What is Cycloidal Drive? Designing, 3D Printing and Testing
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3D model, parts list and more details ► howtomechatronics.com/how-it-...
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Parts list (check website article for full list, affiliate links):
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Bearing 6x13x5mm 686-2RS: amzn.to/3E4zZXf
Bearing 35x47x7 6807-2RS: amzn.to/3fATTgL
Steel rod 6x35mm: amzn.to/3FhqZ2I
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Bearing 6x13x5mm 686-2RS: alii.pub/66b1x0
Bearing 35x47x7 6807-2RS: alii.pub/66b1tw
Steel rod 6x35mm: alii.pub/66b1z5
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Clean design. Clear and instructive explanation. Evaluated the results of the work. Original Content. Material list included. 3D Model included. Perfect video honestly.
Glad you enjoyed it!
He’s a gem 💎
are they lighter or just more compact? than gears i meaan. can they be used for an ebike??
why the double layer of cycloid discs?
to reduce vibration, the eccentric shaft is basically an off center shaft and the cycloidal disc is moving more side to side than rotation movement, so they put 2 disc in opposite
side to cancel out the side to side meaning lower vibrations @@snorttroll4379
What a SPLENDID video showing such a brilliant design. I am a bit amazed at the accuracy you got from the 3D printer.
James Bruton used Cycloidal Drives in his most recent version of the robot dog. And I somehow doubt that it did not inspire you a little.
It's worth checking out
Thank you for reading my mind with this comment lol
That’s a very pleasant comment supported by solid arguments! I can feel it comes from someone who has watch many of the thousands of YT videos themed “let’s make a cycloïdal reducer”.🤦🏻♀️
Just another expression of wanting a Prusa XL.
This mechanism was my master's work during studying process, but yours is the best.
This is an absolutely beautiful design! Keep up the outstanding work!
Thank you very much!
1. You can draw parametric curve from 0 to 180 degrees, then connect it's start and end, extrude half of the cycloid, and then just mirror it and get full shape.
2. It's better to use SolidWorks variables. This way you can change cycloid's shape much easier.
3. Efficiency was measured incorrectly. Does this motor really produce rated torque? Input torque should have been measured before measuring output torque.
And it's also interesting how much torque will this reducer handle before something breaks. :)
Check out my favorite 3D printers, the K1 Max: amzn.to/3txQUC6 or if you are on a budget, the Ender-3 V3 SE: amzn.to/3FkCPus
I hope you enjoyed this video and learned something new! If you'd like to support me making more content like this, please consider supporting me on Patreon: www.patreon.com/howtomechatronics
hey guy, i see project is sand table, it’s beautiful and interesting, you can make do it??
Your channel is just amazing!! This deserved a scara pic and place with computer vision detecting objects!
This video can really add value to the other old industrial applications . Great work👍
Excellent as usual! I never expect anything less from your videos.
Thank you!
that was quite beautiful. elegant mechanics.
Great job! Thanks for sharing with us !
Gorgeous design. And brilliant explanation.
I've made two of Mechatronics projects, the Mars Rover and the Scara Robot Arm. These projects are great because they are well thought out and designed, with lots of photos and construction details. Looking forward now to make one of these drives to learn about it and maybe use it in a different Scara robot arm. Good stuff Dejan! Thanks for this.
In the first seconds of the video I thought the scene was a 3d rendering, so clean it is !!! until I saw your hand grabbing the device. Nice video and valuable content !
Thanks! 😀
Brilliant work and explanation!!!!
Awesome project! one of the best i've ever seen , Thanks for sharing, I really enjoyed it.
Glad you enjoyed it, cheers!
OMG Thank you so much for uploading this video
Now I understand how to drive it
Great explanation
Absolutely My Respect 👍🏼‼️
Amazing job, mate
Wow. Incredible.
neat ! great job explaining.
Wow! absolutely amazing project. Thanks for share your skills
My pleasure!
Beautiful work :)
Impressive piece of ingenuity ! Well done !
Thank you!
Hey all, just FYI, the equation as copied and pasted into SW had some issues. I copy and pasted it directly into SW2022 and it came up with something that looked more like a flower than a gear. After watching a video on Stepbystep-robotics channel I was able to figure it out. He had done some intermediate calcs on a couple of the terms and then replaced those terms in the equation and removed the associated parentheses that are no longer needed. This solved the problem. Also, in SW you can use the equation editor to lay out your terms and then put the equation into the sketch using the terms with, with " around each term. This makes your disk editable without having to re-copy/paste the equation in.
I'm an electrical engineer brought here by a chance, however I do have certain appreciation of the mechanical engineering.
I am able to judge that this video presents an extensive engineering effort, showing itself both overall and in the details.
I wish I could work with you on my energy conversion related projects (quite a lot of mechanical engineering is required there), or that my mech. engineers could represent at least a half of your ability and attitude to the subject.
It’s very cool!
Good video! Bravo, brate! :)
Beautifully done project! A transparent cover would be cool for showing what’s happening inside and dust protection.
Thanks!
About the shaft :
when screwing pla parts together, I avoid using purely undersized holes : there will be a lot of friction wich will generate heat when screwing, risking to damage the part.
a common option is to use threaded inserts, but they are expensive and not always usable (tiny space for a screw, for example)
personally, for 3mm screws (just for reference, my engineering project uses non less than 41 m3 screws all holes made with the following method) : a 2.3-2.4mm hole in the 3d model, that hole is re-drilled with a 2.5mm bit (inner diameter of M3, M5 is 4.2, for reference) with a cordless drill at slow speed to avoid melting the PLA, the hole gets a perpendicular exit (through part hole / I had in the model an other hole perpendicular at the end of the screw's hole) to make an exit for the debris, lastly the hole is slowly hand-threaded with a M3 tap and tap holder with a 2 turns down, half turn up, movement, to limit friction and let debris go down to the exit. If the hole is deeper than 15mm, I firstly do a 10mm pass, remove the tap and clear debris with a straightened paperclip, to much debris will make a lot of friction, heating up the pla and ruining the thread, so go slowly.
Uses and personal recommendations :
Fixing a pcb : a m3, 6mm long thread is enough.
Fixing plastic parts together : a 10-15mm long thread is enough
Great explanation and great video.
Thank you! Your channel is quite inspiring too!
Cheers
Beautiful!
Respect man. it's good job.
Cool project!
Wow this is a superb video. Subscribed & liked. Thank you!
Thanks!
Превосходно проделанная работа 👍🏻
That is dang cool great video
Awesome bro.
Thanks!
Ото мені чудо,хвильовий редуктор.
I actually used your version with the 3mm shafts as it didn't cause failure and was preferably lighter.
Very good
very cool!
Great job!
Thank you! Cheers!
I Love this video.
Great video! I’m curious what efficiency did you calculate? In/Out Power efficiency?
nice work
Incredible
Great video on cycloidal drives ⚙
Glad to hear it, thank you!
love it
Wow the Design.❤️🇱🇰
very good animation
It thought it was a digital model, then you touched it and started interacting with it my mind melted for a second
hehe 😀
Very interesting video on how to make our own cycloid motor at home, thanks for sharing with us !
On a 3D printer, the horizontal hole extension option is always problematic. I have tested it on many parts on my calibrated X1 sidewinder printer under ideamaker and this is not very accurate and repeatable, the outer parts are ok but the hole diameters are often oblong and always vary from clone to clone. First price 3D printer are good for POC but not suitable for a precision DIY part that must last. I hope that one day "How to mechatronics" will build a mini EDM machine with wire/electrode and/or a sls printer to allow home user to make complex and precise shapes in metal. I am pretty sur that most of us will be happy to sponsort him in order to product this kind of tools in opensource.
Yeah, the hole expansion option doesn't solve all problems.
Thanks for the input and the suggestion. I will take it into consideration.
Cheers!
Amazing work sir. Please also work on DIY QUADRAPED robot.
these things love and i mean LOVE being submerged in lubricant oil !!! in huge tractors they are always full of lubricate oil and they basically never fail .... tractors put them on final drives becoz of there robustness ... only seals and oil leaks but the mechanism hardly fails
Beautiful my friend ❤️👍😍✨
Excellent video.
Thank you very much!
A sumitomo gearbox is the first thing I thought of when i seen this!! Try tearing one of those down to replace bearings!!
Great!
Thanks!
amazing! bro
fantastic
Very good cycloidal drive to do cycloidal things.
This is nice
10:40
SPACERS!
Congrats! Long way to come out with this, wasn't it? 3D printing and SW is like playing to be God!
Can you recommend one or a substitute that will last decades?
AvE has a great teardown of one of these amazing devices.
AvE is a hack.
@@jamescrud this may be true, but he is also very knowledgeable when it comes to mechanical and electrical components of tools.
@@onradioactivewaves Well he''s very good at giving that impression.
Amazing
Thank you! Cheers!
My cycloidal gears want to slip off of their central as the tolerance wasn't made too tight. What do you think I should do to remedy this situation? Should I reprint the gears with a tighter tollerance to force it on the bearing and reconstruct the eccentric shaft or should I just super glue the bearing to the gear on the inside? I wonder if they eventually just do this from wear over time too
Good explanation. Thank you! Who invented this cycloidal? crazy!!
Greatly explained! And shown details are also very comprehensive. Is the output speed very uniform or did you recognize any unsteadyness. So you recommend these published formulas?
Would this be a good replacement for a Harmonic drive?
Excellent work and video ! Congrats
One question if I may : what are the advantages & drawbacks of a cycloidal drive vs a strain wave gear (harmonic drive) ?
Cycloidal Drives have high load capacity advantages and high torque density, but come with higher friction and limited speed.
Great....!!...Saludosss
are these suitable for ebike motors?
Great video with intuitive and inspiring design. Would you like to specify which bearing to choose where the crank shaft contacts with the cycloidal disks? I do wonder rollers or balls might serve the role better)
Great ♥
I think the reason why cycodial drives are not used more widely in industry is the much higher friction in comparison to regular gearboxes.
@@NabtescoMotionControl It is less than 1 % in comparison to regular gear systems. Regular gear boxes are everywhere....cycloidal gearboxes are very limited in industry mostly used for robotics. "Widely used" is subjective. From cars over wind turbines to conveyor belts - all still use planetary or regular reduction gears. Even Tesla's Drive unit is a regular reduction gear. ;)
@@NabtescoMotionControl I think you are over reading my comment. I'm not saying they are not used. But in comparison to the amount of regular gear boxes they are literally a fraction in all industy. There has to be some reasons for that. Probably much more expensive to produce, more friction/heat, difficult to maintain etc.
Thank you for your helpful video. I was wondering if you could help me out with 2 questions. How did you calculate the thickness of the disc and also how did you decide on the number of output holes on the disc ? Your video was a great inspiration, I hope to build my own version very soon. Thanks again!
Glad it was helpful! I didn't put much time researching about those two parameters, so I chose them arbitrary.
you are a beast
If you want the outer housing (outer part to turn) and the pins that are used as the output to be kept in place, can you still use pins for the outside or do you have to have another cycloid?
After long time
Is it possible to put a third disk in to balance it even further like an inline 4 engine? I think there's still a longitudinal moment generated by the two disks not being on the same plane.
Good explonation.
does it work on high rpm 10-50 k rpm?
would a polygram of constant width also work when making the cycloid gear?
Its such a informative video, can we increase the speed by using cycloidal gearbox by reversing it. Is there any limitations for it..?
is there a way to design it to have little to no vibration?
Can you make a video on the 4 digit display module with TM1637 IC
Please
Please make a video on robotic arm 3d printer
Could you add a link to the paper with the equation pls?
Great
Can you pressurize it with hydraulic fluid….or compress gas
At 6:04 you said you can determine the ring diameter pitch using the number of rollers and their diameter. How? What is the formula for that?
one question:
if you have 12 bushings and the plates have 11 notches, why is the ration 11:1 and not 12:1 ?
each notch of the plates has to engage 12 times to get one revolution.
or am i misthinking the case?
Please make a rocket
Yes
You are right
hmm if the rotor is contacting the stator from the outside and have more teeth than the stator, does the drive go in reverse direction ?
Beautiful. By the way, what if the outer part is driven by a second motor. How does output speed changes?
It is an interesting design, but it seems to need a large number of parts compared to reduction gears or belts. Does it cost more to make, or less than comparable gear systems?