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Lancelot Chan
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PostPosted: Wed 10 Jun, 2015 9:09 am    Post subject: Testing my edge geometry modification         Reply with quote

https://www.youtube.com/watch?v=IiHCNeGoRUU
Testing out the tinker custom longsword after I had spent 6 hours to modify its geometry with diamond stones to very streamline.

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Lancelot Chan
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PostPosted: Fri 12 Jun, 2015 5:51 am    Post subject:         Reply with quote

https://youtu.be/yu0A0C0zPY0
After modifying the edge geometry for 4 hours with diamond stones, the angus trim bastard sword cuts thick roll with single hand easily!

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Lancelot Chan
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PostPosted: Fri 12 Jun, 2015 6:09 am    Post subject:         Reply with quote

To give a proper aspect on how difficult the cuts I usually did were, here are some students' practice videos.

https://youtu.be/KChnoOBGSq0
https://www.youtube.com/watch?v=tU9XpzqGROM
https://www.youtube.com/watch?v=5n1Ouzyxxao

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Hector A.





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PostPosted: Fri 12 Jun, 2015 8:48 am    Post subject:         Reply with quote

Very impressive, how did you achieve it? What angle are you using, describe your process.
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Lancelot Chan
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PostPosted: Fri 12 Jun, 2015 9:07 am    Post subject:         Reply with quote

Hector A. wrote:
Very impressive, how did you achieve it? What angle are you using, describe your process.


I first use a 70grit Lansky stone (discontinued, no longer manufactured) to establish the edge bevel, basing on the original primary bevel and add 10 degrees to it. I used to use DMT XXC to do it but the XXC is so heavy so it's taxing my arms very much, since I do all these with the stone hand held, sword vertical style. I have since then switched to the lighter, faster lansky extra coarse. But the lansky got used up much quicker than the DMT was. So I will switch to something else once I depleted all my lansky stones (I got 5, used up 3 already). Usually my bevel would end up from a very acute cutting sword at 30 degree total, to stiff thrusting sword at 60 degree. The edge will be very slightly convex, due to free hand nature. I would keep it as flat V as possible, though, since the later grind will make it more convex. I'll also correct the mistakes from the original grind on this stage, like asymmetrical bevel. Took a lot of effort there.

For example, the tinker sword was 60 degree edge, while my DS are mostly 30 to 40 degrees. The angus trim bastard sword is maybe 40 degree total.

I'll work with the first stone until the edge line got touched. This takes the most time and stamina. Then I will move to DMT XC 50 strokes with double directions, then C, then F, then XF, then XXF. On each of these steps, I would ensure I touched the edge line as well as polished the bevel surface with the stones. Usually it means I would have to divide up the 50 double action strokes to a few different angles to make sure I got the spots all covered. I'll check every time if the burr was flipped to the other side. If so, it means I've covered the edge line with the stone.

Finally, I use a corrugated cardboard piece to strop the burr off and made the edge "glassy" reflective. Usually it takes around 5 alternative strokes or more, depending on the steel hardness. That's how I did it.

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Lancelot Chan
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PostPosted: Sun 14 Jun, 2015 5:28 am    Post subject:         Reply with quote

https://youtu.be/QaAeEwa8Gjs
Hiu Tung Chan used darksword danish 2 hander and Edwin Chan used Longship Armoury LLC John Lundemo made Zhanmadao that I designed, to practice cutting from the sparring stance.

As a result, we figured out that the darksword danish 2 hander needed to be streamlined in the edge profile to facilitate such cuts.

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Lancelot Chan
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PostPosted: Sun 14 Jun, 2015 10:44 am    Post subject:         Reply with quote

http://youtu.be/OfCJRaWVLPs

After 5 hours of edge geometry modification, the darksword danish two hander is short cut capable now.

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Glen A Cleeton




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PostPosted: Sun 14 Jun, 2015 8:29 pm    Post subject:         Reply with quote

My DMT coarse six inch has gone to an x fine over the years. It was used too much for stock removal to reprofile blades. I have a Lansky diamond as well that has become a super x fine. As a result lately I have gone back to files, regular carborundum and a large aluminum oxide bench stone I have ground a lot with. One of these days I will get a belt grinder. Not surprisingly, my natural Arkansas and other natural stones have lasted much unchanged since the 1970s for doing fine edges. I am liking the two sided Lansky Puck for blending swords.

The DMT stuff is great but I won't buy another for basic stock removal.

Cheers

GC
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J. Nicolaysen




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PostPosted: Sun 14 Jun, 2015 8:59 pm    Post subject:         Reply with quote

Nice videos Lancelot, those 2-handed Dane cuts are really great. Looks like you took the sword to the next level.
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Lancelot Chan
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PostPosted: Sun 14 Jun, 2015 11:45 pm    Post subject:         Reply with quote

Glen A Cleeton wrote:
My DMT coarse six inch has gone to an x fine over the years. It was used too much for stock removal to reprofile blades. I have a Lansky diamond as well that has become a super x fine. As a result lately I have gone back to files, regular carborundum and a large aluminum oxide bench stone I have ground a lot with. One of these days I will get a belt grinder. Not surprisingly, my natural Arkansas and other natural stones have lasted much unchanged since the 1970s for doing fine edges. I am liking the two sided Lansky Puck for blending swords.

The DMT stuff is great but I won't buy another for basic stock removal.

Cheers

GC


Hhahahah you're the guy who knows how I feel now! My stones go through the same and eventually even revealed totally flat surface at heavily used spots, since the diamonds were ALL GONE!

I can't use a belt grinder since my wife is allergic to noise and dust, though. With hand grinding, at least it's only dust. Big Grin

But thanks for sharing. Good to see ppl who have the same feeling.

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Lancelot Chan
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PostPosted: Sun 14 Jun, 2015 11:48 pm    Post subject:         Reply with quote

J. Nicolaysen wrote:
Nice videos Lancelot, those 2-handed Dane cuts are really great. Looks like you took the sword to the next level.


Thanks for watching. Yes, with this edge reprofiling, I get the most out of the swords by turning them into their best state. ;D Still battle edge profile, just the sharpest battle edge. A flat and thin appleseed.

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Lancelot Chan
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PostPosted: Mon 15 Jun, 2015 7:47 am    Post subject:         Reply with quote

https://youtu.be/EJ6pn-LIjok

The owner tested the sword himself.

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Lancelot Chan
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PostPosted: Fri 19 Jun, 2015 6:17 am    Post subject:         Reply with quote

https://youtu.be/wgdrkx90jfU
Henry's short cut from the sparring stance with ronin O katana. Passed.

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Lancelot Chan
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PostPosted: Wed 24 Jun, 2015 6:22 am    Post subject:         Reply with quote

https://youtu.be/Y6q_nERQ3EE

The Sky Edge Long Dao I designed, made by Longship armoury John Lundemo. Streamlined and sharpened by myself, to 8000 grit and stropped.

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Lancelot Chan
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PostPosted: Thu 25 Jun, 2015 2:29 am    Post subject:         Reply with quote

Zheng Qi Ren Ching Jian factory edge:
https://www.youtube.com/watch?v=EW_JyhlXaKA

After my modification, cutting an even bigger roll that was usually for 2 handed swords:
https://www.youtube.com/watch?v=SU2xXSe-Mx4

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Lancelot Chan
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PostPosted: Sat 27 Jun, 2015 5:46 am    Post subject:         Reply with quote

https://youtu.be/mfwvA9hvAII
Streamlined Zheng Qi Ren Han Jian

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Lancelot Chan
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PostPosted: Wed 08 Jul, 2015 5:29 am    Post subject:         Reply with quote

https://www.youtube.com/watch?v=IgkuzqbyFbw
Dung Dung testing his dao modded by me, streamlined edge.


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Lancelot Chan
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PostPosted: Sun 12 Jul, 2015 3:28 am    Post subject:         Reply with quote

https://youtu.be/mguKr3NZ-2w
Dung testing grosse messer with Lancelot streamlined edge

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Lancelot Chan
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PostPosted: Sun 12 Jul, 2015 4:38 am    Post subject:         Reply with quote

https://youtu.be/Ixvk-dNrDyo
Dung dung tested lung chuan ching dao streamlined by me

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Lancelot Chan
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PostPosted: Mon 13 Jul, 2015 3:59 am    Post subject:         Reply with quote

https://youtu.be/qYPCKoiAyxg
The ching dao owner tested the sword himself.

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