Input rotation by handle, with the variation in cam radius, due to that the roller is level with the input contact point, the output is a reciprocating motion of the roller.
Input rotation by handle, with the variation in cam radius, due to that the roller is level with the input contact point, the output is a reciprocating motion of the roller.
利用把手输入一端转速，藉由半径的变化，因输出端滚轮的高度需与输入端接触点相同，而造成输出端的高度有往复式的高低变化。