Four bar mechanisms can implement almost any desired motion in very simple and elegant designs. Hackaday has an insightful starter. https://hackaday.com/2017/03/29/marvelous-mechanisms-the-ubiquitous-four-bar-linkage/ Wiki; https://en.wikipedia.org/wiki/Four-bar_linkage Valuable deep dive; https://dynref.engr.illinois.edu/aml.html Here's a video; https://www.youtube.com/watch?v=XvYNqj4awM8

Are there any resources for robot spines?

>>25915 >>200

>>25824 Kiwi's link was very good and has a lot of links that link from it that are very comprehensive. One I found might be useful if not too academic.(most of it is not directly related to robowaifus but some good data points are in it relating to power needed, etc.) Animal as a Machine and a Prime Motor and the Laws of Energetics https://ecommons.cornell.edu/items/51558415-c151-49a3-8a0f-3dcc27a1e2e9 Large set of books on kinematics at the same site https://ecommons.cornell.edu/collections/78104a5e-7f84-41ea-929a-1fc694f75ba2

Hypoid vs. Worm Gears: A More Cost Effective Right-Angle Reducer: https://www.orientalmotor.com/ac-motors-gear-motors/technology/hypoid-vs-worm-gears.html

There are some STEMMA-QT connectors which make connecting a Raspi to I2P easier, there are even hubs for this. https://www.youtu.be/-d0rOHjntAo >Yes you CAN install STEMMA-QT / qwiic connectors on a Raspberry Pi! Several popular alternatives are shown, including hats, a shim, and directly wiring a port to the board. Skip breadboarding for I2C components, and build faster, more fool-proof projects.

Does she need a bellybutton? Making a more feminine design for clothing.

>>26330 Looking good Kiwi! No, I wouldn't think she particularly needs a bellybutton (particularly during this early prototype phase). I suggest doing things that simplify printing/assembly of the mesh flats at this stage tbh. BTW, it strikes me that her Lats are a bit too masculine, but admittedly it's hard to tell w/o a 360' turntable animation. Keep up the good work, Anon! :^) >=== -sp edit

>>26330 A question which comes to my mind is: Why are you still working on a human-like body design since now we know that Make Human works for that?

>>26331 I feel the same way, I favor a very feminine and petite frame. I'll try to make her lats softer. Optimizing for print-ability while having her able to wear clothes is a delicate balancing act. >>26332 I prefer a more stylized body than I can get from MakeHuman. I fully support anyone using it. I agree that most should use it instead of investing time to make their own mesh. I'm just a weirdo who needs things just right.

>>26337 >I'll try to make her lats softer. Good thinking IMO. Also, now that I can see her backside, again, I think her gluteus maximus are too masculine. I'd suggest giving her more of a rump. >I'm just a weirdo who needs things just right. Haha. Autism isn't being weird Kiwi. It just shows you have a real vision you're following! Cheers. :^)

>>26340 Smoothed things out. Her new lats are the same size, just much rounder. It should look better while still being appropriate for clothes. Made her shoulders smaller to be slightly girlier. Smoothed her booty over, same size, just rounder. More rump like :^) You can see the original and new as halves of the mesh. Added a slight bellybutton. I remembered I made a promise, long ago. Because raisins (I also have a thing for navels :^) (Her arms and legs are random kitbashed addons for the sake anatomy.)

>>26350 >More rump like :^) Heh. Looking forward to seeing the final outcome, Kiwi. :^)

>>26332 Make human is very limited in terms of possible scopes for body design. It can work for template meshes of course, but ultimately, you'll still need to refine the minute details if you're planning on making accurate human-like molds. In this case, meshing from scratch is the best option to have. >>26337 Nice mesh design.

>>26330 Why is this and the following discussion here in the general thread, btw? Not in modelling or prototyping? I did add links for all these more specific threads into the OP. >>26642 > you'll still need to refine the minute details if you're planning on making accurate human-like molds. This might be true, I have to look into that. But the thing is, I don't want visible muscles patterns showing up not to be in the mold of the skin, but these muscles should be created separately and then show up through the skin aka "outer (silicone rubber) shell". > In this case, meshing from scratch is the best option to have. Why? Is it hard to change the models from Make Human?

This video here, which is rather 3D print related: https://www.youtu.be/kkrkR1crNEc made me think that it might work to use some (conductive) paint, primer or some similar thin liquid to galvanize these parts. This has been used for 3D prints already for quite some time, but I never saw it mentioned for wood. I was thinking some wood, cardboard or paper might be able to take a liquid deeper into the material and then this would help to alter the part to a higher degree into a part consisting of metal.

>>26371 >Outcome That'll be awhile. I went back to making a mesh based on Aigis. My heart yearns for her specifically. >>26642 Thanks, of you want it, I can upload it to Ca box since I'm focusing on a different design now. Honestly, it would be nice to have those hours of work man something for someone. >>26762 I was researching into what design aspects mater to others. That was a design that I want even sure I'd use, but saw potential to develop into something. >Is it hard to change MakeHuman models? Yes, it's a huge PITA. It's easier to start from scratch if you know how. It would've taken longer to reduce it into what I want. Plus, MakeHuman models print out ugly. I speak from experience, maybe Chobitsu remembers my MakeHuman tribes from the old board? >>26766 Excellent idea, definitely could go somewhere. Please, try it out

>>26766 Very nice NoidoDev, thank you. :^) >>26773 >My heart yearns for her specifically. She is an amazing waifu. Patrician taste tbh. :^) >maybe Chobitsu remembers my MakeHuman tribes from the old board? Yep. OTOH, your OG printing skills lore has likely improved today? And IMO you're on to something ebin with the printed flats anyway, so I'd go with that if I were you Anon.

Doesn't really fit into 3D printing, but especially Kiwi uses 3D printers to make some kind of meshes and I just found out that this here exists: >8 Best CNC Vinyl Cutters (For Every Budget!) https://www.cncsourced.com/rankings/best-vinyl-cutter/ https://youtu.be/B0chtELuYJg Cutting Vinyl with a cutting machine, including cutting a pattern into it. I'm not entirely sure if it can cut Vinyl into a kind of mesh, though. No one seems to want to do that, but I think these devices could do it. After looking more into it, I think the right variant for it would be a "Pattern Plotter Cutter". Or just a laser cutter: https://youtu.be/zObGjvjmWDk (depends on the material) - knife cutters can cut multiple layers, not precise - lasers cutters are more precise, but might create very toxic fumes ChatGPT: >Regarding cutting vinyl into a mesh, it's important to note that vinyl cutters are generally designed to cut solid sheets or rolls of vinyl rather than mesh materials. The cutting process involves a blade that cuts through the material, and mesh might not provide the necessary support for clean and precise cutting. If you specifically need to cut a mesh material, other types of cutting tools, such as laser cutters or specialty fabric cutters, might be more suitable depending on the material's composition. >In summary, a vinyl cutter is not typically used for cutting vinyl into a mesh. Its primary use is for cutting solid vinyl materials to create various designs and shapes. If mesh cutting is a requirement, exploring alternative cutting tools may be necessary. Probably none of this is worth for prototyping, especially if someone already has a 3D printer, but maybe it will be useful for some local serial production of robowaifus in the future. Some of this might also be a way to make flexible circuits for electronics.

>>26846 Neat! There are also mid-tier vinyl/paper CNC-type paper cutters out there for not too expensive. Would be a good way to try shell prototyping on the cheap.

In a week or two, I’ll start looking into integral sensors (stuff that needs to be placed/accounted for before the design is “finalized” (rev1))— stuff like limit switches, thermometers, ammeters, voltmeters, maybe a couple strain/distance sensors. (many of these are only needed for the prototype, since I need to evaluate potential points of failure or get data for future design improvements) Anyway, the requirements I know for sure now are: (sensor) (interval or latency) 30+ thermometers 1.0s +- 1s 8 ammeters 100ms +- 50ms 4 voltmeters 1s +- 1s 10 limit switches <100ms, <50ms ideal 8 “rough”/RPM encoders ~ 500ms 4 “precise” encoders 100ms 2 2-axis angle sensor 100ms (probably a few more that I forgot, but hey, that’s enough to start) ‘Course, that’s a metric shitton of data with equally ridiculous wiring/IO requirements. Some of that can’t be avoided, but I’m hoping to mux and cyclically poll the thermometers, ammeters, and voltmeters: either in the literal sense (muxer upstream of ADC) or the conceptual sense (digital sensors sharing the same bus and being addressed/selected). I think the latter solution might be a tad expensive, but I don't have much experience here. Anyway, if anyone has experience with data acquisition on that scale, or ideas on how to implement it while keeping costs down, advice is greatly appreciated.

>>26846 Excellent reminder. CNC cutting tools are fantastic for everything you mentioned. With the right material and cutting tool, these machines could be great for production of panels in meshtegrity structures They're also useful for PCB fabrication at home. https://hackaday.com/2020/04/01/making-pcbs-with-a-vinyl-cutter/ As you mentioned, it can aid in flexible circuit production through cutting foil. https://fab.cba.mit.edu/content/archive/processes/PCB/vinylcut.html Many of us started with paper craft waifu. These make the prices faster and better. https://www.paperizedcrafts.com/2020/08/vocaloid-snow-hatsune-miku-paper-model.html?m=1

Bearings: >>28119 >Since silicon nitride ball bearings >>28200 >Rolamite >scroller wheels

>>28618 >placement of a speaker in the waifu? That depends, some would put it on the chest below the neck, others like myself would rather try to go with a internal system, trying to put several speakers in her neck and upper jaw, I guess. There are plenty of videos about 3D printed speakers, but I didn't deeply look into it. https://youtu.be/0tt3QHRiaRI https://youtu.be/4_4tu4rAtgI https://youtu.be/h-RSm97lkOU https://youtu.be/tZ7HznfA0YA

>>28621 https://youtu.be/lU4_E83RwUw (small, resin) .... https://www.youtube.com/playlist?list=PLh86lOr2S2w5WhsQLT9n65Olm4m0C3bq9

>>28621 >>28623 Neat stuff, Anon. Thanks! :^)

https://en.wikipedia.org/wiki/Anti-twister_mechanism - Avoid e.g. cables from getting twisted. >How can one supply a rotating lamp with energy WITHOUT a slip ring? As recently as 1971 Dale A. Adams found a mechanism although Indonesian candle dancers knew the solution for generations. We show a fischertechnik models of Adams' mechanism and another one that is easier to understand. We also briefly comment on Dirac's belt trick and the rotation group SO(3). https://youtu.be/gZvimEf6DFw >When you twist your arm or a belt by 360 degrees, the hand or endpoint is back to where it started but the rest of your arm or belt is still twisted. But if you do a 720 degree twist, you can manage to untwist your arm or belt! This is known as Dirac's Belt Trick or the Balinese Cup Trick. This crazy fact is even connected to physics with spin 1/2 particles, so let's try and figure out why! We will study rotations in 2 and 3 dimensions, and specifically study them topologically as opposed to algebraically as you might have seen before with rotation matrices. For a 2D rotation this is identified with points on a circle S^1. For a 3D rotation we need both an axis or rotation and an angle of rotation and we identify this with the solid ball of radius pi where a point in the ball gives a vector from the origin to the point that is our axis of rotation and the length of this vector is the angle. There is a catch: we have a double counting along the boundary so we have to identify antipodal points as the same. If you eliminate the origin (ie no rotation) this is sometimes called the Special Orthogonal Group SO(3) which is topologically the same as 3D Real Projective Space RP(3). A belt is then a path and I show an explicit way I can continuously deform the 4pi rotation path back to the identity. https://youtu.be/EgsUDby0X1M

>>28652 Neat! That could be useful.

Some fascinating idea about mechanics, don't know if this could be useful: https://www.youtube.com/shorts/NR75Ws54eNQ - Maybe as in inspiration to have a complex movement pattern, e.g. when walking.

Which do you prefer and why? I'm having trouble getting proportions right. Any and all comments are appreciated as part of research for development.

>>28772 It's hard to say which one I prefer definitively. If you put a gun to my head, I'd probably say four, but I have some misgivings. Do keep in mind that all of the following is just my own personal view. What matters most, of course, is what you want from your own waifu. While I like the stylized nature of the arms and legs in (1), I don't like that the hair is a part of the base model itself, the head itself is definitely too small, and the torso is too thin and underfeatured. Model (2) is right out. I could pick at little details, but the bottom line is that I don't have a realism fetish. I like the head from model (3) the most, for some reason. I can't really point to why, but it may be that it's appropriately stylized without being overdone, and it has a somewhat narrower jaw than (5). The torso has the same problem as (1), in that it's too thin and underfeatured, and the stylization of the arms and legs don't really fit to the body in my opinion. I like everything from the waist-down in (4), but things start looking weird to me in the upper portions. The shoulders seem a bit too wide, and the tits just look strange. This is hard to pin down, but they might be too low. The head is weirder to me. This is harder to pin down, but it's raising a red flag somehow. Lastly, (5) as a whole is too thin to the point of looking gangly. The neck is way too long, the head is too small, the torso as a whole looks underdeveloped, the hips don't curve enough, and the hole in the elbow just plain bothers me. Just for shits and gigs, I slapped together features from every model except (2) and resized them to get something I personally like a bit better. Of course, I fully realize that changing models around is much more involved than my efficiently lazy GIMP-fu, and I respect the work you're putting into this. Proportions become much less of a science and more of an art when you start stylizing things. It all comes down to what looks nice, and personal tastes can factor quite heavily into this.

>>28775 >I slapped together features from every model except (2) and resized them to get something I personally like a bit better. And that's really good.

>>28772 My apologies for not going in depth as you ask, but tbh I concur with every one of Greentext anon's points (>>28775). I'd recommend you try to re-create his model in a front ortho view. BTW, I'd give her a bit more of the booba than in GTA's image. :D Very good post, Kiwi. Thanks & cheers. :^)

>>28772 I just copy some of my comments from Discord over: - Two is the worst. I prefer four or five, I think. But I don't like the spheres. - I like >>28775 more as well. Fascinating how we have the same taste at the end of the day, plus minus some booba. - What I dislike with these realistic model like 2 is that curve between hip and upper tight. That dent. Drawn characters often don't have that. I minimized that in my Make Human model as much as possible. The other thing is, I think, that the thighs in such artificial models are longer, which looks better. I think I twisted that in Make Human as well and maybe I should do this more at some point.

>>28795 >I think, that the thighs in such artificial models are longer, which looks better. Yeah, that's one of the appealing things about designer waifus... we can plus things we want to exaggerate! :^)

>>28775 Perfect, I finally have the template I've been looking for. I've modeled so many designs that never felt right. This finally gives lights the path forward. I thank you for this tremendous help. It will take awhile to model the new design, I hope to collaborate further once it is done.

>>28795 >What I dislike with these realistic model like 2 is that curve between hip and upper tight. Those are called "trochanteric depressions" or "hip dips", and even some real wommins don't have 'em :D

>>28775 >>28785 >Booba Add your own silicone, it's faster and more effective to buy some fake jiggly's. Can confirm that printed booba ranges from soft but like honkin' a rubber ducky to cutting my hands from fondling too hard. :^) >>28795 Noted Newest body design using the advice given. Everything is scaled to a women of 150cm, will fit the xs women clothes. The clothes may be a tad loose, she's based on the smallest asian women. Thoughts? I'll make her arms, legs, and head after if this is goo enough.

>>28893 That looks really excellent, Kiwi. Really nice job on the cleanup as well. :^) BTW, Lin and I have a little discussion going that affects you too. Mind have a look? (>>28458, >>28874, >>28882)

I just discovered the Moiré Effect, which might be useful for making 3D printed parts changing their stiffness dependent of the orientation of the disk it is assembled of: https://youtu.be/jGoJObfYTtg https://www.youtube.com/shorts/D0nCNdl3-aA This is just a very early idea, I need to look more into this at some point or try something out. I found this while watching video in regards to magnetism, including kinetic magnetism: https://youtu.be/WPfcpHVlYZA - something about making materials magnetic or not with small amounts of electricity. Related (I didn't read this): https://www.nature.com/articles/s41586-023-06633-0 >>28824 Thanks, I'm pretty sure many slender white women don't have them. The model really wasn't a good pick in terms of looks. >>28893 Thanks.

>>28897 >I just discovered the Moiré Effect, which might be useful for making 3D printed parts changing their stiffness dependent of the orientation of the disk it is assembled of Wow, that's really interesting. I presume it will be as simple as printing different flat meshes, and then sandwiching them together appropriately?

Noise absorption, based on how materials are structured: https://youtu.be/y9-p4AkgVU8 - I have sound design and absorption on my radar for quite some time. I probably mentioned quartz sand for noise absorbtion already, which is of course additional weight. The other idea I looked into was printed music instruments e.g. https://youtu.be/QfWJbtmXOfQ - This would be more about sound design. Changing the noise that can't be avoided, e.g. to make her more sound like Ava from Ex Machina. But the idea behind the first link is about making cavities to absorb some noise. I think a combination of these will be useful, and we will experiment with this at some point. >>28878 >MyCera (printing structures for fungi) Hmm, not sure how this is going to be used. I guess we would need to print the bones with the hard material, or even leave a space for some metal there. Then the outside would need to be fungi. So maybe the hard shell would be removed, it would only be there to let the structure grow.

>>28907 >Hmm, not sure how this is going to be used. If we were to use something like MyCera it would probably be used for the bones. Cardboard bound with mycelium has similar strength to particle board so I imagine if used tougher materials like clay, sand, plastic, ect the end product would be even stronger. The advantages of mycomaterials are that they can be biowelded together, they are light, they are cheap, and they can be produced at the cottage scale. Disadvantages include they are biodegradable, they take a long time to grow, and they require a relatively sterile environment to grow.

A good explanation why learning how to program is still worth it: https://youtu.be/6CGtwF_5kzY - Even GPT-4 can not replace programmers completely, it rather helps to assist and to learn more. Related: >>128 (Programming Langs), >>159 (Python), >>12 (C++)

I think the most feasible milestone atm is a spaceframe, open-source doll. It takes care of the 3d aspect of the waifu while all the AI stuff is being developed by the greater open-source community. It can't do your dishes but I think most would be more concerned about the "waifu" than the "robo".

prototype here >>30545 and following link from >>30573 https://www.uea-inc.com/blog/what-is-a-slip-ring-and-how-does-it-work

Apptronik (Apollo Robot): https://www.youtube.com/watch?v=ab9QIzYkUgo (seems to have some CGI in it, without stating so) - Humanoid with (swapable) battery lasts 4 hours, so could be lighter with a smaller battery. - They tried wheels, and say legs work better and will win in the long run. - Dexterous hands seems to be one of the hardest things. Though, for simple tasks hands won't need to be as good as human ones. - Will cost 50k, for factory and logistic work.

>>30802 Neat! >and say legs work better and will win in the long run. The latter is probably true for general ambulatory locomotion around the home, etc. For longer-distance 'commute', however, wheels at the distal end of the limbs will clearly be faster & more-efficient. Thanks, NoidoDev. Cheers. :^)

Does anyone know where the patent for this is? Im just curious if there is anything unique or not in the lip moving mechanism. >product is remote kissing device >lead inventor Jiang Zhongli >patent holder Changzhou Vocational Institute of Mechatronic Technology >patent filed in 2019 >patent expired January 2023 I assume the patent would be listed here but I am having trouble getting past the login wall since registry isnt sending me confirmation email https://english.cnipa.gov.cn/col/col1362/index.html

>>30824 G*ogle has an effective patent search system, as well as a good index of scholarly works to boot. I hate recommending them, but for this area they are a valuable asset.