave face and if you used diagonal down-strokes from tip to heel, the tip end of the edge would have a lower angle than the heel end. Switching to heel-to-tip diagonal strokes would theoretically result in two bevel facets at each end of the blade, with a section in the middle which would have a single more-or-less average facet angle. To achieve a uniform convex profile, you’d have to hone every point along the edge with every point along the face of the stone. Not unworkable, but I think it would demand quite a bit of focus and repeated inspections on the part of the user.
What do you think guys? Am I over-analyzing this?
The videos I posted of the two convex edges were a bit disappointing in terms of quality, but I had hoped for some commentary so that we could discuss other options and methods. Also, I didn’t make a big deal out of it, but by making a number of smaller angle incremental changes, the facets seem to blend together beautifully, making the use of strops unnecessary.
2 users thanked author for this post.
The blended bevel reminds me of digital audio, when you have enough frequency sampling points it begins to result in a near analog recording…
1 user thanked author for this post.
The curved stone face (or curved rods) seems like a really interesting approach, but I wonder how you’d actually make it work. For instance, if the stones had a concave face and if you used diagonal down-strokes from tip to heel, the tip end of the edge would have a lower angle than the heel end. Switching to heel-to-tip diagonal strokes would theoretically result in two bevel facets at each end of the blade, with a section in the middle which would have a single more-or-less average facet angle. To achieve a uniform convex profile, you’d have to hone every point along the edge with every point along the face of the stone. Not unworkable, but I think it would demand quite a bit of focus and repeated inspections on the part of the user.
There is a (conceptually) simple solution to this: make a plate with a subtle undulating ripple along its long axis. This will give a continuously changing angle that combined with moderately different strokes should produce a convex edge in a nicely controlled range.
Rough calculation indicates that with one ripple (up/down) per inch you only need about 0.55mm peak-to-trough to give 10° of variation.
- You must be logged in to reply to this topic.