They are actually common in robotics. There's not many manufacturers but there's at least 1 in Japan, because 20+ years ago the company I worked for bought them. and there's a couple in Europe we looked at. There are hydraulic motors which also use cycloidal mechanisms.
Nice work, I've been waiting for an update. Are you happy with the backlash? It looks very small. How much torque can you put though it? What is your target application and what motor do you plan on using with it to complete the robot joint?
Are you planning on publishing any of these plans? I'm working on my own design but am struggling a bit.. it would be amazing to learn more about what you did and why, so I can learn from you! This looks awesome!
How did you separate eccentric bearings on the shaft, where cycloid discs are? Did you use spacers? How do you keep them in position with a gap between them? Do you have some tips designing a main eccentric shaft?
Is there a chance I could buy plans from you, I would like to make my own reducers and I am looking for something to give me a idea on what direction to go in.
Thank you! The main advantages are that the zero or very low backlash remains constant through life, it can withstand higher loads than involute gear reducers and you can have big ratios in a very compact design
Both ones are for diferent proposals, but harmonic drives are the perfect fit for robotics. The problem is that harmonic drives are harder to manufacture, that's why I use cycloidal drives for my robot. But, if you want to buy the reducers, I would recommend using harmonic drives.
I want to try it like a mid-drive for an electric bicycle. my motor has 3200W,10000rpm and 3,5nm output. that,s why I need to be hight ratio reduction gear, compact and light. cycloidal reducer is not so easy to find on the market.
they are cycloid a mathematic defined form, so you cn parametrizate and calculated (generally consist of a circle turning around other (like a wheel on a road ) and a generator offset from the center)
Do you think you could explain the formula? I want to make some of these on my cnc mill soon. Keen as to try it out. But having trouble with the formula. I want very low backlash for a 5axis cnc mill. I have industrial quality machines so if I can draw it I can machine it to a close enough tolerance. If you have a spare couple of minutes I would really appreciate the help.
now patent it and sell it 50 you own robot market later. its cnc that machine it anyway no labour just material cost. robots need replaced after year bcoz gears start have backlash.think world where robots not cost that much,bcoz building it not cost its just. if you need robot you GONNA pay for it,but in reality robot not cost that much
beautiful creation. looking forward to seeing it all come together.
They are actually common in robotics. There's not many manufacturers but there's at least 1 in Japan, because 20+ years ago the company I worked for bought them. and there's a couple in Europe we looked at.
There are hydraulic motors which also use cycloidal mechanisms.
Nice work, I've been waiting for an update. Are you happy with the backlash? It looks very small. How much torque can you put though it? What is your target application and what motor do you plan on using with it to complete the robot joint?
Thank you Paul! The backlash is not bad (
Are you planning on publishing any of these plans? I'm working on my own design but am struggling a bit.. it would be amazing to learn more about what you did and why, so I can learn from you! This looks awesome!
Check James Bruton channel
What material are you using ?
How did you separate eccentric bearings on the shaft, where cycloid discs are? Did you use spacers? How do you keep them in position with a gap between them? Do you have some tips designing a main eccentric shaft?
The aluminum should wear off so fast. At some load, grease won't help much. Brass will be better for similar machining hassle.
Very cool, did you design/make this yourself?
Thank you. Yes, I did
@@MRBEngineering Great piece of engineering!
Great work! can you share your technical drawing files if dont mind. I appreciate your cooperation.
Is there a chance I could buy plans from you, I would like to make my own reducers and I am looking for something to give me a idea on what direction to go in.
Check james bruton channel
@@jeroenbrinkman Thanks for the heads up
Nice work ! Please, can you tell me what is the advantage of a cycloidal reducer?
Thank you! The main advantages are that the zero or very low backlash remains constant through life, it can withstand higher loads than involute gear reducers and you can have big ratios in a very compact design
Thank you for your answer. I understand, but what about energy efficiency ?
Normally the efficiency is lower than the planetary gearboxes or the harmonic drives
Thank you. It is pity.
Why do you make Cycloidal reducer instead of Harmonic ?
Great work! What bushings/bearings did you use for the housing pins/screws? Thanks!
What's bearings do TH-cam use?
Cool. Please show how you made it.
I am preparing a video where I show all the details, I hope to get it ready soon
@@MRBEngineering looking forward to seeing how !
@@MRBEngineering is it possible for you to send me cad files? (or buy them?) Only for this Cycloidal Reducer
It's amazing and work perfectly,
Can you learn me how can I design and make one of this?
Thank you!
Here you have a good tutorial from SolidWorks: th-cam.com/video/yIpnEZ_rjZY/w-d-xo.html
Try a mechanical engineering study 😐
I want to build my own robot but torn between a cycloidal vs harmonic drive. Which one you think it's better?
Both ones are for diferent proposals, but harmonic drives are the perfect fit for robotics. The problem is that harmonic drives are harder to manufacture, that's why I use cycloidal drives for my robot.
But, if you want to buy the reducers, I would recommend using harmonic drives.
vibration?
is there an email where we can reach you?
I want to order one.
I would like to know what use will you give it
I want to try it like a mid-drive for an electric bicycle. my motor has 3200W,10000rpm and 3,5nm output. that,s why I need to be hight ratio reduction gear, compact and light. cycloidal reducer is not so easy to find on the market.
Hey how did you calculate the correct tooth profile?
they are cycloid a mathematic defined form, so you cn parametrizate and calculated (generally consist of a circle turning around other (like a wheel on a road ) and a generator offset from the center)
Do you think you could explain the formula? I want to make some of these on my cnc mill soon. Keen as to try it out. But having trouble with the formula. I want very low backlash for a 5axis cnc mill. I have industrial quality machines so if I can draw it I can machine it to a close enough tolerance. If you have a spare couple of minutes I would really appreciate the help.
@@carbidecuttersnzltdandrewb8449 did you manage to make it??
@@njki212 no I got busy.
Do you have a model I can use
Hanzhen harmonic gear , robot joint gear , acurator , over 30 years experience
This gear box has 2 cycloid disc doesnt look like 1:19 ratio....more like 1:19x1:19= 361
two discs does not automatically mean two stages. They are offset by 180° to compensate for vibrations caused by the eccentric nature of the discs.
Interesting!
People have reported hearing this kind of sound (from turnstiles) coming out of UFOs ...
Do they use a similar device?🤔➡️🛸👽
that could prob lift a truck
Very nice in deed. For anyone wha wants to do the same, there is a fusion360 plugin for cycloidal gear design here: github.com/benbreen/Cycloidal
now patent it and sell it 50 you own robot market later. its cnc that machine it anyway no labour just material cost. robots need replaced after year bcoz gears start have backlash.think world where robots not cost that much,bcoz building it not cost its just. if you need robot you GONNA pay for it,but in reality robot not cost that much
?!? this is a hypocyloidal gear.. invented nearly 100 years ago.. nothing to patent.
@@joansparky4439 well that sucks.so we poor still xD