Coulisse and gear mechanism for 180 deg. oscillation

Input: pink crank Output: blue plate oscillating 180 deg. The go and back times of the output are not the same. It’s possible to get 360 deg. output oscillation with a larger radius of the input crank. This video was made based on the concept of Eng. Doan Van Minh, Hanoi. STEP files of this video: https://www.mediafire.com/file/s0rgec... Inventor files of this video: https://www.mediafire.com/file/73sjs9...