A Backdrivable 20:1, Finally!
ฝัง
- เผยแพร่เมื่อ 21 พ.ย. 2018
- Here’s the perfect video to nurse your thanksgiving food coma. Enjoy.
Check out my Patreon Page! / geardownforwhat
This Design is available on Thingiverse: www.thingiverse.com/thing:323...
Where you can buy a 3D Printer: goo.gl/gwKB6J
My Favorite Cheap Filament! :goo.gl/FuzECr
For Strong Filament! CF Nylon (NylonX) : goo.gl/a6zeQd
Special Nozzle for NylonX: goo.gl/WTNhxq
Matterhackers: goo.gl/PxNhqg
Follow me on Twitter
/ gdfw17
I post most of my designs on thingiverse
www.thingiverse.com/Gear_Down...
Would you help translate my videos? : th-cam.com/users/timedtext_cs_p...
Links to products in this description may be affiliate links. These links do not add any additional cost to your purchase, but the channel gets a small kickback, which helps us a bunch! Thank you! - บันเทิง
This old Tony has been a bad influence. Lol. Loved it.
Badgermatt75 2016
But he hasnt yet mastered the one inch stock cutting punch. Until then ToT is still the sensei.
Same awersome saw
Did I miss a hidden "subscribe" or was it not there? (I often don't notice them on the real ToT too)
I considered writing it on the back of my hand and showing it for a frame or two.
hamjudo
At 0:45 he cut those pins just like TOT.
Stepped planetary gears, common carrier. It's going to take a while for me to figure out the math on the gear ratios.That didn't seem like the right kind of saw for cutting thin steel round stock. It reminds me of american precision: measure with a micrometer, mark it with a chalk, cut it with an axe.😜😁🤣
Lol!
@Vincent Robinette that's precisely what America is.
It works tho right?
Cough cough NASA
that moment in wwll that the americans had to tell british engineers to tighten their tollerences or else they wouldnt be able to manufacture their parts
Must be inherited from the Brits.
One trick on your thrust bearing balls is to alternate with a slightly smaller ball that will spin freely in the opposite direction with far less load on the races, less losses. Could use plastic smaller balls also. This construction is used in aerospace for like the B1bomber ball screw wing deployment.
Wow! I love that idea. I just might have to use that!
Can you elaborate on the details of this thrust bearing design or provide a link to some details?
@@dontfeelcoldIf all the bearing balls are the same size, they will all be touching the grooves and each other. The grooves will try to keep them all rolling in the same direction, but that means that they are all turning against each other's sides. As they rub together, that increases friction...it's less friction than without any bearings, but not optimal.
With alternating smaller bearingballs, the smaller balls won't be able to contact the grooves on both sides, so the grooves won't be able to make them roll in the same direction as the larger balls. Instead, as they rub against the larger balls, the smaller balls will turn backward relative to the others. There are fewer surfaces rubbing counter to each other, therefore the friction is lower.
Think of it like a series of gears connected linearly. If they all have to turn the same direction, they won't be able to. If they can turn in alternating directions, they will all work. For bearings, the meshing of the gears in the example is like friction. Of course friction can be overcome, but less friction means a more efficient bearing.
Why do you think he made this?? He's making his own B1 bomber, duh...
Brought to you by the school of ToT sawing, by the school of HowToBasic fastener handling, endorsed by whoops-i'm-gonna-drill through my finger, and sponsored by googly-eyes-everywhere.
(yes, i know at that point it's not an actual drill bit)
Lol. Your references are spot on
@@GearDownForWhat I'm sure i didn't get all of them. I forget who does stop motion arrangements for their parts.
Frank Howard school of part stop motion?
@@samuelt321 Yeah that's the guy!
Not familiar with Frank Howard. I got that influence from Wintergaten
When I saw all the ToT comments I literally thought it meant "tub of tears" but now I know what it stands for.
That is amazing!! The way that you made it is just.... Genius!!!
I'm not often impressed, this is one of those times. I've been working on my 3d printer for over a year now and one day I hope to get where you are now.
0:32 somebody's been watching too much This Old Tony
I love the nods to TOT lol. Happy thanksgiving to ya, thanks for giving me a reason to avoid the family
0:27 HACKING IN PROGRESS...
You may be interested in reduction device that consists of 3 flat plates stacked. The center plate is driven by eccentric from small shaft in end. In end plate are grooves shaped like epicycloid of N-1 lobes. In facing side of center (orbiting) plate is hypocycloid groove of N+1 lobes. Loose balls are placed between these 2 plates, nested in the grooves. Between the center plate & the top one is another set of grooves with loose balls in between, except the number of lobes is N & N+2 lobes (one epicycloid & the other hypocycloid, as in the lower set). The impelling of the center shaft forces the 2 outer plates to rotate relative to one another at very slow speed (giving high reduction with relatively few lobes). Axial compression takes up all backlash, & all contact is pure rolling (the balls transfer the forces between the plates) & are distributed reducing stress.
If you decide to machine these parts from metal, all the stock is flat plate, & all cutting except the grooves can be done with manually operated lathe. The only CNC required is for the groove, where relatively small amounts of metal needs removing, & all the machining is on a planer surface.
The robotics team I'm on (2052) uses nothing but planetary boxes... I feel your pain.
This is incredible! I need to get a 3D printer just so I can print this!
what no testing?
this is like getting a family together having them watch you setup tables, chairs and food and then sending them all home. :(
Damn..u need to put more videos of the gear being spinned..tested etc.
congrats, you invented a drill transmission
I dont even know wut this is but its recommend
i love the hand to edit video :)
Sweet pepper grinder :)
Bearings can't be installed with just your fingers man. You have to pound them in with the back end of a screw driver
Ivan needs to teach him the ways.
I want one just a fiddle with it pretty cool as usual bro
You should really consider creating a course on some mooc site or even in TH-cam perhaps and share the knowledge you have... Be it gears or plastics or 3d modelling etc
Always a to watch your videos
Very good
Nice info, thanks :)
Very very nice. Its good to see some more metal in your design. Now you need to use that same design and make another one of those winches and stress test it.
It’s easier to justify the the cost when I can make a little revenue on the video.
@@GearDownForWhat Your content is the kind I would actually pay for, if I had funds. Alas... Keep up the good work, for free. I'm sure the adoring public will reward you eventually.
Have you tried actually replacing a gearbox in a powertool with a 3d printed one yet?
Someone watches this old tony
i thought he was copying Ichiban Moto...
That's quite the ball loading technique....looks like you've done this just a time or two. :P
Haha
Please do a 1:infinity
Exelente . muy buena edicion de video.
Build a small hoist with a ridiculous amount of sheeves and see what weight you can pull with something silly like cotton or something
Show a video making the 60 to 1 planetary gear
Hey, I have a challenge por you: What is the maximum amount of force (I mean, useful, like you can gear up to infinity But it will take billions of years to made a turn and be useful) that you can take out of small dc motor (like the ones inside toy cars) using this type of gears (planetary)?
I really wish there was an explanation of this.
Someone needs to let this man know that some very weird shit happened that defies explanation from 43-:47...something mysteriously quantum leaped through space and time by disassembling itself...then reassembled itself 2 inches away from where it disassembled itself...for what reason I have no clue...
looks like you are on a roll.
Dude, get yourself a small arbor press from the Harbor Fright.
You should sell these things pre assembled
I'm sure people want to buy from you
You're awesome, I'm SO glad you have a patreon page! Other than "just because", do you have any applications/uses for this little marvel?
That drywall saw part is upsetting for some reason.
Justin Cynor
I can’t figure out if the drywall saw is his mocking US or just tongue in cheek.
Like the pipe wrench my old Instructor kept in the Machine Shop.
There was no purpose to it, and that was its purpose.
Yeah, I hate the way he tried to cut using the wrong edge of the tool.
Measure it with a micrometer, mark it with a chalk, cut it with an axe.😜😁🤣
agreed.
very upsetting to me.
@@pirobot668beta Is there a right edge?
Came here for the reduction gear stayed for the drywall saw joke.. :)
I was able to design a very simple 3d printed 15:1 strain wave gear (harmonic drive) and it was backdrivable on the first try with just a bit of lube. It would be interesting to see how high you could go (backdrivable reductionwise) as someone who actually knows how to do stuff like this
How to make the planetary gears non-backdrivable increase the number of stages?
Now someone is going to actually try cutting metal with a keyhole saw for sheetrock.
Can I please have the method on how you calculate and design the gears?
@Gear Down For What? Which type of filament did you use for it on which printer? Because your prints are always looking so clean
Its design for mental therapy... This is your life after you get things align
the print looks so clean, can you please tell us about the filament you used, print settings etc?
Prusa i3 mk3 and matterhackers pla. It’s not about your setup or your filament thought, it’s how you run it.
@@GearDownForWhat PLA is a crappy material in the aspect of strength.
Nice job. How noisy is the finished product? (hard to tell with mic gain).
Planetary wheels that run on a groove where you have your large bearing can regulate lash and clearance, possibly leading to more reliability on a 3d printed part. Cool bean, mang.
Very ASMRish
life hack: because the bigger teeth remove more material, drywall saws work perfectly for cutting through metal
But also leaves a rougher cut
It sounds like this required some dedication! Do you think it's possible to backdrive higher ratios? What's practically going to get in the way? Congrats.
wonder ????
is there a way to gear multiple filament extruders on 1 input motor?
Can you please tell me which 3d printer you printed these gears on?
Is there any way to get two of these assembled by you using the alternating large and smaller thrust bearing config?
Are those two thin section bearings designed to withstand the axial pressure which comes from pressing together the homebrew ball bearing? Or are they just regular ones?
can you make variable gear for cintrifugal supercharger ?!
Backdrivable, wow! What's the gear ratio? Also backlash?
Ratio is 20:1
Backlash is also very impressive, nothing to sneeze at for sure. it’s hard to test because the input turns.
I want planetary with 2 output shaft with ratio 3:1. Can you help with the design .dxf format please.
I need a cheap large gearbox for a project of mine. I'm an electrical engineer but I just started grad school for robotics so I'm branching into mechanical. I've just tried my first planetary gearbox and have issues with backdrivability, which is essential for my project. Is this very difficult to do? Even for a person with experience?
How did he use a drywall knife to cut that
How is this special gear type called within the field of planetary gears?
Gear up for this?!
Always use you hand as a vice.
How do you got so precise print?!
Calibration...calibration...then more calibration
Is this gearbox capable of backdriven because of the reduce ratio or because the design? Do you have a 1:100 backdriven gearbox?
Please can someone give 3d printed gravity light
How come other models weren't back drivable, too fine a tolerance?
Other gear sets with this high reduction ratio are worm gear design. You can't back drive worm gears nearly as well as a compound planetary gear system like this.
I dounut get it...
what size are those thrust bearing balls?
For the non engineers, what does this do, and how does it do whatever that is better than an ordinary design?
0:27 Sawing Metal? with big teeth like this and no burrs, A How to video is needed
what is the microphone for..?
This old gear down for what
What is the Matt that you printed on?
0:38 Isn't that a drywall saw?
nope,3mm X 35mm hex head
@@GearDownForWhat I mean the green handled toothed tool covered in white powder 🦝
oh yeah it is! haha I thought you said drywall screw! haha
@@GearDownForWhat Oh haha I was just surprised it cut metal
Lol it didn’t, that was a really good jump cut of me dropping the precut part.
A clever gadget. What is it good for?
You need to seriously grease this thing because the friction will eventually be its demise.
this old tony called
He wants his jokes back?
Awesome! You created a basic planetary gear! This is world changing!
Все такие умные, шестерёнки печатают, собирают чёт, подшипники пихают. А смазывать всё это барахло кто будет?
where did the four screws go to?
I think they hold the two halves of the planetary carrier together: Please correct me if I'm wrong!
ESO PARA QUE ES???
Nice how you use the right tools for the job (from the comments guess it has to do with some Old Tony guy)! Well done on the entertainment front look forward to what you do next.
the next video is going to be a slam dunk! why do you think I put so little effort into this one?
Oh please upload this design to thingiverse😊😊
Oh I will!
@@GearDownForWhat Hell yeah mate! Just found your channel a little while ago, and your planetary gear boxes are awesome for Robotics projects :) this one really screams to be mounted to a brushless motor and an o-drive.
@@michaelangeloonassis2427 Uploaded!
@@GearDownForWhat Awsome 😁😁😁
That's where I found the video :D
found your file on 5hingyve4se😃
Um... Is that a plasterboard saw...?
Planetary saw
BOTH
So what does a backdriveable gear ratio do? Isn’t every gear ratio backdriveable? If not every gear ratio is backdriveable, why is a planetary gear non backdriveable?
Зачем？
Do you ever grease your bearings? Seems it could help
Grease would only add more friction to the rolling elements. It's only used in real gearing to save gears and bearings from wear. Unless there are journal bearings or sliding parts, where grease is necessary.
@@MrDoroh yes because as we all know... Lubricant creates more friction. Make sure you don't add oil in your cars engine it will just cause friction and slow it down.
@@QargZer excess lubrication does add friction to roller element bearings, the bearings need to push the grease out of the way when there Is too much of it, its quite common for electric motor bearings to go bad due to over greasing.
Car engines on the other hand use mostly oil bearings, which (I think) are impossible to over-lubricate.
Real example: gear differentials in off road rc buggies and truggies. You tune the slip by the thickness of the oil you put into the sealed diff. Thicker= closer to a locked diff like posi traction..... but thinner oil = quicker turning radius, increased one wheel spin, if you put a thicker oil in it but do a lot of one wheel spin crazy driving the resistance from the thicker oil gets so hot, it can actually melt plastic parts.
@@GearDownForWhat In car engines the bearing surfaces never actually touch while moving because they are wedged apart by the force of the oil film. The oil film must have enough strength to keep the surfaces apart. Over-lubricating an engine bearing would mean using too much oil pressure and squirting the oil through the bearing so fast it causes excess heat and destroys the oil through shear-thinning.
What is this for?
Where the hell did you get those tiny bearings?
Amazon
Also plenty on ebay. You can get down to 1mm ID, 3mm OD. And they're dirt cheap. It's a great time to be a maker :)
What is that?
how 2 basic???
How to basic - engineering edition
im wondering, do those bearings have any purpose other than precision? load bearing should be good but the rest being plastic, i think it would work better if you could open them and replace the grease with a leaner one or even some oil so the bearings could spin more easily with less viscous resistance.
yes you could definitely do that
And lubricate the gears with a light oil of some kind! Doesnt need a whole bunch! just a little.
Why did you wash the parts?
Phonotical probably used 2 filaments to print them, 1 normal plastic and 1 dissolvable plastic to make supports and other cleanup processes easier
Я так и не понял, что это?
Редуктор вот и вся тайна
0:53 i have a dirty mind.
Those parts are still wet... why would you put metal bearings into it that way? Fail!