Twisted Dovetail
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So the twist has to be identical on the inside front as it is on the backside top for it to work?
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@krisidious said:
Nice animation Shep...
This is one of the ones that looked faked.
What makes it look fake?
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@dave r said:
What makes it look fake?
because it looks like there's not a way to assemble/dissemble it.. that's what the joint is for anyway, right?
like-- "hey bud, why don't you try to figure that one out hehheh"..
or is it inherently stronger than a traditional dovetail? -
@krisidious said:
Nice animation Shep...
This is one of the ones that looked faked.
One thing that's different about this is the miter on the end pair. I think it's done like this.
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@krisidious said:
@dave r said:
What makes it look fake?
The seam along the dovetails...
That's not a seam. It's a marking gauge line for the baseline. You'll sometimes see it on hand cut non-twisted dovetails too. It's part of the marking out for the joint. The baseline is often cut deep because it forms a guide for the chisel when cleaning out the waste.
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The mental hurdle in this joint as nicely illustrated in Scott's video is that the joint slides together along a 45 degree sloped line, not straight in as we are accustomed to. That fools the mind and eye into thinking it can't go together at all!
Steve
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if memory strikes right , the late Tage Frid shows how to layout , cut and fit this joint in his book " Tage Frid Teaches Woodworking" . Hope to give it a try just for grins one of these days.
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I had the pleasure of watching Tage Frid handcut dovetails once years ago. He came to speak to a college woodworking class I was in. We watched as he laid out and quickly cut a set of dovetails. When he was finished, he put the joint together and then he looked around the room. Not at us but at the walls of the shop. The professor asked him what he was looking for and he replied, "A dovetail hammer." No one in the class including the professor ever heard of a dovetail hammer before. Frid broke into a smile and walked over to the hand tool wall and grabbed a claw hammer. He walked back over to where he'd been working and gave one of the pins a few whacks to spread out the fibers and fill a small gap he'd created when cutting the joint. Then he held up the hammer with a grin and said, "This is a dovetail hammer."
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They slide in/out on the diagonal ?
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No.
Radial.
.skp is up.Robert
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@robertwan said:
Ipossible?
ha. wow.. at first i was thinking "ok, there's no way that's going together.. especially getting all 4 pieces to do it"
but, after checking your .skp, it appears like it will actually work.
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It could be a challenge to create a jig for cutting that one accurately!
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I made on the CNC.
Robert
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Nice and clever!
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I tried on the CNC, but it can not be done. The test is .skp file above.
Robert
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@robertwan said:
I tried on the CNC, but it can not be done. The test is .skp file above.
do you mean it can't be done with CNC or it can't be done at all?
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Chisel can be done.
I'll try to draw it later, it looked as if made on CNC.Robert
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It's not bad, I thought there would be more problems.
That's what it looks like when made on CNC, there are few problems.
1-6 can be corrected with a chisel. 7 and 8 is an empty space, but invisible.
There's only 7x7x7 [mm] to cut out with a chisel.Robert
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