There's one extra-rotation from an external perspective due to the revolution of one around the other. So the formula is r1 / r2 + 1.
This extra-rotation doesn't appear from the point of view of the circles, or if you consider the circles as two stationary gears
There's one extra-rotation from an external perspective due to the revolution of one around the other. So the formula is r1 / r2 + 1.
This extra-rotation doesn't appear from the point of view of the circles, or if you consider the circles as two stationary gears