Androofroo
Androofroo
  • Видео 547
  • Просмотров 1 162 353
string pulley mechanics test
This is me in the studio testing out a mechanical robot arm what type of linkage with string pulley mechanics. Everything is 3D printed and I use steel wire and aluminum crimp beads. And sometimes the robot hurts me. #powderoflife #performanceart #mechanicalengineering
Просмотров: 2

Видео

String pulleys for robot arm mechanics update
Просмотров 81916 часов назад
Here I am showing off some updates to this perfectly decent, modular, robotic arm system with string pulley mechanics. All versions use the same principle, there are two opposing pulleys that are connected with 1/32 in stainless steel cable and aluminum crimp-beads. This work is part of a larger multi environmental framework called Powder Of Life. Check out the repo on GitHub for lots of downlo...
Buddy really hates it 😢
Просмотров 1421 час назад
Buddy really hates it 😢
A great cheap encoder -- the AS5600
Просмотров 56221 день назад
A great cheap encoder the AS5600
AI on Woodson v Grant and race in America
Просмотров 4921 день назад
AI on Woodson v Grant and race in America
magnetic absolute encoder AS5600 and a little knob
Просмотров 18721 день назад
magnetic absolute encoder AS5600 and a little knob
AI on Slavery and the Bible
Просмотров 16728 дней назад
AI on Slavery and the Bible
AI on Gay Marriage and the Bible
Просмотров 2928 дней назад
AI on Gay Marriage and the Bible
big crank Studio Test 3
Просмотров 1463 месяца назад
big crank Studio Test 3
big crank Studio Test 2
Просмотров 923 месяца назад
big crank Studio Test 2
big crank studio test 1
Просмотров 1303 месяца назад
big crank studio test 1
Doug is done for the day
Просмотров 464 месяца назад
Doug is done for the day
Building robust connections for your project
Просмотров 2429 месяцев назад
Building robust connections for your project
an automatic drawing created with a #buzzbot (not sped up)
Просмотров 7610 месяцев назад
an automatic drawing created with a #buzzbot (not sped up)
String pulleys for robot arm mechanics
Просмотров 7 тыс.10 месяцев назад
String pulleys for robot arm mechanics
Knob with polarized connector for robotics
Просмотров 10010 месяцев назад
Knob with polarized connector for robotics
Body shapes for drawing robots
Просмотров 8111 месяцев назад
Body shapes for drawing robots
BuzzBots: a simple robot toy you can print and build
Просмотров 1,8 тыс.11 месяцев назад
BuzzBots: a simple robot toy you can print and build
This 3D printer ASMR is not illegal (anymore)
Просмотров 1,2 тыс.11 месяцев назад
This 3D printer ASMR is not illegal (anymore)
Soldering headers on an Arduino Nano
Просмотров 2 тыс.11 месяцев назад
Soldering headers on an Arduino Nano
Voltage regulation with cheap buck converters for your robotics projects
Просмотров 455Год назад
Voltage regulation with cheap buck converters for your robotics projects
Ultrasonic vs IR sensors for proximity detection with Arduino servo motor robotics
Просмотров 775Год назад
Ultrasonic vs IR sensors for proximity detection with Arduino servo motor robotics
Sound of peeling printed snowflakes off of a 3D printer bed
Просмотров 1,7 тыс.Год назад
Sound of peeling printed snowflakes off of a 3D printer bed
Sounds of a 3D printer printing 3D printed snowflakes
Просмотров 2,1 тыс.Год назад
Sounds of a 3D printer printing 3D printed snowflakes
Better jumper wires for breadboard electronics
Просмотров 4,2 тыс.Год назад
Better jumper wires for breadboard electronics
Can ChatGPT fall in love with me?
Просмотров 1,3 тыс.Год назад
Can ChatGPT fall in love with me?
How to connect wires and components without solder
Просмотров 3,6 тыс.Год назад
How to connect wires and components without solder
Upgrade your Arduino servo knob project!
Просмотров 1,3 тыс.Год назад
Upgrade your Arduino servo knob project!
Good Builds, Bad Builds: Reacting to Arduino servo knob projects
Просмотров 187Год назад
Good Builds, Bad Builds: Reacting to Arduino servo knob projects
Tourettic cyborg self portraits
Просмотров 28Год назад
Tourettic cyborg self portraits

Комментарии

  • @Gaaaaaame
    @Gaaaaaame 5 часов назад

    One of your main issues with your assembly is rigidity. Your improved tensioning system has assisted in this, but the material and shape of the arm itself is doing you few favors in that regard. The V3 pulley assembly itself is tall, but immediately connects to a significantly thinner arm section. While you get enhanced leverage, you also end up with an underbuilt arm connection for said leverage. Inherently speaking, the larger the arm, the more weight you sling around AND the larger moment of inertia, both working against you. Solutions: 1. optimize models -> cut weight on the arms and pulleys, lowering moment of inertia and weight to improve responsiveness, ease of control, and stability. 2. improve arm moment of area -> in the same way an I-beam gains efficiency per weight in terms of preventing bending, you can make your arm geometry more efficient for a specific axis, improving its efficacy in certain directions. Your rectangle setup works, but could be improved for additional effectiveness 3. supplement arm leverage -> Your arm segments are acted on by the small connector at the end of the pulley. To improve stability, consider extending that connector's length and rigidity. Additionally, you may consider using a wire assembly outside of your pulley to act as another method of rotation transfer, similar to what you have already, except arm segment to segment instead of assembly to assembly. I'm working on some files for you, but I need the following: 1. diameter of wire sheaths 2. length and diameter of your bolts (I use M4x6x6 threaded inserts and 12mm grub screws, for example) 3. pulley diameter 4. arm segment width and height 5. pulley connector dimensions (the part that slots into the next arm right at the end of your pulley) As of now, I have ideas for improved generic arms (similar in function to yours, with weight savings that hopefully lead to improved responsiveness and lower slop), as well as specialized arm geometry (larger footprint than your current ones, pick based on the arm section's purpose) for lifting type loads (alongside the pully direction, such as for when your arm goes up and down a lot or needs to move a heavy object), torquing loads (forces that do not line up with the pulley but instead try to twist the joint sideways, like if you extended your finger and then pushed against the side of your nail), and both (essentially just a larger arm segment with good geometric stability). Your pulley assembly is mostly fine, I have yet to investigate its internal wire pathing to see if sharp corners exist, but other than some weight savings you can add, the pulley seems alright. The fork is less than ideal for stability, but you lack good options without increasing the footprint significantly, and/or utilizing larger connections at the rotation points.

  • @PiefacePete46
    @PiefacePete46 5 часов назад

    Excellent! The improvement from the larger pulleys is obvious. Well... it is now you have so clearly demonstrated it! 👍 😜 How are you going to explain the bruising and lacerations on the hospital A&E admission form? 🥴 Looking forward to future iterations... Like & Subscribed.

    • @androofroo
      @androofroo 5 часов назад

      @@PiefacePete46 Thanks! I'm hoping it never does 🤞, but if the inevitable hospital visit does arrive I will know I brought it on myself 😅

    • @PiefacePete46
      @PiefacePete46 4 часа назад

      @@androofroo : Or the "Ghost in the Machine"? 😱

  • @that_guy8893
    @that_guy8893 День назад

    Thank you.

    • @androofroo
      @androofroo День назад

      @@that_guy8893 happy to share

  • @Alxhadi
    @Alxhadi День назад

    great job. cheers from Saudi Arabia.

    • @androofroo
      @androofroo День назад

      @@Alxhadi Thanks! Cheers back at ya

  • @Gaaaaaame
    @Gaaaaaame 2 дня назад

    Here to see your most up-to-date progress on this. If you wish for a use case, I'd suggest looking into ways to transfer human scale movement into smaller scales. If you have a miniature arm with a gripper, for instance, then a full scale one that you wear, so long as you do not twist your arm too much, you can significantly increase the precision of your movements. This can have benefits when drawing (replace gripper with pen), precision assembly, etc. Just be sure to make the pulley ratio the same (else your 90 degree arm rotation could transfer to multiple full rotations on smaller pulleys at the other end). If you scale things down, consider using a bolt with fishing wire wrapped around it, simply wrap the excess slack around a small bolt and screw it down, that will remove the tension and secure the wire. I have not looked into its creep factor, however, which may be a concern.

    • @androofroo
      @androofroo День назад

      @@Gaaaaaame I love this suggestion, it reminds me of something MC Escher writes about in terms of the limitations of our own precision ( he built a stack of magnifying lenses to enhance his precision at tiny scales for woodcuts so now I am picturing Escher with a robotic arm).... also, LOL... everyone else wants me to go the other direction and build a mech

    • @Gaaaaaame
      @Gaaaaaame День назад

      @androofroo mechs are overrated (source: insufficient funding to produce my own at the current time) Jokes aside, string mechanisms are one of the more effective ways to assist body motion on an exoskeleton, lightweight and low cost. People have been itching for it online for a while now, as "true" mechs are immensely difficult to design due to control (how do you follow body movements properly), weight, cost, and sources of control (good luck matching muscle strands on the body in terms of mobility options, this is why mechs are stiff compared to humans). Making a puppeted mech is doable, but unlikely to work if free to move due to the significant wire connections, limited movement options, and lack of feedback for the operator.

    • @Gaaaaaame
      @Gaaaaaame День назад

      Also worth noting that the piezoelectric market is steadily growing, I wrote a paper on it last year and it appears to be something worth looking into if you wish to assist human motion in the coming years. Their primary issue is heat dissipation and low relaxation speed if I recall correctly, perhaps best suited for situations already covered by hydraulics for heavy loads, though less likely to damage the user on failure and able to fit smaller form factors with less piping overhead.

    • @androofroo
      @androofroo 5 часов назад

      @@Gaaaaaame 🙌 my thoughts every time I hear the request

  • @Gaaaaaame
    @Gaaaaaame 3 дня назад

    Something to note: you do not appear to have any fillets in your parts. The pulleys especially suffer from this. Fillet the ends for what amounts to free additional durability, as those sharp angles are going to lead to stress concentrations. Also, your wire force appears to go mostly into the channel walls or into the tensioning area, this will lead to rapid wear and induce failure under high loads, as the majority of your pulley surface is not utilized, also having sharp turns in your wire where they transfer forces inside that pulley will lead to fatigue. Instead of this, try to get friction across the wire length, such as perhaps with an outer disc on your pulley that can have its radius reduced. Also consider using a helical structure instead of a flat pulley, though be warned that shrinking this structure is easy (and works well due to exponential friction with multiple windings on the pulley), but will cause rapid fatigue of steel wire if the radius is too small, be sure to not go below the minimum pulley radius for your wire diameter, and consider using string with a low stretch factor instead to shrink your transfer pulley as the wire is not the limiting strength factor in your design. Edit: upon reading another comment, you mentioned that shrinking your pulley makes the tension mechanism hard to fit. Consider raising the height of your pulley with a second portion that you can rotate independent of the first. This "upper" portion of the pulley will be able to hold the wire ends. You can attach the wires, then twist the upper portion and glue to the main pulley, holding the tension. I find that hot glue on PETG works well, use some glue channels on the tension pulley for a flush fit.

    • @androofroo
      @androofroo 2 дня назад

      @@Gaaaaaame wow a lot of good info here. Thanks for the comprehensive notes -- good for future reference 👍 And yeah this is a constant problem in building the various components in this larger framework github.com/andrewfrueh/PowderOfLife ... getting into so many domains simultaneously always seems to carry the risk that I'm missing critical domain specific information, so thanks again.

    • @androofroo
      @androofroo 2 дня назад

      @@Gaaaaaame also, do you have any recommendations for good low stretch string or cord? I've tried waxed polyester but I have a hard time finding something that has the power transfer of Steel cable. I'd love a recommendation

    • @Gaaaaaame
      @Gaaaaaame 2 дня назад

      ​@androofroo i know of one but forgot its name. Ill attempt to find the name of it, keep in mind that it is not the easiest to find unless you are in europe based on what i have heard, but it is still attainable in the US. Ill check out your github, links are often scrubbed from comments on youtube, so if you have an email address that isn't listed on your channel, providing me with one here will allow me to throw some part files your way. Also do tell me what file types you can open, as i operate using sldprt but can export to several others.

    • @Gaaaaaame
      @Gaaaaaame 2 дня назад

      Rope notes: Paracord creep factor is high "DM20" (which I believe stands for Dyneema m20) has extremely good creep factor but is hard to find outside of Europe Vectran is not terrible but weakens and loosens over time.

  • @Gaaaaaame
    @Gaaaaaame 3 дня назад

    You have action at a distance, now throw a ghost on the end for *spooky* action at a distance.

  • @freeee35
    @freeee35 4 дня назад

    Exhaustion from Fighting the fickle finger of fate ? ❤

  • @freeee35
    @freeee35 4 дня назад

    Dystopian-esque

  • @RadSlayer-
    @RadSlayer- 4 дня назад

    I’m not dirty minded, I’m not dirty minded, I am dirty minded 😭

  • @TheConsheehanacdc1
    @TheConsheehanacdc1 4 дня назад

    Art hmmmm na mental illness mm yea

    • @androofroo
      @androofroo 4 дня назад

      illness ❎️ ... disability ✅️

  • @egWyte
    @egWyte 4 дня назад

    pure retardium

  • @louisnicolasthibault8330
    @louisnicolasthibault8330 5 дней назад

    Wtf!😂

  • @freeee35
    @freeee35 5 дней назад

    Controlling chaos… fight on. 💪

  • @gazorbpazorbian
    @gazorbpazorbian 5 дней назад

    holy effin shhhh! what an amazing video! keep 'em coming! just discovered your channel and I love it!

    • @androofroo
      @androofroo 5 дней назад

      m(_ _)m ... and many thanks! I'm starting to find my legs with shooting things like this, and I actually kind of hate being on camera, so I really appreciate the encouragement

    • @gazorbpazorbian
      @gazorbpazorbian 5 дней назад

      @@androofroo keep on doing it! It's really awesome seeing this mechanism! And the evaluation you did and everything! Would love to see you tackle some big project like a rover or robot. And you look good on camera too, don't be shy

    • @androofroo
      @androofroo 5 дней назад

      @@gazorbpazorbian 😁

  • @freeee35
    @freeee35 5 дней назад

    Always striving ❤

  • @freeee35
    @freeee35 5 дней назад

    👏👏👏❤️

  • @preppertechnicianee6013
    @preppertechnicianee6013 5 дней назад

    Ok cool but I think you can offset that with smaller pullies in more of cherry block system You might also line the rolling joints video Rolling contact joints Rolling joint gives different kind of vid lol

    • @androofroo
      @androofroo 5 дней назад

      Yeah it would be interesting to have a block with multiple pulleys and yeah of course that would help with mechanical advantage for sure but the extra complexity makes me wince a little so I think I'll stick with the single pulleys for now. Also, yeah I searched rolling joint system... 😂

    • @preppertechnicianee6013
      @preppertechnicianee6013 5 дней назад

      @ that was my thought as well I was considering trying and was like nope pain in the butt When I was doing this I made module That could use to interface with other things

    • @androofroo
      @androofroo 4 дня назад

      @@preppertechnicianee6013 indeed modular component architecture is the best

  • @freeee35
    @freeee35 5 дней назад

    Shadow play❤

  • @declanb6985
    @declanb6985 6 дней назад

    I would be curious if bicycle shifting cable housing could work even better? The shifting housing has an inner lined tube for low friction and then the outer wall has small, stiff wires embeded in it running the length. The shifter housings are very stiff as opposed to brake cable housing which are made to squish down a bit to reduce the bite of the brakes. Bought in bulk, I wonder if the cable housing could be cost-effective too? Neat project! And it's fun to see the evolution of it!

    • @androofroo
      @androofroo 5 дней назад

      Thanks for that suggestion! Yeah I really need to look into bike parts as I'm sure they have much tougher tubing I could leverage. I just happen to do a lot of 3D printing and Fabrication so PTFE was my go-to LOL. Thanks for the note (*^ω^)ノ

    • @declanb6985
      @declanb6985 5 дней назад

      @androofroo of course!

  • @wurstelei1356
    @wurstelei1356 7 дней назад

    Super nice project, thumbs up and keep us on par.

    • @androofroo
      @androofroo 6 дней назад

      Thanks for the note I'm enjoying the process

  • @DanielSimu
    @DanielSimu 7 дней назад

    This is amazing! That seems to work really well. Shame that human arms have so many degrees of freedom, I kinda wanna see (or make if I had the time) one that could copy a human shoulder+elbow+wrist and do some juggling exercises..!

    • @androofroo
      @androofroo 7 дней назад

      Thanks for that! and yeah I'm with you I would love to do a full body manually powered mech 🤘... I'm sure at some point there's diminishing returns with this system... so maybe not that, but it is going to keep getting more complex.

    • @androofroo
      @androofroo 7 дней назад

      @@DanielSimu plus I checked out your channel... of course you would suggest juggling LOL

    • @DanielSimu
      @DanielSimu 6 дней назад

      @@androofroo Yeah, every joint adds a bit of slop and play.. but 6 axis may be achievable, if your system is modular?

    • @androofroo
      @androofroo 6 дней назад

      @@DanielSimu indeed it is. In fact it's part of a larger framework which is entirely modular including the software components... it's grown so quickly it's kind of a hot mess actually so half my work is clean up

    • @soggy6645
      @soggy6645 5 дней назад

      this could be nested inside a CV joint to add axial rotation maybe?

  • @freeee35
    @freeee35 7 дней назад

    Seeker. ❤

  • @freeee35
    @freeee35 7 дней назад

    Cool description and demonstration ❤️

  • @freeee35
    @freeee35 7 дней назад

    Stranger in a strange land ❤

  • @Woodcrafts59
    @Woodcrafts59 7 дней назад

    He's going to trip get hurt

    • @androofroo
      @androofroo 7 дней назад

      @@Woodcrafts59 I'll try not to 😉

  • @freeee35
    @freeee35 8 дней назад

    And the fight goes on❤

  • @freeee35
    @freeee35 8 дней назад

    Reaching for freedom? Or just contemplation.❤

  • @freeee35
    @freeee35 8 дней назад

    Onward and upward💪

  • @freeee35
    @freeee35 10 дней назад

    Fighting the good fight💪❤️

  • @freeee35
    @freeee35 10 дней назад

    Facing danger bravely 👏💪

    • @MrRight...
      @MrRight... 9 дней назад

      Tf are u talking about?

  • @bobdole8830
    @bobdole8830 10 дней назад

    Art lies in the eyes of the beholder, but sometimes there's just nothing to see.

  • @Newelllifeoutdoors
    @Newelllifeoutdoors 10 дней назад

    That looks like something else

  • @freeee35
    @freeee35 11 дней назад

    Keep fighting the good fight💪🤜💥

  • @flickyyyz
    @flickyyyz 11 дней назад

    what?...

  • @freeee35
    @freeee35 12 дней назад

    He’s baaaaack 😮

  • @BakerZone760
    @BakerZone760 13 дней назад

    Wtf 😂

  • @TannerFrisby
    @TannerFrisby 15 дней назад

    I found your video while trying to figure out why the default analog output mode wasn't giving me an output. Pulling gpo high sorted me out. Thanks.

    • @androofroo
      @androofroo 15 дней назад

      Sure thing. Glad it helped!

  • @jamescoffey4891
    @jamescoffey4891 16 дней назад

    ....effective but,not strong enough..!

    • @androofroo
      @androofroo 16 дней назад

      Agreed.... I'll be happy when it can break my arm

  • @Shogunyancoill
    @Shogunyancoill 16 дней назад

    bro this is the guy that’ll make the pacific rim jaegers, I can feel it

  • @ReadDaGospel
    @ReadDaGospel 17 дней назад

    This thing lies alot. Proof a.i is not objective.

    • @androofroo
      @androofroo 17 дней назад

      Word! AI hallucinates constantly and is not aware that it has made any errors. Zero self-awareness

    • @ReadDaGospel
      @ReadDaGospel 17 дней назад

      @ First of all the a.I dismissed any explanation of the verses completely. Then tried to run to other verses to disprove the truth. Then the a.i completely lied by saying paul didnt mention homosexuality. When not only did he invent a word for it. He also mentioned lesbians verbatim. I saw through the deception easy. Nice try again maybe you will get it right

    • @androofroo
      @androofroo 16 дней назад

      @ReadDaGospel interesting, I did not realize there were mentions of it in the New Testament. And indeed, you cannot trust AI output and you certainly cannot expect to reason with it as it hallucinates to readily and is not aware when it does so

    • @ReadDaGospel
      @ReadDaGospel 16 дней назад

      @ 1 Timothy 1:10,romans 1:26-27,1 Corinthians 6:9-10. All the bible is clear any sex i repeat any SEXUAL ACT OUTSIDE OF MARRIAGE IS A GRAVE SIN. Marriage according to the bible and God is a union between a man and a woman. So yes the New Testament talks about it.

  • @ReadDaGospel
    @ReadDaGospel 17 дней назад

    This is pure garbage 😂

    • @androofroo
      @androofroo 17 дней назад

      @@ReadDaGospel garbage in, garbage out

    • @ReadDaGospel
      @ReadDaGospel 17 дней назад

      @@androofroo right thats why this video will die in RUclips hell

  • @LogicMathh
    @LogicMathh 17 дней назад

    thnx

  • @freeee35
    @freeee35 17 дней назад

    Impressive🤜💥🤛

  • @freeee35
    @freeee35 18 дней назад

    Workin’ 👏

  • @DIRKYDIGGLER
    @DIRKYDIGGLER 18 дней назад

    gloves.

  • @freeee35
    @freeee35 19 дней назад

    Still ….. ewwww🥴

  • @freeee35
    @freeee35 19 дней назад

    🤜💥🤛 always the inventor👏💕

  • @jimsvideos7201
    @jimsvideos7201 20 дней назад

    Cue inevitable “encoder knows where it is because it knows where it isn’t” gag.

  • @freeee35
    @freeee35 20 дней назад

    😮❤✅