Published on December 10, 2017
Input: pink slider linearly reciprocating.
Output: grey shaft.
When the shaft moves to the right, it rotates 180 deg. at the end of its stroke thanks to the gear-rack drive.
When it moves to the left it does not rotate at all because of the ratchet mechanism of red pawl (one way overrunning clutch,
The grey arm of two red rollers and the yellow runway ensure that after one double stroke the shaft rotates exactly 180 deg.
Disadvantage: possible jam when the blue gear starts to mesh with the rack so their teeth should be rounded as much as possible.
Inventor files of this video:
