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I've never heard of cheese eand honey together, but it doesn't sound bad 😄

You might want to check out gear or peristaltic pumps, as piston pumps have hard time with viscous fluids. Wishing luck!

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I'd like to use it for robotics eventually, though it will need a lot of improvement first.

@@writerofminds3886 I used to do hydraulics with those construction kits for children (Fischertechnik) 😄

Yes, Acuitas is my project that I coded myself.

nice@@writerofminds3886

Hi Stefan, thanks for taking a look. This project is closed source. The graph on the right shows a portion of the semantic memory (it is currently zoomed in). It's a representation of real material in the database, but it's not especially relevant for this particular demo.

@@writerofminds3886 Sure, I enjoy this a lot. Why is it closed source? What's the environment you are developing this in/for (hobby/commercial/...)? I am also in a transition to more closed source because of a commercial partnership, although I really prefer open source. I like coding on stream which I can't do when it's closed source...

@@StefanReich I don't really expect to commercialize the project in any way. It's closed source for several reasons. First, it's my personal creative work, and I'd rather not have anyone else meddling with it. Making it open-source would be a bit like releasing the first half of an unpublished novel and inviting other people to write the ending. Second, it's still in active development and everything about it is in flux. Maintaining it as a *functional* open-source project would be a lot more work; I'm not in a position to e.g. take bug reports or worry about backward compatibility right now. Third, when it does get closer to a state of being finished, I'd like more control over how it is used/deployed than is available in the open-source model. If I tried to stream my coding sessions, I'm afraid I'd be so distracted by my own talking that I wouldn't get much done. I'm glad it works for you.

@@writerofminds3886 I'm trying to say I am super-interested in taking a look at how it works. I can sign NDAs :-D I am working on a very nice parser + logic engine architecture myself - similar NLP material - and I'll be able to demonstrate a lot of it soon.

@@writerofminds3886 I'm also a bit angry with the scene. I've seen others keep their work under wraps too. What good is an invention nobody can use?

I wish I could report some progress on the spider leg, but I ended up deciding that these muscles are just too slow (and otherwise difficult to use) for that application. When I go back to that project, I might try micro stepper motors. I'd be interested to know what sort of results you've gotten out of your own work.

That's sad to hear, I was just starting a nylon muscle rig arm using similar designs to your spider. I'll let you know how that goes when I finish and test it. I use a lot of the smaller diameter muscles because that thicker material takes so long to contract it's just not suited for robotics.

+Lame Urinaldrama Yeah, pretty sure I never got anywhere near a 50% contraction. One of my better examples managed 23%.

50% could possibly achieved on double-twisted ones.

Pure Carbon Hetrochiral means it was first coiled in the usual way by over twisting and then this was then wrapped on a mandrel in the opposite direction and baked to anneal, there is a link in the description. Also if you go to the original paper on Science's website you can download for free supplementary material which explains the practical processes.

***** Awesome, thank you. Could you give me a link to the original paper? I would love to read it.

Pure Carbon You need to pay to read the main article (unless you are at a university) but the suplimentary material is available on the left here: www.sciencemag.org/content/343/6173/868

+littlestworkshop hi littlestworkshop can i ask you some technical problems? as you mentioned one year ago, the heterochiral means that fishing line was twisted in one direction, and wrap the mandrel in the other direction. but after the first step- twisting, did it need to be thermal annealing? because i think it will untwisting itself easily. i will be very thankful if you willing to answer my question:) Recently, I have a project which need to make this kind of artificial muscle.

After twisting you would keep hold of the ends to prevent them from untwisting while wrapping it.

I've done a number of additional tests, mainly to measure how the diameter of the muscle coils affects lifting strength, maximum lift distance, and current consumption. Check out this blog post and the one following: writerofminds.blogspot.com/2014/08/homemade-nylon-artificial-muscles-v.html I've only tried to run these muscles at room temperature (including some warm summer days). Different ambient temperatures will affect the resting length of the muscle, so in an actual application you would have to calibrate for that. I don't think there is a low limit on the operating temperature, beyond what the nylon itself will bear. The warmer the ambient temperature gets, the more you limit your contraction distance, since the muscle will start in a more contracted position and you can only get it so hot before it starts to permanently deform. Not sure what the upper limit is. My tests (putting bits of monofilament in the toaster oven) show that this particular brand can be annealed to a new shape at 200 degrees F, possibly less, given enough time.

The coils naturally stretch away from each other when you suspend a load from the muscle. I haven't tested this rigorously yet, but I think you can trade lifting power vs. contraction length by varying the shape of the coil. So if the weight you want to lift isn't stretching out your muscle enough to give you contraction space, you might try coiling your muscle on a larger rod (increasing the diameter of the coils) and/or stretching the coils apart a little on the rod before you anneal.

I didn't use the rod at all. Maybe that's the reason. I did it exactly like in the "original" movie presenting how it is coiling (no rod there) I wIll try with that. Thank you for tip.