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Good evening. I have a problem with a calculation. There are so many book that explains the calculations for each planetary gear set as a whole but i can't find info about calculating the specific gear ratio between sun and one planet when ring is grounded. The planet rotates about itself and about central axis too backwards. So in 1 second it comes to an angle that is the angle he moves because the rotation about it self by subtracting the angle that comes backwards because the rotation about the central axis. That affects ratio between sun and planet. This ratio is not really needed  in calculation so i guess that's why books don't describe it, but i need in to set the ratio in Inventor for presentation. Any help would be appreciable. Thank you.
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