Someone brought this up on Thingiverse as well. My reply: "Yes, strictly speaking, the planet gears should have a step in the middle, with a slightly different diameter where they intersect the driven ring, and the sun gear should only intersect the half that meshes with the stationary ring. In this model, the difference is well below the manufacturing tolerance of the gears." See the rest of the discussion on Thingiverse for more details
Simply adding teeth onto the second ring gear results in uneven meshing due to different pitches. To stop this as per other videos on RU-vid, the planetary gear should be split so that each half matches the pitches on corresponding ring gears.
This bothers me as well. The reason they don't match the pitch on both halves is because then nothing would happen. This mechanism relies upon improper gear geometries.
Very good point. The greater diameter your ring gears are and the more teeth then the mismatch become small. So the more teeth (and the rings only having a difference of 1 tooth) you have, then meshing becomes less of a problem.
"To stop this as per other videos on RU-vid, the planetary gear should be split so that each half matches the pitches on corresponding ring gears." Great idea, you are a genius.
REALLY YOU HELPED ME UPGRADE MY KNOWLEDGE OF MECHANICS, THE IMPORTANT KEY, I LEARNED, IS THAT YOU'VE USED A TWO BIG GEARS, BUT WITH 2 TEETH LESS ONE OF BOTH, I NEEDED TO THINK CAREFULLY YOUR VIDEO TO UNDERSTAND TE REASON OF THE HIGH RATIO REDUCTION WITH JUST FEW GEARS, IS GREAT, THANKS SO MUCH
Congratulation !!! now you invented the wheel !!! It's called "split ring and split sun differential planetary gear" And by the way, the "Differential roller screw" work on the same principle. I wish you enjoy your new 3D printer.
Gear Down For What? Por favor, minha intenção é construir um mecanismo onde preciso de velocidade, neste sentido, se eu fazer com que o "anel" gire, o "sol" vai ter mais velocidade na relação com os "planetas" certo?! Use o Google translator de Português Brasil. Many thanks.
Very similar to the "Harmonic Hyperdrive". Yours has a little less gear reduction. But that could be useful too. Also, yours has higher strength potential and ease of manufacturing, I suppose.
Very nice work. I'm considering options for a robots shoulder joint. Could this be reinforced by simply giving the carrier a third planetary gear, or are there more modifications needed?
This is very nice for printing and theory, but did anyone ever succeeded following this principle in "real life" conditions using actual Module gears available for purchase?
hi, this was very helpful. thanks i have a doubt how do we calculate the gear ratio of the final output from the yellow ring gear. How did you conclude that it makes 16:1 reduction?
yes, you would be running the system in reverse so driven gear could be first stage sun or carrier. That would give a higher RPM output at lower torque.
He said that the yellow ring has 32 teeth, which is 2 more than the red ring. This means that the yellow ring advances 2 teeth per revolution compared to the red ring, so divide those 2 into the total number of teeth (32) and you get 16.
@@MattKeveney These type o planetary systems are usually self locking. You can not turn the yellow gear relative to the red gear, just by applying torque between them
hi, this was very helpful. thanks i have a doubt how do we calculate the gear ratio of the final output from the yellow ring gear. How did you conclude that it makes 16:1 reduction?
