This video introduces the concept of epicyclic gear trains, how dramatically they differ and their degree of freedom using animation. Its application and benefit in gear boxes and a schematic representation is also presented.
0:17 How are they different from simple gear trains?
0:30 Demonstration using two identical coins
1:17 ANIMATION of the rolling coin trick
2:02 Replacing coins with gears
2:10 Planet and sun gears
2:32 Arm and annulus or ring gear
2:57 Degree of Freedom
3:10 ANIMATION like a simple gear train with arm fixed
3:32 ANIMATION motion of arm added
3:46 Advantage of more DoFs — Gear Box!
4:36 Schematic representation
4:56 Calculation of number of teeth using the schematic
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