Japanese kanawa joint

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Japanese kanawa joint

Postby FixitMike » Tue Oct 01, 2019 9:22 pm

The December 2019 Fine Woodworking magazine contains an article on how to make a Japanese kanawa scarf joint. Since my skills in CAD are much greater than those with a chisel, I decided to try to make the joint using VCarve. Here are the results. I used a 1/8" end mill to cut and promptly realized that the tool deflection is significant for this application. The glued together joint required a bit of sanding to make it fit, but the end result showed that the joint can be made on the CNC.
Kawana joint.png

Japanese joint.crv
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Re: Japanese kanawa joint

Postby 4DThinker » Tue Oct 01, 2019 9:54 pm

Nicely done! Yep a CNC can duplicate most joinery with some user thought and experience. To make them at a scale to build a house from though is another challenge though. :D
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Re: Japanese kanawa joint

Postby mtylerfl » Wed Oct 02, 2019 1:23 am

Very interesting, Mike! Thanks for sharing that with us!
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Re: Japanese kanawa joint

Postby scottp55 » Wed Oct 02, 2019 10:16 am

NICE scarf joint Mike!
Thanks you! :)
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Re: Japanese kanawa joint

Postby Bob Jr » Wed Oct 02, 2019 3:06 pm

Nice solution Mike.
I like your method of making the individual components, then stacking them for the completed joint. And, using the holes to help register the parts.
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Re: Japanese kanawa joint

Postby TReischl » Wed Oct 02, 2019 4:18 pm

Very kewl!

Japanese joinery is amazing.
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Re: Japanese kanawa joint

Postby adze_cnc » Wed Oct 02, 2019 4:36 pm

Hello Mike,

Time to dust off this link http://winterdienst.info/50-digital-wood-joints-by-jochen-gros/ to "50 digital joints for CNC". Many are based on traditional Japanese joinery.

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Re: Japanese kanawa joint

Postby jay pieper » Wed Oct 02, 2019 5:11 pm

Fix it Mike

First things first, great job on the kanawa joint, and the ability to apply to the software.
But I wish I would not have seen your post now I Have one more thing I have to play with.
Great job Mike I enjoy seeing what your up to, and I enjoy reading your posts on the forum.
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Re: Japanese kanawa joint

Postby FixitMike » Wed Oct 02, 2019 6:58 pm

adze_cnc wrote:Hello Mike,

Time to dust off this link http://winterdienst.info/50-digital-wood-joints-by-jochen-gros/ to "50 digital joints for CNC". Many are based on traditional Japanese joinery.

Steven

I've had the file for some time, although I've not needed to try to make one of the joints.
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Re: Japanese kanawa joint

Postby CarveOne » Fri Oct 04, 2019 12:39 pm

I might have to make a guitar neck that uses a modified version of that joint at the tuner head, using two different color woods, and give it a little slope like an acoustic guitar neck that has a simple angle joint. :D

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Re: Japanese kanawa joint

Postby Ollie » Tue Oct 08, 2019 9:51 pm

This is great, I have wondered if stuff like this can be acheived in Vcarve.

I have been fascinated with Japanese joinery techniques since I first found out about it. I have made some using the traditional tools but never CNC.

I recommend the book The art of Japanese joinery by Keyoshi Seiki. Also The complete Japanese joinery by Hideo Sato.

Warning ! this may open a can of worms for you, but there is many fascinating elements of both design and construction techniques.

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