Reversing Two speed geneva drive

grabcad

This is a rotational reciprocating mechanism, using a geneva wheel and 2 actuator discs with 2 pins each. The larger disc is the input, and drives the second through a pair of gears with a ratio of 2:1. The smaller disc moves the geneva wheel twice, 60 degrees each time. Then the larger disc moves the wheel back to the original position, 120 degrees backwards. See the plots of speed and position through time. There is no locking, since the wheel is always moving.