Gantry systems consist of a fixed structure that operates along linear axes (X, Y, Z) within a predefined workspace. They are ideal for tasks requiring precise linear motion, high payload capacities, and movement over a large distance. Gantry systems are commonly used in applications like CNC machining, 3D printing, and material handling within specific, predefined paths.
Robots have a flexible and articulated structure, offering multiple degrees of freedom and a broader range of motion.  Robots excel in tasks that require complex movements and multiple degrees of freedom.  While robots can handle a range of payloads, they generally have a lower payload capacity compared to gantry systems.