3D Printed Planetary Cycloidal Hub Gearbox. How far can it drive?

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Thanks for watching! I think this gearbox is pretty cool and would like to keep testing it in the future. Let me know if you have any ideas on new testing methods or anything else you would like to see.
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[@michaelrechtin]

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[@l0I0I0I0]

Michael, would this be good for turning a possibly heavy solar panel 360 deg? I'm trying to build a solar array and need precise measurements, and it will of course be in the sun for 30 years.

[@reizinhodojogo3956]

not hating but did they pay u?

[@l0I0I0I0]

@@reizinhodojogo3956 Nord is probably giving him some comp but it's understandable as it's hard to work for free.

[@Thoran666]

Nice gearbox Micheal. To test the gearbox further just let it drag some weight while doint it's rounds.

[@LecherousCthulhu]

You could just print a second tire and use them to hold up a platform that you can then place weights on. You can then use both gearboxes that you have printed in order to determine wear and condition changes over the same period while applying load to the gear boxes. This will allow an expansion of your testing because you can slowly expand this out into a small automobile with actual wheels for road testing

[@mrnlce7939]

Hate to be that guy but your tyre is on backwards. Currently the treads are pushing the muck and water in to the middle when it should be pushing it out to the side.

[@benblank609]

Thank you for being that guy.

[@ChristoffleGrange]

I came to comment this. It made me OCD go crazy.

[@EALordBaal]

Yeah lol it was bugging me also

[@straba3976]

Wouldn’t you have less grip and less movement/power efficiency ?

[@mrnlce7939]

You would have more grip. I don't know about efficiency as there would be more friction. also there would be a deeper trench as all the loose mud would be pushed to the side.@@straba3976

[@maximthemagnificent]

Aluminum cycloidal discs could be made from a plastic one using a handheld router and a carbide copying bit. Might be an interesting upgrade.

[@DEtchells]

This is a great idea, not just for this project but generally: It’d be kind of like semi-manual CNC. It wouldn’t afresh small holes that need to be positioned precisely, but seems like it’d be a fantastic general,solution for profiles. I’d *really* like to see someone explore this! (Hmm, for hole placement, what If you made oversized holes that would accept metal bushings? The bushings would guide manual drilling, I wonder how accurate that would be?)

[@maximthemagnificent]

Had the idea a while ago but haven't had a use for it yet and this seemed like possibly a good application. Saw one video a couple weeks ago where someone did this to create a roller chain sprocket but can't locate it now (curious how long that part would last). I've used 3D prints for hole layouts but have so far never needed to press bushings into them for the level of accuracy (and longevity) I required. Don't see any reason the bushing method should be less accurate than the process used to produce the holes in the first place, presuming quality bits and bushings.

[@maximthemagnificent]

Managed to find that video: kzbin.info/www/bejne/ooaWlp-Jf5uDsLM

[@jeremyplatt]

That was captivating - so good!! Thanks for sharing :)

[@aware2action]

One thing would like to see is a lot of load(may be a big rock?)on the radial arm and large gravels on the tire path.

[@kevinburke6743]

they are not spur gears. they are Helical gears! the sun & the planets being of opposite hands! In loaded environment you would have create a Axial Load. So thrust bearings would have to be employed. Saying that Helicals are quieter in operation, carry more load & have longer life. due line of contact(real face width.) Contact ratio, especially with ring gear. Greater resistance to tooth bending(fatiguing.) Keep up the good work. In Gears Quality is Life! Unless your in a race then it is weight!

[@theoldknowledge6778]

Best 3D printed reduction I've seen so far on KZbin! It looks like there's almost no backlash!!! Nice work

[@TheStuartstardust]

4:10 - not exactly backlash, but alignment of spur gear seems to be important to ensure even loads. And with this, biggest amount of backlash. Is it back driveable? 🤔 Anyway - cool project, super nice of him to release files 👍😎

[@L0615T1C]

@@TheStuartstardust That was before the 2nd cycloidal drive was installed

[@robertchristmas7050]

​@@TheStuartstardust

[@MegaCadr]

Who knew you could design gear boxes in fusion 360 so quickly? Awesome video!

[@BloodyMobile]

Engineer's version of "How to draw an owl" "Step 1: draw some circles" "Step 2: draw the rest of the fucking owl"

[@Eluderatnight]

@@BloodyMobile if they write a patent like that then its free realestate.

[@darkshadowsx5949]

I thought i was quick at designing in fusion 360. this guy is legendary.

[@badbabyboyo9593]

There are a couple of good gear building extensions for fusion 360. Idk if he used those but they are worth checking out

[@BloodyMobile]

@@badbabyboyo9593 FreeCAD also has some, including some specialized for cycloidals.

[@MatrixRay19]

Nice video man! Just a couple of things: 1. I'm pretty sure that tire tread should be run on the opposite direction(CCW instead of CW), 2. Ideally for 3D printed parts you want heat set inserts that look like herringbone gears instead of the flat ones you used, this makes so they don't slip out later. CNC Kitchen has a great video on this topic.

[@evanbarnes9984]

Glad I'm not the only one who noticed the tire was being run backwards! It was driving me nuts

[@ye1o881]

@@evanbarnes9984 i saw that too but thought "no, he made the thing, he knows best." Glad to see im not crazy.

[@theboz1419]

Ok, I wasn't seeing things weird again. that's a relief.

[@CorDawgYT]

Also I've printed tires with TPU and they turn out amazing, something to think about.

[@ronnetgrazer362]

Came here to bitch about the inserts. These are for injection modling, you want the "knurled" type. Having said that... GREAT introduction of yet another cool gearbox for makers!

[@OMGWTFBBQSHEEP]

Please do dynamic load testing! Make a Ø100 mm drum instead of that wheel, and attach a string with some weights. Then you can have a program making it spool in and out repedetly. Would be really intersting to see how it holds up. Great vid btw!

[@michaelrechtin]

Will be doing something similar to this soon. Stay tuned!

[@freman]

test carried weight and towed weight.

[@themadscientistkk]

@@michaelrechtin Or maybe just a wide rake for inside the circle

[@noahmiller794]

YES I was just going to comment thid

[@adamthedog1]

@@michaelrechtin I'd also love to see the wear on the gearbox as a result of heavy radial load! maybe suspending the gearbox horizontally with a drum with weights in it or somethjng similar. as the drum rotates, the motor should always experience approx full overhung load. part of me wonders how much the rigidity of this gearbox (each shaft looks to be pretty sturdy) will negate the danger of a radial load or what

[@avaviel]

I watched your fusion 360 tutorial at 0:40 , I know nothing about cad, and now I'm working for an engineering firm making literal boat loads of money. Thanks Michael!

[@computerwizard2613]

Tire rotation is wrong way

[@mocmaniac1571]

I would love to see the same test under some load ! But man this is a really good starting point !!! I think having slow moving parts keeps them cold, especially pla/pla+ that melts at low temperature and thus limits wear. Plastics can last very long but as soon as the become hot they disintegrate really fast

[@NigelTolley]

I've heard tell that 3D printed plastic will melt.

[@soybeanfarmer4576]

Great video! As a farmer I noticed the tire/rim was mounted the wrong way. Tread design is for reverse direction. Productive video. 2 thumbs up.

[@noahagnew6517]

Interesting, is it backdrivable like a cycloidal?

[@JohnLauerGplus]

Nice work. Yeah, I'd love to see this hooked up to a BLDC. You can use SimpleFOC to drive the BLDC. I'd like to see some load tests on it too. I also keep wondering if you get faster/slower fits and starts as it moves along those cams? It seems like I see a bit of fits and starts in the video rather than truly smooth rotation. It may not matter for the application, but a robot arm may have issues with that. If it's just used for wheels on a rover then probably fine.

[@trefle10]

Do you think we could drive this with a drone brushless motor instead? They spin much faster but have not much torque... so with more reduction if this works it could be cool to drive cars/tanks....

[@PhG1961]

Great work ! Maybe mount the motor and gear in a robot arm and perform heavy duty testing, like picking up some weights continuously.

[@crnlbwlawson]

Great design! Would love to see it load tested to failure.

[@TheParamotorGuy]

That wheel is awesome. I would like to inform you that you are either traveling the wrong direction or the tire is backwards.

[@oldtimefarmboy617]

Just for your information, the tread design on that tire is suppose to be the reverse of how you have it rotating. Where the two lugs overlap in the center should be pointed in the direction of rotation. Sort of like an arrow that points where you are suppose to go. While not important for what you were doing with it, if it was on a vehicle pulling a load and the wheels started to slip for any reason, it would allow the soil to be pushed off to the side rather than generate enough pressure to damage or break the lugs off.

[@Schradermusic]

If you want less rolling resistance, you are right. But with the direction he chose, you get more traction.

[@oldtimefarmboy617]

@@Schradermusic Actually, it has been proven to be just the opposite. If you are traveling, it does not matter what direction they are pointed, your rolling resistance will be the same. But go out to a farm and look at the tires on the equipment or to a construction site with rubber tired equipment and all of the equipment designed to pull implements that require maximum traction will always have the chevrons on the rubber tires with the point in the direction of travel when pulling a plow or a ripper through the soil and they need the greatest traction.

[@sprovost69]

Being the son of a farmer, I noticed you were running the tractor wheel backward… This is why the threads are filling with mud. If you run it in the other direction it would self clean, keeping the traction.

[@prozacgod]

KZbin Engineering check list: Interesting Idea: New gear box design. CHECK! Complex Design: Multiple cycloidal layers. CHECK! Snarky Delivery: Instructions for design are the standard 3 step format. CHECK! Overlooked Mundane Detail: The tractor tires were rotating backwards. CHECK! Yep... checks all the boxes! P.S. The tractor tires were rotating backwards.....

[@Loneman_OG]

@ 6:04 Obligatory _"that's what _*_she_*_ said!"_ 😁 Moochas grassyarse for the files, I'll make these a priority print and get one made as soon as I've printed off the other 407,942 priority prints that I'll never get done in 10 lifetimes. There's just so much Coddamned cool stuff to print out there! 😆

[@Turalcar]

0:45 Circle, smooth and inoffensive

[@ExcessiveOverkill]

Sweet, cool to see how well everything held up. Those RV reducers are what are used in pretty much all large industrial robots. I suspect you could get crazy amounts of torque out of it before it breaks.

[@yshwgth]

The tyre is spinning backwards.

[@barabolak]

You installed the tire on backwards

[@Sabe-Stormrage]

For a gearbox that's almost completely plastic gotta say it's impressive that nothing broke after 2 weeks of use. One thing you could try for a stress test is to print out a disk brake assembly and see how much force it takes to stop it or break it.

[@gordon6029]

Please load this thing up with 50 kg and let it run to destruction, testing the backlash every week.I like it and will probably be milling it out of metal.

[@Maseehullah786]

Awesome video but the tyre thread's were facing the wrong direction. V patterns thread's the arrow faces forwards . Not that it matters, Unless it's on your vehicle .

[@shinsoku9128]

His youtube for you page somehow looks exactly like mine. There was no one there that I don't follow atm

[@faraday9234]

make a roller coaster esc. circular ramp for it to go up and down on and add weight to put it under more stress. Maybe a higher rpm too?

[@oOSpecialProskillsOo]

the tire being mounted backwards is bothering me more than it should

[@vipgolfcart2524]

😂 same here my brain hurts he does not need to mount it backwords just needs to have it drive opposite direction that will Suffice

[@OldCurmudgeon3DP]

Someone else mentioned a lack of backlash. I'm curious just how tight is the FDM version? I'm looking for something like this for a (sort of) precision telescope drive.

[@amvbros]

Please make a 100 percent 3d printed robotic arm with this

[@soyo]

nice job! Could you please cite the papers that you read?

[@3D_Kam]

стоит добавить вес на колесо, чтобы была хоть какая то нагрузка.

[@LucianoBarbosaK]

make a bldc ffb wheel

[@Nifty-Stuff]

Wow! Great job on this gearbox video! I LOVE your combo of great info, design, video, and humor! PLEASE keep making awesome videos like this!!!

[@sheisillme]

Anyone else bothered to no end that the "tire" is not mounted to turn the correct direction...?

[@patri0t1776]

Just load it, weight the bar to like 15 - 25lbs at the wheel; and add obstacles to climb like irregular shaped fist sized rocks (or bigger if the tire won't slip) or just 3-6" or so ramps then a abrupt drop, rough terrain, etc. That should give you a better "real world" stress test. Nice video and build! Cheers, Patri0t

[@youarestillalive]

Hey, since your lasercutter ist working can we see part 2 of the build or not because you changed the title of the older lasercutter video? It looks rather good with a lot of custom made parts. It would be interesting to watch a second part. Tx

[@michaelrechtin]

Yes! I will be making a part 2 video

[@The_Flying_Yeti]

0:50 almost killed me! that's exactly how it feels explaining this stuff.

[@gianlucasini612]

Nice gear - couple of additional tests / improvement: 1. Add weight to the wheel. 2. Check where the dirt is entering: motor side. 3. Make it near waterproof on external: you can add a a plate to the external side and make it sealed, with an o-ring.

[@AddisonLarson]

It looks like you have your tread backwards

[@jeremyhicks6889]

Your tire is on backwards or you are running in reverse.

[@BadgerBishop]

This would make one heck of a RC rock crawler. Could you shrink it all down to work with the 1.9/2.2 wheels used in 1/10 scale RC cars? I mean, if you need a practical application for it.

[@champion9860]

Test idea: speed round endurance test, see how it looks after about 100 million rotations of the motor. P.S. great vid

[@zdog90210]

I guess thinking about it after the video, if it is properly lubricated, kept free of abrasives, not under and limits of plastic or elastic deformation, what are the limits on this running indefinitely especially at such slow speeds and low stress?

[@rcdudede]

The tutorial how to desing the gearbox🤣

[@Xappt]

The tyre is running the wrong way!!! 😃😃

[@pigi_experiment]

I'm super curios to know the maximum torque that you can apply to the gearbox.

[@reinierwelgemoed8171]

Awesome prohect man. One the threads inserts I believe its been proven that printing the threads is still superior to the inserts. Would be interesting if You added some weight out on the wheel in like 500g increments to see how far it would go.

[@Falcon23K]

You know that you live in the countryside when it triggers you that the tractor wheel is going in the wrong direction. Nice video

[@foliwe]

what resin did you use to print the gears?

[@luke.perkin.inventor]

This is awesome! Thanks so much for bringing a vast improvement to cycloidal reducers to everyone's attention!!!

[@cosmefulanito5933]

VPN ad = Instant thumb down.

[@gordon6029]

Very very cool. Did you test the backlash pre and post test?

[@leogray1091]

I actually remember seeing something very similar, after looking around more, I think it's called RV reducer. But the one they made have a fixed housing, so the cam-disk have 6 holes on it, 3 for ecentric input, 3 for output.

[@MrYrodz]

i want more resource tests like this

[@CrazyAmazingDesigns]

You’re from Ohio! Nice to meet you, I’m from Tiltonsville, OH -Nathan Robb

[@SeattleShelby]

Thanks for using cheap, standard bearings. There’s no point in 3D printing a gearbox if it takes $200 in bearings to build. If that were the case, I’d just buy a gearbox and forego the frustration.

[@dedalus1749]

Stress test: -Downsize to fit the smaller NEMA 17 -use as printer extruder -print planetary cycloidal hub gearboxes for two weeks -???? -profit

[@roidroid]

I've been hoping for a holy grail of gearboxes, which is a cycloidal or similar, but with axleless planetary gears used for the main purpose of ELIMINATING BEARINGS. These things always have way too many bearings.

[@mollago]

Super cool. You sound exactly like Dream, I thought the narration was deepfaked at first

[@pruthvimeka3259]

hey cool build. question: can this gear box be back driven? I know that cycloidal gearboxes traditionally cant be back driven.

[@tmasopust]

A couple of questions for you. I've downloaded the STEP file and imported in to Shapr3d. I'm needing to make a couple revisions as you have 0 tolerances in some areas. Correct me if I'm wrong but you cannot fit a 15mm peg in a 15mm hole. I need to add .2mm tolerance on the fit. Question 1: Are the eccentric gears all the same or are the offsets different for each 3? Without the original cad drawings, it's hard to tell. Question 2: Basically the same question for the Cycloidal Disks and Cam caps.

[@thomasmanfredotti300]

Nice job I've just printed it to build a robot lawnmower but there is a small difference on the parts called Cycloidal_Disk. The number2 external dimension is 0.2mm larger than the number 1 which is sufficient to prevent this part to roll inside the part called Wheel_rim.

[@jakubmierzejewski961]

Everything is good. Check your alignment.

[@aniketdevadiga1095]

Great video man!!! Excited about future improvements... Some of my personal suggestions are to make it a bit more dirt proof as there was gunk that got inside the gear box. And second would be to try to add a shifter so that you can shift it between high torque and high speed settings. While hoping it could be achieved within the same form factor

[@Blueyedevil2702]

Great gear box design. I'd like to use this for a smaller project and NEMA17 steppers. Can you release a version that would fit NEMA17? Pretty please with sugar on top

[@thereefaholic]

3D printing seems to have improved over the last 5 years. My JGAURAIRA printer would have required me tho throw it across the room long before ever getting the first print.

[@leogray1091]

after watching the video twice, I still don't understand how this work. I mean first time seeing a cyclioid drive with ring gear turning. My Brain is not working now.

[@movingelectrons]

I'm sure you know this already but you could make it pull or drag something for further testing. Good job 👍 overall but very bad job explaining how you actually designed it. CAD engineer grad ? Ive used blender 3d for all my terrible 3d printer garbage so far, it's like using a hammer as a screwdriver. Or putting earmuffs on your balls and expecting things to quiet down

[@kampfzwergxp]

How much torque does it have? I am building a (fully autonomous) golf-trolley and I am still looking for the right motor and gear, so the 25kg trolley with its 40cm diameter wheels will drive up to 5 mph....

[@vincebelansky425]

I know this is about your 3-D printed planetary gearbox but did you ever consider a magnetic gearbox since your application doesn't require that much torque. Nor would your application matter if a magnetic slip occurs. I recently a KZbin video on magnetic gearboxes and want to apply a speed multiplier to a water wheel / generator application.

[@danon-theautisticmaker8112]

how about doing a serious test? Make a 2 more, so u have a set of for & make a platform that u can sit on & ride?? & or put weights on to make ur design WORK instead of basically just spin. & btw, loved the vid - I'm sub'd & rung! Looking forward to more. 🙂

[@jaroslav-jaroslavsson]

Only notice that tires are usually mounted opposite way. You drive it "backward". But it makes no difference on this testing of course.

[@kaleygoode1681]

Wall mounted version would vary stress due to grabbity... Solar power and leave until it gets noisy from wear! And have a lap-counter

[@brianfhunter]

Search about Grinder Gears here on KZbin... its a double cycloidal gearbox with INSANE amounts of reduction and very few parts. I designed and printed a few models myself, but i dont have the resources to extensively test it, if you are interested, i can share it.

[@Argosh]

Gonna be using this on the RC lawn mower I'm building with my dad! Thanks dude!

[@sandormiglecz1186]

If you reverse the rotation direction of the tire, it will drive ASIDE the mud, not to the middle. See tractor tires. They print VVV as roll, not AAA pattern.

[@H0mework]

Thanks for taking it beyond extruded plastic. A lot of projects are cooler with stuff like motors and electronics. FDM shouldn’t be the end all of manufacturing

[@AbsolutionArmament]

So a while back there was a guy who did tests on PLA vs PLA+ and PLA still came out as the strongest in load strength. But PLA+ bent more before complete failure. While I could see a use case for PLA+ I don't think a gear box would be the best choice especially in planetaries. Since as soon as one get is mushed the others are soon the follow.

[@TheRenaissanceBuilder]

(OCD me) but why is the tire spinning backwards?! 🤭😂🤪

[@diegoandresbarriagarcia2334]

mathematicians: Oh i see, the numbers matches with the theory Engineers: fuck Theory, lets test it on everything I feel it could work! 3d makers: printer go brrrrr

[@jonjon737]

Hey, I'm about to be that guy. Sorry. A spur gear by definition has a zero degree helix angle. A helical gear has a non zero helix angle. You printed helical gears, or if you want to be slightly more specific, single helical gears.

[@soccerkenshin]

Dope. Tho, It tickles my OCD that the tire was spinning the opposite of what's conventional by the tread pattern. It's of absolutely no consequence to your test tho, so.... Cheers!

[@johnlocke9609]

Got an idea, you can use a 24v solar panel to drive that motor using all that torque to lift (somehow) heavy stuff in to a column, to (store energy) how? when let's say 1 metric ton is at 20 feet, you can then use a rack and pinion attached to a DC motor to generate electricity when is coming down, when the temperature is really low, the voltage/current generated could be used to heat a driveway bed so your drive way is without ice in winter, all basically done by weight/ratio of parallel small dc motors stopping the weight of wherever you can get up in to the air. Some excel sheet will help to get the best numbers.

[@SeattleShelby]

Cool design. Wouldn’t a smaller module (more teeth) make for smoother operation? More teeth engaged that way.

[@neiljohnson7587]

Wash HEAT then cure. Stephan from cnc kitchen did a video on it showing that heat treating resin before the final cure drastically increases the strength of resin parts.

[@hanyolo105]

quick suggestion (a year later :D) It may be worth a try to embed a thin steel or aluminium stripe over the smooth teeth of the cyclodial discs and therefor reducing wear and tear. Maybe it can be melted into the discs.

[@amateurwizard]

Me: Sorry honey, I've gotta go walk the grass. Honey: What?! Me: You heard me..

[@thecalvaro]

Wow.. was a great video and content. I just thinking based o. The video how much dirty got inside. I believe that will damage the mechanism if the experiment continues. So maybe, adding some feature to prevent this can add more life time.

[@johnlocke9609]

hahaha! Looove the face, because is just fkn cold to go out haha! But science first so, kudos for your sacrifice! And thank you for uploading the files! Send you cyber hugs!

[@fusionvibe]

Ohio weather been crazy this winter. mid 50's in early January. great video. subscribed.

[@toordog1753]

Bounce, because i pay for premium so i dont have to watch commercials and ypu still forced me to... way to trap your viewers, if you dotnt like or want to do thisbyou shouldn't have started...

[@AccelYT]

Is choosing resin for gears is the right choice? Seen tests that show resin is much worse for gears (wear) than even PLA which is not ideal in terms of durability (compared to nylon etc).

[@EzequielBaltazar]

My gearbox just jiggle jiggle, doesn't folds. Great mechanism.

[@ColinTrachte]

Ok cool! Now I am going to re-design this to use 6mm BBs for bearings, eliminating all the expensive metal parts.