the one it is modeled on ran a wood planer for 60 years until the shaft broke.... maybe tooth wear isn't an issue. the contact is somewhat rolling like a strain wave tooth.
Wonder how it would work in a clock design. Perhaps one can add another layer to it. The radical in the center doing seconds, then the second layer reduced to doing minutes and then a third layer reduced to doing hours.
seems doable, you could make a serial version for hours but it has a nice aesthetic and you may not want to connect them end to end because it would be hard to see the movement. The reduction is the number of holes on the outer fixed annulus so you'd have to make one with 60 for the seconds/minutes.
it doesn't seem too bad but I can't figure out what math drives the tooth profile. something about a "double sine" wave for the moving paw and envelope curves for the annulus part.
@@besenyeim True, though all conventional gear trains are made of sliding elements (right?). To me this looks like the missing link between classical gearing and cycloidals.
Very cool design!
that would make for a very nice clock
Very cool. Seems like the teeth could wear quickly. What kind of duty cycles would this see?
the one it is modeled on ran a wood planer for 60 years until the shaft broke.... maybe tooth wear isn't an issue. the contact is somewhat rolling like a strain wave tooth.
Wonder how it would work in a clock design. Perhaps one can add another layer to it. The radical in the center doing seconds, then the second layer reduced to doing minutes and then a third layer reduced to doing hours.
seems doable, you could make a serial version for hours but it has a nice aesthetic and you may not want to connect them end to end because it would be hard to see the movement. The reduction is the number of holes on the outer fixed annulus so you'd have to make one with 60 for the seconds/minutes.
Nice implementation of the patent. How is the efficiency?
it doesn't seem too bad but I can't figure out what math drives the tooth profile. something about a "double sine" wave for the moving paw and envelope curves for the annulus part.
care to share the STL (?) files?
I can but it needs a bit of work. if you want the raw needs improvement version i can put it up on thingiverse.
@@JesseSchoch Yes, please
stl is in the description
@@JesseSchoch Thank you, sir!
Great. Why did you implement half of the teeth (11) instead of the 21 teeth for which slots were created ?
Just lazy...
Now that is cool! I wonder what the intended advantage is compared to a conventional cycloidal?
not sure, the one this is modeled on was used as the feeder for a big wood planer. i'd love to find out more about the mechanism.
Were cycloidals even invented at the time? I think they were a well-kept japanese secret after they were invented?
AFAIK, a well designed cycloidal has rolling contacts only. This is full of sliding elements. More wear or smaller max load for the same size.
@@besenyeim True, though all conventional gear trains are made of sliding elements (right?). To me this looks like the missing link between classical gearing and cycloidals.
It's a bad idea since it removes the rolling contact and replaces it with sliding contact. Is it cool ? Well yeah very cool blast from the past.
Which stepper motor has been used in it??
in the video I'm using a drill, but you could use a nema 17 or nema 23 stepper.
That's a trip to watch.
The teeth are only really transferring power in a short section and the rest aren't touching as it goes around due to the cam.
Should be around 30% engagement
Harmonic drive without flexture?
the principal is similar but it needs a 1nd array of paws to balance 180 out of phase with the first like a cycloidal