An autonomous robot with a modular conveyor belt moves materials in a warehouse or other industrial environment. Example embodiments may include systems and methods for autonomous robots with conveyor systems. An example method may include detecting, by an autonomous cart, an unloading station, moving to a position at or near the unloading station, and determining, using a first load cell, a first position of a first item on a conveyor belt of the autonomous cart. Some methods may include determining a length of time for which to actuate the conveyor belt based at least in part on the first position, and causing the conveyor belt to unload the first item from the autonomous cart by actuating the conveyor belt for the length of time.