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3D printed cycloidal gearbox build and tolerance

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Official website: source-robotic...
Join our discord community: / discord
Check out our forum and ask questions: discourse.sour...
In this video, I explain how to assemble a cycloidal gearbox for faze4 robotic and how to get the right tolerance.
Follow the project on patreon and get access to STEP files!
/ pcrnjak
About this robotic arm:
- fully open source
- 6 AXIS with stepper motors and cycloidal gearboxes
- reach of 70 cm
- weight around 15 kg
- cheap - less than 1000 dollars
Join our discord community: / discord
Follow the projects on hackaday: hackaday.io/pr...
Follow the project on Instagram: / 5arcrnjak
Programs used will be on GitHub: github.com/PCr...
Insagram: / source_robotics
Building instructions and BOM can be found here (In building instructions PDF)
github.com/PCr...
STL files of GEARBOX and WHOLE arm are also on github:
github.com/PCr...
DOCS can be found here:
faze4-robotic-...

Опубликовано:

28 авг 2024

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Комментарии : 33

@mrHazzardous6 4 года назад

As an electrical engineer, designing gear boxes terrifies me haha.. Awesome work

@zakel5750 3 года назад

www.otvinta.com/cycloid.html

@Kawka1122 3 года назад

You will cry?

@vivekchanchal3312 4 года назад

Bro can you plz tell the backlash , and can u do show some torque test video. ...? Although bro. Great work👍🏽😁

@mmoci81 2 года назад

Bravo, svaka čast!

@jaimezuleta8125 3 года назад

Excellent Work. Greetings from Venezuela.

@2ndLifeLabsLLC 4 года назад

Nice work, I hope you have time to create additional assembly videos.

@bowaller6892 3 года назад

Nice video, I'm glad you share this one. Just wanted informations about this component for knowledge, I'm not engineer.

@emciem1 4 года назад

Nice work Petar. Do you have an Excel Sheet with the formulas about how to design the cycloidal reducer? Thx

@Dagor 4 года назад

How big is the reduction of this box?

@i-make-robots 4 года назад

Hello! Long time fan. What is the estimated total cost of your robot?

@johnnienathan2808 3 года назад

Amazing work. One question though, does the reduction, 12:1 or 10:1 affect the output torque ?

@johnnienathan2808 3 года назад

@@source-robotics okay, thank you

@Pradjaya 3 года назад

Sir, why do you mark the cyclo part? I rotated the top cyclo by 180 deg.but the output holes are not lining up like yours. What have you aligned the dots to? Thanks.

@TheRainHarvester 4 года назад

Do you think using a skate bearing (8mm id, 22 od) would work? I have a lot of those.

@justin60222 3 года назад

GD&T my friend

@SergioGonzalez-gu1bk 4 года назад

Is there any guideline or books that can help me with these gearboxes design?

@jonvanderkreek9897 4 года назад

Nice! what is the backlash ?

@jamesmatheson5813 3 года назад

Here's what i think I think if you make a 6 to 1 And put 6 off centers so there are 6 points that move 6 rings one tooth and you put one ring around the 6 rings so the one ring does a full turn when the motor turns once that you will make a 1 to 1 ratio increase torque I believe that is what God intended a cyclodial to be used for Because anyone can make 12 teeth move 11 and the 11 goes up by one tooth or 100 moving 99 But 6 off centers moving a outer ring once when the motor moves once cannot be done any other way Please try what i suggest

@minercraftal 3 года назад

Well my expectation is to see how it works...

@ExotiC255 3 года назад

Hi Petar, I am currently building your robot but I was wondering how much payload it will be able to handle. Can you make any estimate on that? Thanks for the nice build! Cheers

@source-robotics 3 года назад

1 kg at low speeds. If you have any more questions about build feel free to ask!

@ExotiC255 3 года назад

@@source-robotics Great, thanks for the fast response! Indeed I have a pile more questions but most of them I will figure out on the way I am sure :) One thing I was wondering though is how I would control the six motors as it seems on the documentation websites of your robot, that you stopped selling the pcbs that you had designed for it. I thought of resorting to this option called "GRBLDuino MegaShield" ( www.tindie.com/products/eccentricwkshp/grblduino-mega-shield-grbl-11-arduino-cnc-shield/ ). I would love to hear your thoughts on that or alternatives to it. In your "CM6 Cobot - Motor jog demo" I saw some other driver(?) assembly in the background, so maybe you use something else these days? Cheers!

@ExotiC255 3 года назад

@@source-robotics Also all the circular print patterns give me a hard to to find a good way to print with nice adhesion. There just is too many small circles that dont stick. Maybe you have a pro tip for that?

@source-robotics 3 года назад

What printer do you have? I printed all parts with PETG and 0.35mm layers. Also no support, you can use bridging for most of the stuff.

@ExotiC255 3 года назад

@@source-robotics I work with a ender 3 pro. I also use PETG as advised by your website but I stick to 0.2 layer height for everything. You mention to vary between 0.35 and 0.2 I think but I didnt know when to use what, so I thought 0.2 should be good. I can barely believe that you didnt use supports on the big parts. I am printing the joint 3 cover right now and I didnt dare to just rely on bridging. Especially because I think PETG is inclined to warp on the larger parts when using a lot of aggressive cooling. Maybe I am wrong on that though, dont have that much experience in printing yet.

@jcjensenllc 3 года назад

No "money" shot of it working.

@ockemont 2 года назад

Where can I buy it?

@source-robotics 2 года назад

You cant. The whole robot made with these actuators is open source so you can build your own.

@jamesmatheson5813 3 года назад

What i don't understand is why you don't put a pinion from the eccentric and make the pinion turn once using the.cyclodial to make a 1 to 1 ratio increase torque ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9l9QMz67J0c.html You put the pinion where the cyclodial moves one tooth and make the pinion turn once making the pinion have more torque Why wouldn't you do that