Wonder if I should braid my wired earphones for storage to prevent tangling. I can keep the cable inside a pouch with the earpieces out but that's not very satisfactory.
My current fascination knitted ropes/cables/cords. These are not the typical ropes that are spun and coiled and held together by friction. These ones made of synthetic fibres look like woven tubes, but the insides aren't hollow. The insides seem packed with more woven tubes.
What I really want to see though, are 3d knitted heavy duty carbon fibre flywheels of optimal shape such that it's under equal radial stress everywhere. The shape is interesting to compute for a solid one.
> Until recently most textile fabrication processes were limited to the creation of surface-based forms.
If you enjoyed this article, you might enjoy looking at the existing knitting machines, many are fascinating and very accessible. There are models powered by a hand crank[1], or with programmable patterns[2], or open source (open hardware).
Are there croquet machines yet? Googling is really confusing with lots of forum people saying there aren't any true ones, and lots of webshops claiming to sell them.
There are some simplified crochet patterns that can be mechanized, but for the most part we haven't found a way to generically mechanize crochet.
I don't fully understand why, apparently most patterns require manipulating the yarn in a way that simply requires human dexterity?
No. Machines cannot do that reliably, it's still in the realm of research. Crochet is much less simplifiable compared to knitting
crochet, sir. croquet is a game with balls and mallets ;)
He knows what he said. Now can we have an automated machine for balls and mallets please!
Are you Daniel Craig :) ?
Long time knitter - this is genuinely interesting. I’m trying to think of a killer use case for this, because scaling this up to create something for production looks pretty hard to me, or at least like it’s going to take 5+ years, and that’s if this team works with one of the big Japanese knit-in-the-round hardware companies.
That said, I love the idea of specifying and being able to knit in 3D. We just need a brilliant designer to come up with something that would be really great to have knit and can’t be knit with traditional techniques. And like six revs of the hardware for scale, tensioning, yarn size, etc.
Anyway - really cool.
Carbon fibre, maybe? You could get a high continuous fibre content without layer weaknesses. That's got to be interesting.
Yes indeed.
In my other comment I suggested carbon fibre flywheels (for energy storage). A design that stresses the rotor uniformly to near it's breaking point would make a great storage device. If it's possible to add density to the fibres but without compromising strength even better.
For a solid material with equal strength in all direction the optimal cross section is one with an exponentially decreasing thickness. To give an intuitive reasoning, the radially inwards you go there's is more material that's straining to break free so you need larger cross-section. But this extra thickness to has to be supported as you move inwards. One can make this formal as a differential equation.
Anyhow, for carbon fibres the optimal geometry will depend on the weave because a fibre has different strength along different directions.
Nice idea! Both for woven goods and I guess parts.
Could this effectively “3D print” soft and deformable objects? How would it compare to other techniques that 3D print soft and deformable objects (I know you can print something like a mesh that is made of rigid material but itself deformable)?
Just yesterday I was mentioning about the shared fascination with everything knitting, weaving, knitting, tatting, crocheting and braiding.
https://news.ycombinator.com/item?id=46039952
Wonder if I should braid my wired earphones for storage to prevent tangling. I can keep the cable inside a pouch with the earpieces out but that's not very satisfactory.
My current fascination knitted ropes/cables/cords. These are not the typical ropes that are spun and coiled and held together by friction. These ones made of synthetic fibres look like woven tubes, but the insides aren't hollow. The insides seem packed with more woven tubes.
What I really want to see though, are 3d knitted heavy duty carbon fibre flywheels of optimal shape such that it's under equal radial stress everywhere. The shape is interesting to compute for a solid one.
> Until recently most textile fabrication processes were limited to the creation of surface-based forms.
If you enjoyed this article, you might enjoy looking at the existing knitting machines, many are fascinating and very accessible. There are models powered by a hand crank[1], or with programmable patterns[2], or open source (open hardware).
[1]: https://en.wikipedia.org/wiki/Circular_knitting#/media/File%...
[2]: https://machineknitting.fandom.com/wiki/Silver_F370K
Are there croquet machines yet? Googling is really confusing with lots of forum people saying there aren't any true ones, and lots of webshops claiming to sell them.
There are some simplified crochet patterns that can be mechanized, but for the most part we haven't found a way to generically mechanize crochet.
I don't fully understand why, apparently most patterns require manipulating the yarn in a way that simply requires human dexterity?
No. Machines cannot do that reliably, it's still in the realm of research. Crochet is much less simplifiable compared to knitting
crochet, sir. croquet is a game with balls and mallets ;)
He knows what he said. Now can we have an automated machine for balls and mallets please!
Are you Daniel Craig :) ?
Long time knitter - this is genuinely interesting. I’m trying to think of a killer use case for this, because scaling this up to create something for production looks pretty hard to me, or at least like it’s going to take 5+ years, and that’s if this team works with one of the big Japanese knit-in-the-round hardware companies.
That said, I love the idea of specifying and being able to knit in 3D. We just need a brilliant designer to come up with something that would be really great to have knit and can’t be knit with traditional techniques. And like six revs of the hardware for scale, tensioning, yarn size, etc.
Anyway - really cool.
Carbon fibre, maybe? You could get a high continuous fibre content without layer weaknesses. That's got to be interesting.
Yes indeed.
In my other comment I suggested carbon fibre flywheels (for energy storage). A design that stresses the rotor uniformly to near it's breaking point would make a great storage device. If it's possible to add density to the fibres but without compromising strength even better.
For a solid material with equal strength in all direction the optimal cross section is one with an exponentially decreasing thickness. To give an intuitive reasoning, the radially inwards you go there's is more material that's straining to break free so you need larger cross-section. But this extra thickness to has to be supported as you move inwards. One can make this formal as a differential equation.
Anyhow, for carbon fibres the optimal geometry will depend on the weave because a fibre has different strength along different directions.
Nice idea! Both for woven goods and I guess parts.
Could this effectively “3D print” soft and deformable objects? How would it compare to other techniques that 3D print soft and deformable objects (I know you can print something like a mesh that is made of rigid material but itself deformable)?
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