When sourcing a 3 Axis Robot (typically Cartesian or Gantry types), you must prioritize Payload Capacity, Stroke Length (X, Y, Z axes), and Repeatability. For industrial precision, look for a repeatability of ±0.02mm or better. Ensure the Drive System (Ball Screw for high precision or Synchronous Belt for high speed) aligns with your specific application needs. Additionally, verify the Motor Type, favoring AC Servo Motors for closed-loop control and higher reliability compared to basic stepper motors.