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R&D General NoidoDev ##eCt7e4 07/21/2023 (Fri) 15:25:47 No.24152

This is a thread to discuss smaller or general waifu building problems, solutions, proposals and questions that don't warrant a thread or touch on more than one topic. In a way this is a technical meta, minus news. Keep it technical. A lot of topics in the old thread here >>83 have a thread on their own by now. The main topics in the old thread with the link to the related dedicated threads are listed here - it was mostly about actuation at the beginning: Topics in the old OP: - liquid battery and cooling in one (flow batteries) >>5080 - artificial muscles (related to actuators >>12810) - high level and low level intelligence emulation (AI) (related to AI >>77 >>22 >>250 >>27 >>201) - wear and maintenance, including repairs - sanitation >>1627 (related to actuators >>12810) > cheap hydraulic and pneumatic muscles > woven sleeves out of strong nylon fishing line > exhaust excess heat by breathing and panting (related to thermal management >>234) >>1635 (related to energy systems >>5080) > sitting in her 'recharging chair' > swapable battery packs, air tanks > sleeve and other 'fabric' weaving TOOLS >>1691 -TOOLS- > automatic winding >>1698 -TOOLS- > looming mechanism >>1711 (related to actuators >>12810) > belt to transfer the mechanical energy to joints >>1715 (related to actuators >>12810) > not uncommon to use wires >>1716 (related to actuators >>12810) > double-end style towing sock cables (for hydraulics/pneumatics) >>1716 (related to actuators >>12810) > synchromesh drive systems >>1757 (related to actuators >>12810) > wires that themselves contract when heated >>1758 (related to actuators >>12810) > air muscles ... using an origami folding approach >>1779 (related to skin >>242) > self healing stretchable electronic skin >>1792 (related to actuators >>12810) > cable driven design >>1793 > klann linkages >>1799 > Jansen's Linkage >>1879 > software for waifu mechanical development >>1993 > hands (related to hand development >>4577) >>2032 >>2048 > decentralized computing of motion >>2377 (related to AI >>77 >>22 >>250 >>27 >>201) > AI and memory related, fuzzy NAND >>2670 --LIQUID-- > algae living in the internal water tanks >>2754 > copper for internal tanks >>2756 (related to vagoo / punani >>419) > slime onahole >>3182 (related to AI >>77 >>22 >>250 >>27 >>201) > combines MuZero, the Intrinsic Curiosity Module, Go-Explore, Hindsight Experience Replay and Divide-and-Conquer MCTS > pretty tough AI questions to solve >>3223 (related to AI >>77 >>22 >>250 >>27 >>201) > generally AI related thread >>3240 (related to AI >>77 >>22 >>250 >>27 >>201) > Flowtron ... autoregressive flow-based generative network for textto-speech synthesis >>3249 (related to AI >>77 >>22 >>250 >>27 >>201) > Tacotron, transformers >>3930 > intellectual humility >>4827 > most common methods to glue (3d printed) plastics together >>4831 > micro RC car, assembly of small stuff >>4861 > 90 facts about the human body >>5038 > DIY and inventors thread in the dollforum >>5448 > 3D printers to produce tensegrity structures >>5457 > silicone ball jointed doll ... held together by wire or string. >>5457 (related to skin >>242) > silicone skin covering the body with two layers of thin plastic in between ... skin feels like actual skin moving around >>5479 > Polyurethane foam to add plastic to the outside >>5487 > OpenLOCK >>5674 (related to actuators >>12810) > free spring calculator >>5928 (related to vision >>97) > lidar sensors for less than $100 >>5942 (related to organisation >>4143) > summarize papers and abstracts ... research sandbox >>5944 (related to AI >>77 >>22 >>250 >>27 >>201) > AI simulators >>6420 (related to energy systems >>5080) > alternative energy sources >>6503 (related to actuators >>12810) > compressor-free McKibben muscle using high-pressure electrolysis > hydrogen gas muscle >>6578 (related to AI >>77 >>22 >>250 >>27 >>201) > 'understanding'/real world context of the concept itself > quick mental images , AI, NLP >>6587 (related to AI >>77 >>22 >>250 >>27 >>201) > learning from artificial imagination > world models >>6845 > direct ethanol fuel cells >>6845 (related to AI >>77 >>22 >>250 >>27 >>201) > graph databases >>8311 (related to skin >>242) > fabric skin without silicone rubber > Mylar coated with aluminum > muscles should be fabric and a pliant closed cell foam (>>12810) > touch sensitive foam through carbon black and pressure changing resistance >>8312 (related to vagoo / punani >>419) > private parts could be like a pair of shorts with internal pockets for private parts. >>8314 >>8328 >>8361 (related to skin >>242) > Lycra, spandex, and elastane > full body suit >>8364 (related to actuators >>12810) > which bearing should be used in printed drives or in joints >>8369 > bearing types ....

Robowaifu Technician 12/29/2025 (Mon) 06:32:35 No.43504

>>42876 >>42885 I was thinking about this again as I was nodding-off at work the other day. I was reminded of the MYT swing-piston engine and something about how hydrogen in a conventional internal combustion engine can be too hard to work with because of the timing, and an experiment I saw where hydrogen and oxygen were put in a cylinder with a piston head that shot up when the gas exploded, then slammed back down even faster and harder. The implosion of the water re-condensing was more powerful than the initial explosion. This has deviated a little too much from the heart pump that I wanted to make, and I'm not interested in any kind of combustion motor, but I still figured I'd mention.

Meta Ronin (on macbook) 12/31/2025 (Wed) 04:36:09 No.43507

Introducing the Chibi Class robowaifu!

Mechnomancer 12/31/2025 (Wed) 16:09:39 No.43509

>>43507 You mean a medabot? :)

Chobitsu 01/05/2026 (Mon) 18:23:20 No.43550

>>43507 Very cute! I can see scaling dear Sumomo-chan up to these dimensions someday. Thanks, Meta Ronin! Cheers. :^) >>43509 Heh. I've rewatched a couple of these episodes lately.

GreerTech 01/06/2026 (Tue) 22:08:29 No.43568

Good section from a great website about using prongs on feet to solve walking problems https://www.projectrho.com/public_html/rocket/manamplifier.php#mechasuit

Robowaifu Technician 01/11/2026 (Sun) 22:21:40 No.43596

Metal pins in PTFE tubes makes for great hinges/linear bearings https://www.youtube.com/shorts/uc9AFSRB_LY

Chobitsu 01/15/2026 (Thu) 11:27:45 No.43654

Cool little "minimalist" robots being used to assemble some IKEA furniture. While clearly not robowaifu grade, they make intredasting studies of smol mobile platforms capable of gripper actuation. I could see this as being useful in a smol robowaifu assembly factory. https://projects.csail.mit.edu/video/research/robo/Furniture_Assembly_System.mp4

GreerTech 01/15/2026 (Thu) 12:16:28 No.43656

>>43654 >While clearly not robowaifu grade Only in form. Increase the size of the base, add legs and a body (and a head), add the two arms on the sides, beautify the outward aesthetics, and boom, a robowaifu capable of advanced tasks. A seperate smolLLM can handle personality and speech.

Chobitsu 01/15/2026 (Thu) 12:59:00 No.43657

>>43656 Heh, OK fair enough. >draw a circle >draw the freakin' owl! :D

GreerTech 01/15/2026 (Thu) 13:03:29 No.43659

>>43657 The key is to see things as possible tools or components and/or that you can modify and reshape them into useful components. After all, robowaifu engineering is just robotics shaped by aesthetic concerns.

Chobitsu 01/15/2026 (Thu) 13:18:57 No.43660

Model-Based Design and Verification for Robotics https://drake.mit.edu/ --- >related: https://drake.mit.edu/doxygen_cxx/index.html https://github.com/RobotLocomotion/drake

Edited last time by Chobitsu on 01/15/2026 (Thu) 13:30:16.

Chobitsu 01/15/2026 (Thu) 13:24:02 No.43661

>>43659 I'm just taking the piss, mate. :D Don't get me wrong, I love that you have a holistic approach with your imagination, GreerTech.

Edited last time by Chobitsu on 01/15/2026 (Thu) 13:25:11.

Chobitsu 01/15/2026 (Thu) 14:13:13 No.43666

From Toyota's Research Institute https://medium.com/toyotaresearch/rethinking-contact-simulation-for-robot-manipulation-434a56b5ec88

Edited last time by Chobitsu on 01/15/2026 (Thu) 15:19:13.

Chobitsu 01/15/2026 (Thu) 14:14:29 No.43667

MIT's Robot Locomotion Group https://locomotion.csail.mit.edu/ --- >related: https://www.youtube.com/playlist?list=PLw9EMkXLDAXox6bcbEa5xKl8XQaeZnAxu

Edited last time by Chobitsu on 01/15/2026 (Thu) 14:15:38.

GreerTech 01/15/2026 (Thu) 14:32:42 No.43669

>>43661 Don't worry, I wasn't offended at all, actually I liked the owl joke. I just wanted to share how exactly I think that way. When it comes to GreerTech engineering, no object or tool has a permanent purpose.

Chobitsu 01/15/2026 (Thu) 15:19:45 No.43671

>>43669 Sounds good! Cheers. :)

Chobitsu 01/19/2026 (Mon) 14:50:08 No.43712

Nice selection of easy to follow tutorial -like projects: https://www.youtube.com/@Dronebotworkshop/playlists

Robowaifu Technician 01/19/2026 (Mon) 16:33:14 No.43715

> (R&D -related : >>43714 )

Chobitsu 01/22/2026 (Thu) 17:28:40 No.43752

Procedurally-generated "physical" environments; useful for embodied robotics training. https://robocasa.ai/ https://github.com/robocasa/robocasa

Robowaifu Technician 02/04/2026 (Wed) 14:29:17 No.43851

> (materials science -related : >>43846 )

Chobitsu 03/10/2026 (Tue) 16:50:46 No.44093

A few episodes of Japan's Top Inventions show One of the hosts creeps me out, but the nerdy topics are intredasting >Water Jet Cutters https://www3.nhk.or.jp/nhkworld/en/shows/2091061/ >Laser Flaw Inspection Systems https://www3.nhk.or.jp/nhkworld/en/shows/2091056/ >Non-sprinkler Snow Melting Systems / Security Equipment https://www3.nhk.or.jp/nhkworld/en/shows/2091047/ The security section has auto surveillance drones (@ ~22mins), and simplistic wheeled robots (@ ~24mins) lol, they are just short of calling out nigger invaders into baste Nippon. :D >Heat-resistant Labels https://www3.nhk.or.jp/nhkworld/en/shows/2091051/ We're talking like "glowing, red-hot metal" heat-resistant. >Capsule Figures https://www3.nhk.or.jp/nhkworld/en/shows/2091049/

Edited last time by Chobitsu on 03/11/2026 (Wed) 16:40:58.

Kiwi 03/29/2026 (Sun) 01:45:28 No.44179

Currently researched mechanical demultiplexers. I've come to the conclusion that we must minimize motor use as they're bulky and expensive. Using an indexing system to choose an output for a powerful precise motor is a sensible compromise. Currently, my plan is to experiment and adapt the solution used by the Anycubic Kobra X for selecting filament. A camshaft with lobes pushes a tensioner onto the filament to engage the extruder motor. Similar can be done with nylon ropes to move a waifus limbs

Chobitsu 03/29/2026 (Sun) 02:11:02 No.44180

>>44179 POTD >I've come to the conclusion that we must minimize motor use as they're bulky and expensive. This. R/n I'm trying for very low mass robowaifu skellingtons & bodies, and driven by lots of smol (or micro, even) actuator motors. This should also keep costs way low (as will your approach) ... a very important consideration! >my plan is to experiment and adapt the solution used by the Anycubic Kobra X for selecting filament. A camshaft with lobes pushes a tensioner onto the filament to engage the extruder motor. Very cool. Glad to see you here, ol' fren. Godspeed to you, Kiwi. Cheers. :)

Chobitsu 03/29/2026 (Sun) 07:05:18 No.44182

Simple & easy to use non-loosening bolts. https://www3.nhk.or.jp/nhkworld/en/shows/2091063/

Chobitsu 03/29/2026 (Sun) 07:55:03 No.44184

Kevlar -like fabrics can be very useful as our robowaifu's 'skins' (as in: keeping the interiors relatively dry). https://www3.nhk.or.jp/nhkworld/en/shows/2091062/

Edited last time by Chobitsu on 03/29/2026 (Sun) 07:56:19.

Chobitsu 03/29/2026 (Sun) 08:55:54 No.44185

Clearly, if we are going to grill beef inside MWHNE robowaifu torso grills, we'll need some smokeless grills to both duct, keep the meat moisturized, and filter the oil for our robowaifus! :D https://www3.nhk.or.jp/nhkworld/en/shows/2091053/ >Also all this air duct engineering also applies to internal heat removal. :^)

Edited last time by Chobitsu on 03/29/2026 (Sun) 09:03:49.

Chobitsu 04/04/2026 (Sat) 00:11:57 No.44199

Very intredasting design choice for the shoulder complex. https://trashchan.xyz/robowaifu/thread/26.html#1436

GreerTech 04/04/2026 (Sat) 02:00:21 No.44202

>>44199 It is interesting. I have often thought of: what would a GreerTech Galatea Robot looks like if I wasn't beholden to making it look like an anime girl? I'm also glad that robot designers have finally got over the obsession with making robots that walk. Expertly designed wheels can conquer most building terrain, hell, most multi-story buildings have elevators.

Chobitsu 04/04/2026 (Sat) 03:10:21 No.44203

>>44202 > I have often thought of: what would a GreerTech Galatea Robot looks like if I wasn't beholden to making it look like an anime girl? DOOEET!! :DD >Expertly designed wheels can conquer most building terrain Heh, true. Blessed Easter weekend, GreerTech. Cheers. :)

Science Advances : 18 Jul 2025 Chobitsu 04/28/2026 (Tue) 12:59:25 No.44405

Special issue Printed & musculoskeletal robotics https://www.science.org/toc/sciadv/11/29

Chobitsu 05/06/2026 (Wed) 10:32:20 No.44443

I need advice for how to choose the axle rod for two rubber drive wheels for a cart waifu r/n. The wheels are suitable for driving over mown grass in a park, but the primary use case atm is simply rolling around Anon's flat. TIA.

Greentext anon 05/06/2026 (Wed) 14:38:51 No.44444

>>44443 A length of PVC pipe might be good, assuming she isn't too heavy. It's cheap, readily available in whatever size you need, tough but can also flex a little if any shock occurs, and wires can be routed through the middle.

Chobitsu 05/06/2026 (Wed) 15:15:39 No.44445

>>44444 Thanks for the advice. No this is going to need to be some kind of steel. These are high-torque motors chain-driving some fat 10"+ sized, rimmed, rubber tires (think like a smol'sh golf cart tire). I can give the ~~tech~~ checked :D breakdowns if needed. I think the OD needed for the axle is ~5/8", but I'll need to get another micrometer here to be sure. >tl;dr I'm building her to power-climb her way up stairs eventually. She'll weigh ~100lbs in the end, surely. PVC would shear into two pretty quickly, I think. >shock absorption I like your thinking, Greentext anon! I'll need to solve this as well. I'm guessing some simple leaf spring steel will wind up being suitable. Cheers, Anon. :)

Edited last time by Chobitsu on 05/06/2026 (Wed) 15:22:51.

Chobitsu 05/06/2026 (Wed) 15:46:29 No.44446

>>44445 I should clarify a little: The long-standing opus of "keep mass low" is still standing & pertinent; r/n I'm just trying to roughshod something together to help move the MaidCom project (et al) forward for the moment. For now, the cart base can be heavy(-ish). The waifu torso, etc., design OTOH should still strive for light weight. I hope that makes sense Anons.

Edited last time by Chobitsu on 05/06/2026 (Wed) 16:29:48.

Greentext anon 05/07/2026 (Thu) 03:11:39 No.44448

>>44445 Yeah, steel is the only cost-effective option that'll work for that size with those requirements. Is there a reason the axle can't be larger, though? Going just a bit larger could potentially let you get away with aluminum. As for the leaf springs, it might be worth looking into fiberglass. It's much ligher, won't rust, and strong enough that a ~100lb load won't pose a problem (though you need to be careful to buy the right kind). Granted, springs aren't really the most optimal place to look for min-maxing weight, but it's an idea to consider.

Mechnomancer 05/07/2026 (Thu) 17:22:05 No.44449

>>44445 >shock absorbers and axels could use some bike springs for suspension and a steel tube for the axel.

GreerTech 05/07/2026 (Thu) 23:21:22 No.44450

>>44444 Nice! You got the quints! >>44445 My solution, a steel pipe. As for your design, you will need the motors and batteries to back it up. Something like an e-bike/scooter, with a 48v motor. For comparison, Galatea has about 14v motors, and that's robowaifu fleaweight, about a tenth of your design. For the batteries, you should do what e-bikes do, and have several 18650 cells, with some in parallel, and some in series https://youtu.be/ZxhIs_xxVY0 https://youtu.be/Vdnjvj2EnIY Fortunately for you, 100lb at maybe ~5mph is relatively tiny in e-bike terms, though you do have the arms, and the relatively negligible amount for the computers.

Chobitsu 05/07/2026 (Thu) 23:32:38 No.44452

>>44448 >>44449 >>44450 Thanks for the posts, Anons! >fiberglass springs Neat! Hadn't thought of this; will examine. >bike springs A very good idea. I'm going for broad component availability here. >motors & batt I already have both, including the controller components. I bought all the wheels/motors/gears/electronics as a kit (~US$170 before TrumpTariff) and the battery is a lightweight, mid-tier 24V / 12AH wheelchair battery. I plan to upgrade the battery later, this is just to go on with. >100lb at maybe ~5mph is relatively tiny in e-bike terms This drivetrain system will probably be able to move this cart down the road at 30+ MPH. Going too fast will be an issue at first! :D --- BTW, I already had the steel cart kit, as I mentioned a while back in our discussion on the CartWaifu idea. --- I suppose I need to start a project thread until completion, to serve as an auxiliary one for the MaidCom thread? I still can't post pics here, so do you Anons think a tred on Trashchan is OK?

Edited last time by Chobitsu on 05/07/2026 (Thu) 23:57:42.

GreerTech 05/07/2026 (Thu) 23:45:43 No.44453

>>44452 Yeah that would be nice, it will free up space for other threads on here. I was thinking of making a new thread; World interaction, aka "But can she make a grilled cheese?"

Chobitsu Board owner 05/08/2026 (Fri) 00:00:12 No.44455

>>44453 POTD >I was thinking of making a new thread; World interaction, aka "But can she make a grilled cheese?" Yes! Please do so, GreerTech. --- We still have some thread budget headroom rn. My chief concern being you can't have a good project thread w/o pics/vids.

Chobitsu 05/09/2026 (Sat) 23:52:31 No.44467

>>44452 >"do you Anons think a tred on Trashchan is OK?" Any'non else? Yea or nay?

Greentext anon 05/10/2026 (Sun) 02:34:55 No.44468

>>44452 >>44467 I forgot that you can't post images here. Trashchan sounds good, and I'll be sure to start keeping an eye on the board there now that it's being properly used again.

Chobitsu 05/10/2026 (Sun) 12:12:09 No.44470

>>44468 >I forgot that you can't post images here. Heh. Yeah, Robi spoke about making a special accommodation of the block for /robowaifu/ at my request. Hasn't happened yet, however. I'd much rather make my project thread here on the main board. >Trashchan sounds good OK. Another 'yea'. >and I'll be sure to start keeping an eye on the board there now that it's being properly used again. You wouldn't need to watch over it particularly Greentext anon. I'll post links here when I think anything of importance/interest has happened. Thanks, Anon. :)

Chobitsu 05/25/2026 (Mon) 22:15:36 No.44630

>>44452 >I suppose I need to start a project thread until completion, to serve as an auxiliary one for the MaidCom thread? >>44453 >Yeah that would be nice >>44468 >I'll be sure to start keeping an eye on the board there now that it's being properly used again. Well, I still haven't started a thread yet but I've at least made time to assemble a shot of the basic gear components today: https://trashchan.xyz/robowaifu/thread/55.html#1522 I'd appreciate any questions or input on this image, so we can begin formulating a good thread OP. Cheers, Anons. :)

Edited last time by Chobitsu on 05/25/2026 (Mon) 23:09:08.

Robowaifu Technician 08/12/2026 (Wed) 13:12:12 No.45031

> (R&D -related : >>45030 )

Chobitsu 08/20/2026 (Thu) 01:56:46 No.45074

Cool video where a guy builds a sponsored IRL Tachikoma model. It's a nice effort (for 20+yrs ago). https://www.filemail.com/d/hekormwnjptxbuo

Edited last time by Chobitsu on 08/20/2026 (Thu) 09:22:17.

Robowaifu Technician 09/02/2026 (Wed) 03:39:24 No.45148

special tools that are also easily found https://www.youtube.com/watch?v=8B-yw9JuQUw

Chobitsu 10/13/2026 (Tue) 14:28:40 No.45580

Lol, I can't figure out where this should even go here so I guess this thread is the best compromise. www.rfcafe.com/index.htm Somewhat humorous, web 1.0, mostly electronics-ish -style magazine like thing. Not sure if it's even maintained today.

Edited last time by Chobitsu on 10/13/2026 (Tue) 18:04:32.

Mechnomancer 10/13/2026 (Tue) 22:53:30 No.45581

>>45074 Your link is broken, so here is a tachikoma from like 4 years ago (it is slow and derp but looks nice) on pootube https://www.youtube.com/watch?v=yGekn_74EHM

GreerTech 10/14/2026 (Wed) 13:08:37 No.45582

>>45581 It works if you copy it directly and make sure there is no l in html. Weird I know

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