Creo Mechanism Dynamic Option

Hi Everyone, I have a project Industrial conveyor, but i bit confused about the mechanism.... I want to create a moving object on the Belt but i am still the same issues, the moving part is not going anywhere but the belt mechanism is active. can u guys help me to solve this problem (The goal is the belt and moving object will move together). Should i use the 3D contacts and gravity?? (If yes, can u show me the tips)