CNC Machined vs 3D Printed Cycloidal Drive

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Parts list (check website article for full list, affiliate links):
Amazon.com:
6mm Steel Cylinder Rod: amzn.to/3POEqfr
8mm Bushings : amzn.to/3Jnbk4x
Bearing 35x47x7 6807-2RS: amzn.to/3fATTgL
AliExpress:
6mm Steel Cylinder Rod: alii.pub/6f4xwg
8mm Bushings: alii.pub/6f4vt7
Bearing 35x47x7 6807-2RS: alii.pub/66b1tw
In this video, we will take a look at my new updated version of the cycloidal drive that I made in the previous video, with 19:1 reduction ratio and see how it performs made with CNC machined parts versus made with 3D printed parts.
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31 июл 2022

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Комментарии : 284

@HowToMechatronics Год назад

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

@kaiseraugustus1393 Год назад

@How To Mechatronics: Hello, I want to buy the Solidworks for Makers and use your 20% discount, but unfortunatelly the link doesn't work for applying the discount - do you have a discount code, which I can use?

@HowToMechatronics Год назад

@@kaiseraugustus1393 Hey, please check the links in the description again, I've just updated them with the special 20% off discount offer.

@joeboxter3635 Год назад

Do you have a website with write up of this?

@schizotism3633 Год назад

@@HowToMechatronics Hi.. Are you available right now?

@MrSniker-gg3fg 11 месяцев назад

hey man i am expert in pcb designing so if you need my service i can work for you i need some work i do pcb designing multiple layers

@RandomCrap309 Год назад

Those parametric equations would've been a HUGE help to me and my design team a couple months ago XD. We were using a lengthier method to create some 3-D printed cycloidal disks for a robotics project. Glad to see this method though! Saving this video for future reference :)

@HowToMechatronics Год назад

Glad I could help!

@chadjensenster Год назад

I made a cycloidal for the gearboxes of a robot arm for my capstone mechanical engineering project. They are nice because it's easy to have the reducer on the robotic arm and it looks good too. Great video. Thanks for taking the time and presenting it.

@HowToMechatronics Год назад

Yeah, cycloidal drivers can be great choice for robotic arms builds.

@chrisnatale5901 Год назад

Going through the CAD design for a cycloidal drive was very helpful. Thanks!

@HowToMechatronics Год назад

Glad it was helpful! Cheers!

@eDRoaCH Год назад

this is a really interesting comparison. I wonder what the best of both worlds would be. If you just put the cnc cyclodial disks or maybe other parts in the 3d printed version I wonder if its power/weight ratio would beat out the other 2 alone

@hypnoticatrance 14 дней назад

This is the best Cycloidal Drive i saw, so far.

@m.sierra5258 Год назад

As both motors were skipping, I was really curious about the internal damage caused. Sad that you didn't show that. I'd love it even more if you would maybe replace the top with acrylic to see what's going on inside

@Flashbang_Photo Год назад

Skipping doesn't cause any damage, as is something steppers do exactly to avoid damage

@m.sierra5258 Год назад

@@Flashbang_Photo I don't think the stepper was skipping, I think the drive was skipping. The only experiment where the motor was skipping was with the small motor and the machined drive. The backlash was too large for the motor to be the one skipping in the other tests, imo

@superdau Год назад

@@m.sierra5258 If this drive skips, it is permanently broken (as most gear boxes are). The skipping was the stepper motor reaching its torque limit and losing steps. Btw. that's not something steppers do to avoid damage, it's just something that happens when the torque limit is reached (which is defined by the current to motors get, which in turn is set by the stepper driver).

@m.sierra5258 Год назад

@@superdau where does the max torque difference between the printed and machined box then come from? I don't see how the ratio would differ. Or is plastic just that much more lossy?

@_seriousrob_ Год назад

@@m.sierra5258 The plastic can't transfer all the torque to the stick. Some of the torque is lost due to the plastic giving up, as the damage at the end showed. Other materials than PLA might hold up better.

@IcanCwhatUsay Год назад

You should definitely do a video on how you've setup your printer. Your prints are great looking!

@HappyMathDad Год назад

I have been trying to make an almost 100% 3d printed planetary gear box with good efficiency. And I've already noticed a huge difference between gear generator softwares. I think that's how youtuber Paul gold got 30 Newton meters of torque out of a smaller stepper with a 3d printed cyclodial gear. Your measurements of a 1 to 3 decrease in performance Is significant. I would love if Paul measured the efficiency too. But beggars can't be choosers. Love the video!!!

@HowToMechatronics Год назад

Thanks for the input!

@dekutree64 Год назад

I tried SF1 bushings at one point too (and HK needle bearings before that), but nowadays I press PTFE tube into brass tube to make low-friction bushings whatever length I want and without any seam. Although it is fairly time consuming cutting and deburring a large number of tubes to precise length, even with a tubing cutter. And not all PTFE tubes are concentric, so it can be trouble finding a good supplier.

@PhantomBlank Год назад

A lathe may be ideal for that kind of precision cutting

@ToreDL87 5 месяцев назад

@@PhantomBlank Was gonna say that, get PTFE tubes with greater wall thickness, smaller ID bigger OD, machine, broach & sand to spec, so you get cheaper materials and greater accuracy, problem solved.

@soscilogical1904 Год назад

This is really good because it tells me that it's a really nice design and it's far to many components to be a low cost solution for a budget product, which is good info.

@stevebabiak6997 Год назад

The housings on these should have some sort of mounting flanges on them; clamping them as was done in this video shows that the housings themselves move up and down, implying that all forces aren’t being transferred to the load.

@2150dalek Год назад

Amazing mechanical design.... Thanks for the video !

@MukeshKumar-jw6ji Год назад

Nicely explained with a good project. 👍 I think CNC's product gives better results rather than printing machine. Printing machine's product are of PBC which are worne out at the rubbing areas and can malfunction due to clearance where as the CNC machine's product are of metal and by greasing it can give a better results in comparison to printing product.

@nullfi7148 Год назад

Cycloidal drives are super interesting, you should do this video format for a planetary gear drive build next. Keep going mate, great content and already subscribed : ]

@HowToMechatronics Год назад

Thank you and welcome!

@wenbodong5717 Год назад

"it's a precision drive" then "let's grind it with a dremel" JK lol. Great work man!

@HowToMechatronics Год назад

😁

@wrgates99 26 дней назад

I noticed a few times you had issues with the powder coating. You can specify that it should be to drawing dimensions after the coating is applied to avoid oversizing the part and keeping it to your tolerances in the drawing.

@doverivermedia3937 Год назад

Wow. I'm so glad I discovered your channel. Excellent resource and very insightful. Thank you ... 🇬🇧

@HowToMechatronics Год назад

Welcome!

@Tom_videa Год назад

I think it would also help to use sturdier material for 3D printed parts. I personally use polycarbonate for these high stress parts, as PLA is softer and it can wear quite easily.

@HowToMechatronics Год назад

Thanks for the input!

@dzitiatri Год назад

What head and bed temp you are using on polycarbonate ? I am just curious to buy and try PC too

@Tom_videa Год назад

@@dzitiatri I use default Prusaslicer values, it works really well.

@adamrak7560 11 месяцев назад

Try carbon fiber nylon too, if you can. And you could probably do well with carbon fiber PETG, it is amazingly stiff!

@kaptn_kapton 9 месяцев назад

I startet printing polycarbonate and it works very nice! I use 110°C bed and 290°C nozzle and a polycarbonate sheet as print plate.

@aldobruno712 Год назад

Many congratulations! how much was the cost of the CNC parts?

@DmytroVT Год назад

What is the cost of all CNC parts?

@AnthonyvanHamond Год назад

the fact he didn't disclose it in the video says enough :-) (he's sponsored. if he was not, it would have been extremely costly :-) )

@HX2003 Год назад

I paid around 60 usd to make a single shaft coupling approx 50*50*25mm with them. I have yet to receive it though, I hope it will fit otherwise it would money wasted.

@marcus_w0 Год назад

At this part count, I would guess around $600 to $1000 US.

@eatonasher3398 Год назад

I'd say around 1500-2000usd (source: I'm a prototype machinist) The undercut of the main housing and the two flats on the eccentric shaft adapter add complexity to it. If you wanted the gears to be high precision then I'd recommend using 4140 prehard (versus jig grinding, which would be more accurate but much more expensive), not stainless steel. That way you could also use better/harder bushings (drill bushings) which would increase performance significantly without increasing cost significantly. Fill it up with some sticky grease and boom!

@jimmym2719 Год назад

Ya, custom CNC is expensive. Unless u have your own.

@khroomlet8821 Год назад

Beautiful motor! I've been looking for something for a DIY coffee grinder. How much did the metal motor cost from PCBWay?

@Niels_tenDam Год назад

U can use 3MF file format instead of STL. It can store more info with smaller size.

@Sam-dv3vt Год назад

worth waiting for your new video

@jimmym2719 Год назад

Fine job , thanks bro for sharing the details info 💕

@Alfaduk Год назад

These cycloidal drive reduction drives are very interesting. I wonder about their capacity work at increasing motor speed. Essentially driving the unit from the output shaft, to increase the drive of the input shaft. An example would be a centrifugal supercharger where the input shaft might be driven to say 6000rpm, but the output might need to be 100,000rpm.

@dragasan Год назад

I learned a lot - thank you! (And I love Solidworks)

@HowToMechatronics Год назад

Glad it was helpful!

@CleonanTehGnome Год назад

Can you characterize the thermal differences with extended use?

@christianedelmann6880 Год назад

I used to work at a company that made those kinds of planar polymer bearing/bushings and they are almost exclusively made to be pressfit into a tight fit bore. Maybe a design iteration would be to get a ground thin walled tube and pressfit the bushes into them. Also those kinds of contact surfaces should be hardened and ground to a fine surface finish. Obviously not super easy to do but better gearbox life

@jBurn_ Год назад

first thing i noticed. Those bushings are not designed for his use. The "oversized" measurement is as it should be to have a tight fit. Even the inner diameter is too lose as long as they are not pressed into a bore. You can see it at 12:01 with your bare eye, that the bushings have radial play on the shafts...

@HowToMechatronics Год назад

Thanks for the input. Yeah I realized that a bit late, and also they ware easily available.

@cirdiam1800 Год назад

Very good - thanks for making and sharing the video.

@HowToMechatronics Год назад

Glad you enjoyed it!

@pgjuzek Год назад

awesome build

@rameshkp7860 Год назад

Hi, You are great to teach about CNC. Congratulations.

@vilsonandrade8191 Год назад

Very nice project Congrats from 🇧🇷🇧🇷🇧🇷

@johnmcnamara3719 Год назад

Fantastic effort I love it! :)

@HowToMechatronics Год назад

Thank you! Cheers!

@russell.w1452 Год назад

Great video ❤️… i have a question, how did you make that animation of the object splitting in many piece at timesstamp 0:47

@felixslothower6180 Год назад

Very cool project, always fun to assemble your own cnc'd parts!

@oliverer3 Год назад

I made the original 3d printed version of this a while ago and it served me well but it was an utter pain in the ass to assemble.

@sceiluug Год назад

i am wondering of there is also a reduction in noise in between them

@johnathonwalty8915 4 месяца назад

Great video. Nice testing experiments. 👍

@zhuzhoubettertungstencarbi7424 3 месяца назад

Love watching it!

@thomasmackay4 Год назад

Regarding modeling technique; is there a reason why not a 0 to 2pi/(number lobes) and a radial symmetry by number of lobes? is that to avoid surface modeling lines? coming from a Catia V5 modeling experience. gap with a spline just irks me and probably is creating some odd tribology down stream.

@DestructoXxShaunxX Год назад

I like how you say "distance ring", as opposed to "SPACER!!" @IvanMiranda

@ddegn Год назад

How To Mechatronics should be fined each time he missed an opportunity to say *SPACER.* It was still a great video even though there wasn't enough SPACERs in it.

@arkadyaminev Год назад

Помню этот редуктор ещё по советским альбомам редукторов, но только теперь понял как он работает.

@steve_jabz Год назад

Does the model currently up have the clearance built in you were talking about?

@ryanmckenna2047 9 месяцев назад

Could you do this with strain wave gear / harmonic drive?

@sergiofurini6127 Год назад

as always very very interesting! thanks for sharing

@HowToMechatronics Год назад

Glad you enjoyed it!

@gordonpromish9218 Год назад

does the 15% loss in output occurs as sound, vibration, and heating? if so, where in the mechanism is most of the loss occurring? to improve efficiency or at least to improve durability at speed under load, what kind of mitigation would be beneficial? Would cooling be necessary during prolonged use?

@iforce2d Год назад

I'm amazed the wood beam didn't slip of the scale and smash into your knuckles

@HowToMechatronics Год назад

haha I've never thought about it. I guess it's all about experience. 😀

@TheInsaneupsdriver Год назад

you could add 2 more disks thinner and lighter at a 90 degree angle to the others for a superior longer lasting one.

@dragansolarov7875 Год назад

because it has low/zero backlash this type of mechanism probably can be used for star-trackers and guiders too.

@WATTWENEED 24 дня назад

Yeah installing bearings with a hammer might not initially show failure but the little dents caused in the raceways will wear the bearing out quickly

@eirikkalstad6007 Год назад

Very educational video!

@raymondvaage2300 10 месяцев назад

Was it expensive to get those parts manufactured by PCBWay ?

@superdau Год назад

I wold really like to see a comparison with a planetary gear of the same reduction (probably needs to be 2-stage). At the same outside dimensions a planetary gear would be a beast.

@HowToMechatronics Год назад

Yeah, that would be an interesting comparison. I might make one. Cheers!

@enott Год назад

You are mechatronics Gladiator 💪

@PCBWay Год назад

You never stop to amaze us 👍👍👍

@HowToMechatronics Год назад

Thanks!

@JoeTaber Год назад

Good collab! I'm curious about how much a quote for those parts would total. I understand quotes are temporary for good reasons, but a ballpark would be nice.

@cvspvr Год назад

jlcpcb > pcbway

@PCBWay Год назад

@@JoeTaber About $700 for 15 pieces with DHL courier service.

@patracy Год назад

@@PCBWay well, I submitted a quote for a set of parts. Guess that answers that. Ooof.

@Loro310 Год назад

Amazing channel!! Great work!!

@HowToMechatronics Год назад

Thank you! Cheers!

@jamesquinn6662 Год назад

Its be interesting to see a mostly 3d printed housing, bearing cartridge etc but with a cnc input and output shaft and cyclodal disk. Try and reduce some of the mass of the cnc

@HowToMechatronics Год назад

Yeah, that's a good point. A combination of the two versions would be best solution for some DIY projects. The cycloidal disks are most important in this case I think and they can be made out of some metal material, in combination with some metal rollers.

@KhangNguyen-dn6nt 9 месяцев назад

I have a sleeping problem and this video have helped ;)

@beatfight1 Год назад

Greetings from the company that manufactures these gearboxes. 👋🏻 I work at Sumitomo Cyclo in Germany.

@The_Unobtainium Год назад

How can you tell the parts were "exactly the same as in the "project"? I haven't seen micrometer in your hand to check it:)

@moses5407 Год назад

Apologies if this has been answered already. How backdrivable is the cnc machined version? Thanks for this great work!

@youtyba8274 4 месяца назад

Для тех кто не знал это "Волновой редуктор" изобретён ещё в 1959 году.

@davib8963 Год назад

super cool, i'd like to make one as well.

@kinzokushirogane1594 Год назад

What is it that is skipping inside the gearbox once it reaches max torque?

@empatikokumalar8202 6 месяцев назад

What is the name of the device you used to measure at 0:29?

@Acoustic_Theory Год назад

Just note that like Autodesk, Dassault Systemes has a history of offering "free" or "affordable" tools for "makers", then increasing the price as time goes along. It's not an offer that I would expect to last forever.

@MaxDetlefson Год назад

How much did the CNC version order cost?

@meistro32 Год назад

Fill that gearbox with oil, see how much that will increase the torque. there must be signifcant friction with all those loose bushings.

@matthewmeans871 6 месяцев назад

after seeing the failure of the threaded inserts at 18:17, I had to look at my own design and question whether the inserts would fail for a 13 Nm application on the output shaft, however in looking back I realized that you only had the torque distributed on two pins for that whole load rather than the whole 6 pins available. This leaves me more hopeful? I'll comment back on this whether I get significant plastic deformation for my version as well.

@matthewmeans871 6 месяцев назад

Also, for these parts from PCBway, I'm curious, how much did this cost?

@ReclaimerStudios Год назад

Perhaps having the drives filled with some transmission fluid might help with the gear slipping/damage.

@camiloguerrero4632 Год назад

Hola. Exelente proyecto. Quería saber si es posible realizar este mismo proyecto con la combinación de impresora 3d y cnc láser co2, máquinas de escritorio. Combinado con pla y mdf, madera o acrílico. La idea es hacer robótica a una escala más grande. Pero con materiales más económicos como el mdf y Pla. Para realizar una caja de engranajes de reducción de velocidad y ganar más fuerza con los motores. Muchas gracias por tu trabajo es una inspiración para todos.

@xoxot_shamana Год назад

Интересная конструкция. Чем она лучше или хуже обычной планетарной передачи?

@Dclxvi6x3 Год назад

I bet you would get different results if the motor was more secure. Those clamps still let the motor twist thus losing energy. Also a piece of steel instead of plywood should help 😉

@frankdearr2772 2 месяца назад

great topic, thanks 👍

@HowToMechatronics 2 месяца назад

Glad you liked it!

@sanchitpatil6970 Год назад

Are the distance ring in the CNC Machined Drive 3d printed ?

@FUKTxProductions Год назад

isnt this subjective to the 3d printer/print quality you use? also fdm/resin/sls (eg printer type)? plus your method of cnc machining?

@Dane33781 Год назад

You should lubricate the bushings and test again. You're losing a fair amount to friction.

@stefanrodic5398 Год назад

You are back!

@HowToMechatronics Год назад

Yeah, I guess I'm back with each new video. 😅

@Shocker99 Год назад

This seems like aluminium vs plastic instead of milling and turning vs 3D printed as the title states... of course, they're all CNC machines.

@FCFDave Год назад

Very nice design and presentation.

@HowToMechatronics Год назад

Thank you! Cheers!

@h3Xh3Xh3X Год назад

I wish you would include cost for each version

@user-uo1yn4se8r Год назад

i think the backlash might also be because the pins are only fastened from one side of the disks

@chrisBruner Год назад

good job! A question, why do you need bushings around the cylinder, wouldn't the cycloidal gears just roll on the pins (assuming the right size)? Bushings shouldn't be moving should they?

@HowToMechatronics Год назад

The bushings should move, that's rolling and it would produce less friction than the cycloidal disk sliding on the pins directly. Also they can be replaced more easy if they out.

@kalmorgan2925 Год назад

Can you get the same mechanical and electrical properties with 3D printed material?

@filmweaver2013 Год назад

AWESOME!

@HowToMechatronics Год назад

Thanks!

@Caribbeanminds Год назад

I need a sprocket or something that can work with a motor and bicycle axle. For my e-bike build. In Florida

@Frankkakdslasdkasd Год назад

Amazing video!

@HowToMechatronics Год назад

Thanks!

@albertolionello3435 Год назад

Hi Franco, I work for Sumitomo and we are the inventor of Cyclo drive System. If you are interested we can describe the advantage of this principle compared to other system. Thanks.

@nepotech7517 Год назад

Can you make video on open pnp cnc?

@settlece Год назад

thanks

@daiaki1975 Год назад

In case both CNC and 3D print are hybridized, what parts should be CNC machined? I think backrash and housing rigidity are important, so cycroid gears, bush housing, input shaft and output bush housing should be aluminum. Outercase, motormount, some sims, output basement can be printed. How about your opinion?

@mpbello Год назад

When you mix materials with very different thermal expansion coefficients, in a gear that is supposed to be quite precise and have low backlash, you are in for some adventure.

@overlordmelon2325 11 месяцев назад

You could try using drill bushings instead, they are pretty accurate if a bit expensive. Otherwise if PCBWay is sponsoring you might as well just order some custom lol, I've ordered hardened 440C bushings from them and they came out quite accurate too.

@HowToMechatronics 11 месяцев назад

Thank for the input!

@bustin1253 Год назад

I know you did them both the same so you could test the material against eachother with the same dimensions but if someone wanted to make a strong 3d printed version, all you would have to do is make all the engagement points at least twice as thick.

@HowToMechatronics Год назад

That's right.

@bibinthomas369 Месяц назад

Is it legal to use your gearbox design for commercial purpose.

@Diskretisierung Год назад

the measuring was a little bit weak compared to your overall effort Love it

@temyraverdana6421 Год назад

Wonderful!

@HowToMechatronics Год назад

Thank you! Cheers!

@amazac9869 Год назад

Excellent trials, any noise dB readings?

@HowToMechatronics Год назад

Yeah, I forgot to take noise dB readings.

@chiraz111 Год назад

I have a great application for those gearboxes. What about a motorized telescope mount? I'd love to have some ultra-low backlash, high-torque actuators to make one...