Input: pink shaft rotating regularly.
Green shaft is identical to the pink one and rotates with the same velocity and direction.
Output: yellow cam shaft oscillating with dwells at its stroke ends. Oscillating angle: 180 deg.
The arcs of the two cranks are for keeping the output shaft immobile during its dwells.
It is a development of the mechanism shown at:
http://youtu.be/gV9H8Gjp8KU
STEP files of this video:
http://www.mediafire.com/file/ibjnprvcgetoguo/BarrelCamReverse180deg1STEP.zip
Inventor files:
ht
آی-ویدئو