By using maya, I did quick modeling of moving object and its mechanism for the projection mapping. First one concept comes from the music box like orgel. As two axises of fins rotates, they hit center axis to create rotating motion in setting time. Therefore, user can control the time and speed of the rotation by adding counter fins.
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The next one is using gear system to create rotation and linear motion at the same time. Linear motion is made by gear with stepper motor and rotating motion at front is created by single servo motor. Just like fin motion, selecting gear ratio can be used for making different effect of action.
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