Consider assembly jigs as part of your build. Particularly for those "you need 4 hands" spots. A few extra holes or tabs to facilitate assembly jigs can remove hours of frustration. Sometimes. They don't need to be fancy. A spot for an screwdriver access hole, a little friction wedge or temporary screw to act as a spare hand will do.
just beautiful, i hope you will make some videos on the hardware and software implementations (drivers+code etc) i have a great interest in these things but i am a real beginner. I'm let down my my lack of knoledge on the hardwares/drivers. many thanks brilliant video.
Thanks a lot for the amazing videos, but could you make videos were you show us the process of design, ie you mechanical design on the CAD software, the reasoning behind choosing parts numbers, dimensions, and the way of approaching a mechanical problem. I think the videos might be long but it would be really interesting to watch. Thanks a lot and keep it on.
I start to consider building your robot arm myself once you finished the series on it. it looks very well engineered and I'm always lacking a third hand.
I see that thin wire and I imagine it slicing through the layers of FDM plastic. And I see those parallel black brackets and I imagine significant sideways flex, as there's no bracing prism. It'll be fun to see this under load and stop worrying :-)
Very interesting design specially with the differential cable mechanism. Can you please show how exactly are the cables arranged? There are no gear teeth in the wrist joint right? Then how is the differential mechanism achieved?
Great stuff as always. Worth every cent on Patreon Any reference materials you can recommend with designing robot arms? Kinematics, gears used, and electrical components like bldc motors, encoders and stuff
Thanks again for such an amazing vid !. You are a very smart and intelillent guy, mister. Thank you so much for sharing your projects with us. Can´t wait to see your next amazing video !. Cheers, John from Chile, South America.
Love these videos! Seeing the beautiful printed parts carefully integrated with off the shelf parts is very satisfying. So, how does one get such awesome printed parts?
Nice work, you've burned some hours into that joint. I started a quadrupled robot in CAD inspired on you're vids (and some papers MIT Boston dyb ect) . Keep it up!
When you have built two complete arms, installing the cables should become easier.😄 What's the thinking behind using cables and not a local servo in every joint? It seems like this could be easier to assemble and possibly more reliable.
Very impressive project! keenly following its development. i got one question, whats the benefit of differential joint vs the standard two stage joint and can it be used for the joints at the elbow and the shoulder? similar to the UC Berkeley Robotic arm (project Blue). i am guessing they are using similar differential joints through out.
Really incredible work! Though I am wondering, like some others, what the expected wear and accuracy consequences the cables+plastic will have? How often might the plastic bearings need to be replaced, bringing with them all the fun of re-running the cables? Regardless, yours is such an inspirational and amazing channel :) I've especially enjoyed watching your designs change with time as you experiment! Thanks so much!
So, if I understand this correctly, the main point of the design is to move motors much closer to the shoulder. Thus maximizing payload capability. Am I right?
Awesome work, I really enjoy your videos! I was wondering if you had to build this again, would you still go for the design using cables, or instead use 3d printed bevel gears like in your recent "Another 7-axis (7DoF) Brushless Robot Arm (part1, again)" video?
Thank you! Great question. The bevel gear design is way easier to assemble and to design. But the cable design works way better (very smooth motion, zero backlash).
Hey, i would recommend to search for "M2 M3 M4 M5 Female Thread Knurled Brass Threaded Insert Embedment Nut for 3D Printing Threaded Heat Set Inserts " on Aliexpress. It Would a lot simplify your designs and enhance look of your robot parts.
AMAZING PRECISION. Very well made parts. What 3D printer are using to make these parts ? Also, what filament are using to achieve that fine precision ? I look at your video's, I could not easily find that information. Your channel is very interesting. Thank you.
Nice, very interesting. I am also a fan of "IRIM Lab Koreatech" on youtube. They have very advanced cable driven arms, fingers etc. Maybe interesting for you also. best regards
Very cool design, really enjoying your videos. Where do you purchase most of your bearings? Have you come to the conclusion that a belts/cables are the way to go for reduced backlash at a lower price point? or are you doing it too reduce weight at the farther joints?
This is really impressive. Do you work in the robotics industry? Or is this a hobby? How long do you think it took you to come up with this wrist joint design?
Excellent work! I have two questions. 1: The plastic pulley that is driven by the toothed belt and where the wire is wound up, will it hold for the shearing forces of the wire when applying a load? 2: When the wire is wounded up on the pulley, I imagine that it will do so in more than one layer. How do you cope for the difference in wire length when it winds a second layer?
These are rally excellent questions! 1: I would like to make the pulleys for the cable out of aluminum in the future. But for prototyping the plastics pulleys are ok. 2: The cable (wire) wounds always in one layer. I was very careful to make enough room for the cable to be wound only in one layer. And it works perfectly. Even when I move the output pulley super fast (as fast as I can by hand) the cable always wounds perfectly in the single layer. Check the video from my instagram: instagram.com/p/B2V12cfjBER/ . This is from another (secret) project. This video shows how perfectly wounds cable, even when I do it super fast.
papalevies the motors he’s using can’t create enough pressure to force the line through the PETG. As far as cutting through the plastic the parts might wear over time but as long as they’re rotating with the lines the friction alone shouldn’t be enough to cause serious damage. Maintaining tension is the bigger issue. Depending on infil and printing orientation there could be weak spots that could pit causing a loss of accuracy until the lines are manual recalibrated.
![[#2024MAMA] G-DRAGON - 무제(Untitled, 2014)+POWER+HOME SWEET HOME+뱅뱅뱅+FANTASTIC BABY | Mnet 241123 방송](http://i.ytimg.com/vi/Ox29z5Nf1Uk/mqdefault.jpg)
Do not hesitate to leave the comments! This will help to promote this video in the RUclips algorithm!
Hey man, sorry to ask but do you have the plans or stl parts for this arm?
nice wrist ...could this be bigger for shoulder
muito TOP! sou brasileiro e não perco um vídeo do canal!... congratulations !!!
Very cool! I'm brazilian and I don't miss a video from the channel!
Brilliant engineering with differential
Thank you!
This looks almost like CoreXY setup of the 3D printers, same idea ;)
This is absolutely wonderful
Thank you!
the differential explanation really helped me understand how the pulleys worked for the 2 DOF
Amazing! Can you suggest me some tutorials or some resources where I can learn to design like this?
Here, here and here. This goes here. And this here, here and here.
Another BRILLIANT Robot arm in the making
Woot woot! Sunday skyentific and chill
👍
Consider assembly jigs as part of your build. Particularly for those "you need 4 hands" spots. A few extra holes or tabs to facilitate assembly jigs can remove hours of frustration. Sometimes. They don't need to be fancy. A spot for an screwdriver access hole, a little friction wedge or temporary screw to act as a spare hand will do.
I think this is a great idea. I will do this for next iteration.
This is great! Humanity needs more channels like this! Hello from Russia! 😋
just beautiful, i hope you will make some videos on the hardware and software implementations (drivers+code etc) i have a great interest in these things but i am a real beginner. I'm let down my my lack of knoledge on the hardwares/drivers. many thanks brilliant video.
im literally blown away by the design, its revolutionary mate. how you comes out with this kind of design?
All respect for your hard work and knowledge .
Thanks a lot for the amazing videos, but could you make videos were you show us the process of design, ie you mechanical design on the CAD software, the reasoning behind choosing parts numbers, dimensions, and the way of approaching a mechanical problem. I think the videos might be long but it would be really interesting to watch.
Thanks a lot and keep it on.
I start to consider building your robot arm myself once you finished the series on it. it looks very well engineered and I'm always lacking a third hand.
I see that thin wire and I imagine it slicing through the layers of FDM plastic.
And I see those parallel black brackets and I imagine significant sideways flex, as there's no bracing prism.
It'll be fun to see this under load and stop worrying :-)
Very interesting design specially with the differential cable mechanism. Can you please show how exactly are the cables arranged? There are no gear teeth in the wrist joint right? Then how is the differential mechanism achieved?
Very impressive design! Great precision in your assembly! I will be sharing these videos will my Robotics students...
I love your Videos!
:)
really nice part of the robot arm. It would be nice to see how the cables are exactly locatet on the arm and how they move.
Learn English well from your videos. Very good pronunciation ))) thank!
This arm is going to be amazing when finished. (It already is!)
Also, really smart to use diferential transmission for the wrist.
Thank you!
Fantastic work! Explanation is easy and detailed.
Thank you for your kind comment!
You are perfect in what you do, I am glad that I can support as patreon, have nice time to watch your tremendous progress, keep up Your good Work!
Great stuff as always. Worth every cent on Patreon
Any reference materials you can recommend with designing robot arms? Kinematics, gears used, and electrical components like bldc motors, encoders and stuff
Angela Sodemann has a youtube channel that teaches you robotics, (Denavit-Hartenberg, FK, IK, ...) you should definitly check it out.
Waiting for a new parts. Well done mate.
Wow, how wonderfully intricate. I'm sure it has great value just as something to hold and play with by hand. Thanks for sharing.
E l e g a n t!
Thank you!
@@Skyentific Agreed. Amazingly elegant!
Well done, best of luck for the next steps!
I aspire to one day design my cable routing as well as Skyentific! Great video as always.
So amazing, I am officially mind blown.
Thank you! And thank you for your comment!
Great design! Thanks
Nice. Any guidelines on design? Like can do a tutorial on designing a very simple arm?
Congratulations, this is my favorite channel
Your designs are amazing - so well thought out.
Pure genius
Thanks again for such an amazing vid !. You are a very smart and intelillent guy, mister. Thank you so much for sharing your projects with us.
Can´t wait to see your next amazing video !.
Cheers, John from Chile, South America.
Awesome!! My 2 servo shoulder system is pretty funny next to that haha
Again.. anotehr beautiful build. I can't to see it fully built.
Awesome ! Really great ingenuity ! Looking forward to see the next part.
Wow, that is cool. I love watching your videos
Каждый раз прям с удовольствием смотрю
Спасибо!
super quality work,! great robot!!!
Nice idea
Great video! I can’t wait to follow along 😁
What size are your bearings?
Love the colors and design. I'm curious on how you tensioned the cables? Can't wait to see more.
HI, very interesting work showing beauty of 3D printing! Do you plan to public the CAD and part list for this design?
Fantastic job. Keep it up
Your videos are so very educational 777robotarm
Excellent video, thank you!
Love these videos! Seeing the beautiful printed parts carefully integrated with off the shelf parts is very satisfying. So, how does one get such awesome printed parts?
Nice work, you've burned some hours into that joint. I started a quadrupled robot in CAD inspired on you're vids (and some papers MIT Boston dyb ect) . Keep it up!
Thank you. Looking very nice:)
Tactical comment to promote the channel.
Wow, bravo. This is a brilliant approach to axis 5&6. A++
How did you think of the idea?
Nicely done! I wonder, how durable this arm will end up compared to all-metal ones with similar construction.
clever joint
that was brilliant
Beautiful! thank you for share...
Hope next coming up!
Impressive design! Well done.
I am curious about where the weakest link (what would break/wear out first) of this assembly would be?
When you have built two complete arms, installing the cables should become easier.😄
What's the thinking behind using cables and not a local servo in every joint? It seems like this could be easier to assemble and possibly more reliable.
Great
hello dear friend, thanks for the video. very interesting. Please tell me why you are doing this, how do you want to use it later?
Good job!
The plans are okay ,if you are building it into a robot how will you implement code to control both axis simultaneously
It is very easy. To control one axis you do "motor1-motor2" and to control second axis you need "motor1+motor2".
Very impressive project! keenly following its development.
i got one question, whats the benefit of differential joint vs the standard two stage joint and can it be used for the joints at the elbow and the shoulder? similar to the UC Berkeley Robotic arm (project Blue). i am guessing they are using similar differential joints through out.
Super
Your prints are SUPER CLEAN! What kind of printer or service do you use? Is there a video where you talk about it?
Prusa MK3S is excellent printer!
Really incredible work! Though I am wondering, like some others, what the expected wear and accuracy consequences the cables+plastic will have? How often might the plastic bearings need to be replaced, bringing with them all the fun of re-running the cables? Regardless, yours is such an inspirational and amazing channel :) I've especially enjoyed watching your designs change with time as you experiment! Thanks so much!
So, if I understand this correctly, the main point of the design is to move motors much closer to the shoulder. Thus maximizing payload capability. Am I right?
Yup
or speed
Awesome work, I really enjoy your videos! I was wondering if you had to build this again, would you still go for the design using cables, or instead use 3d printed bevel gears like in your recent "Another 7-axis (7DoF) Brushless Robot Arm (part1, again)" video?
Thank you! Great question. The bevel gear design is way easier to assemble and to design. But the cable design works way better (very smooth motion, zero backlash).
Hey Skyentific, exelent video, where do you get your hands on thos large diameter bearings that you use in other videos?
Thanks sir,i'm looking for this system...
Where did you buy these cool bearings?
If the cable comes loose, how would you put tension on it?
Hey, i would recommend to search for "M2 M3 M4 M5 Female Thread Knurled Brass Threaded Insert Embedment Nut for 3D Printing Threaded Heat Set Inserts " on Aliexpress. It Would a lot simplify your designs and enhance look of your robot parts.
AMAZING PRECISION.
Very well made parts.
What 3D printer are using to make these parts ?
Also, what filament are using to achieve that fine precision ?
I look at your video's, I could not easily find that information.
Your channel is very interesting.
Thank you.
Nice, very interesting. I am also a fan of "IRIM Lab Koreatech" on youtube. They have very advanced cable driven arms, fingers etc. Maybe interesting for you also. best regards
Yes! I know them. They are doing very impressive job! I love the design of their arm.
i really like your stuff, specially your accent!
Very cool design, really enjoying your videos.
Where do you purchase most of your bearings?
Have you come to the conclusion that a belts/cables are the way to go for reduced backlash at a lower price point?
or are you doing it too reduce weight at the farther joints?
muy buen trabajo, me gusto mucho esa articulación, un saludo desde mi canal
This is really impressive. Do you work in the robotics industry? Or is this a hobby? How long do you think it took you to come up with this wrist joint design?
Excellent work! I have two questions.
1: The plastic pulley that is driven by the toothed belt and where the wire is wound up, will it hold for the shearing forces of the wire when applying a load?
2: When the wire is wounded up on the pulley, I imagine that it will do so in more than one layer. How do you cope for the difference in wire length when it winds a second layer?
These are rally excellent questions!
1: I would like to make the pulleys for the cable out of aluminum in the future. But for prototyping the plastics pulleys are ok.
2: The cable (wire) wounds always in one layer. I was very careful to make enough room for the cable to be wound only in one layer. And it works perfectly. Even when I move the output pulley super fast (as fast as I can by hand) the cable always wounds perfectly in the single layer.
Check the video from my instagram: instagram.com/p/B2V12cfjBER/ . This is from another (secret) project. This video shows how perfectly wounds cable, even when I do it super fast.
Nice
Prints look amazing, What material, printer and slicer? If you dont mind.
I cant seem to find the part 4
Muy bueno. Wonderful!!!
Super cool design! Do you have a plan for dealing with cable tension as the cable stretches?
This is a great question. I decided to see how it will run and how bad would be the cable stretching, and deal with it afterwards.
@@Skyentific Amazing! Thanks for the response. Will you make an update video? Very interested to see the results.
Keep up the inspiring work!!
Won't the cables cut through the plastic? Also won't it lower the arm's accuracy?
papalevies the motors he’s using can’t create enough pressure to force the line through the PETG. As far as cutting through the plastic the parts might wear over time but as long as they’re rotating with the lines the friction alone shouldn’t be enough to cause serious damage.
Maintaining tension is the bigger issue. Depending on infil and printing orientation there could be weak spots that could pit causing a loss of accuracy until the lines are manual recalibrated.
Nice videos, where do you buy your bearings?
so cool
Wow Cool..
Супер!
Can you let us know which cable type you used?
This is stainless steel cable, super flexible (7x16 wires), diameter is 0.75mm. With slight modifications, 1mm diameter should work too.
When you've finalized the arm, will you sell the pieces as a kit?
Схему обмотки струны не будете показывать ?
nice!
Excuse me, Sir. May I ask you which software do you use to design your amazing project? Because I see one easy way to assembly all these part :)
what kind of 3D printer do you use? because it looks very clean
He uses a prusa mk3