Industrial robots range from single‑axis to seven‑axis configurations. The more axes (degrees of freedom) a robot has, the greater its motion flexibility and the wider its range of applicable tasks. Each axis count offers distinct structural characteristics, kinematic capabilities, and typical use cases, as outlined below.
One‑axis robot
Also known as a linear module or electric slider, it provides only a single linear motion. It serves as the most basic motion unit, often combined with other modules to achieve complex trajectories, and is widely used as a building block in automation equipment.
Two‑axis robot
Composed of two orthogonal linear modules, it enables planar X‑Y motion, commonly used for simple positioning and material handling.
Three‑axis robot
Also called a Cartesian or gantry robot, it features three mutually perpendicular linear axes (X, Y, Z). With a simple structure and good rigidity, it is suitable for dispensing, soldering, and basic pick‑and‑place operations.
Four‑axis robot
Adds one rotary axis (typically around Z) to the three linear axes. A typical example is the SCARA robot. Besides translational motion, it can perform planar rotation, making it ideal for assembly and sorting tasks that require rotational positioning.
Five‑axis robot
Adds a wrist‑swing axis to the four‑axis configuration, allowing the end‑effector to tilt or pitch, thus enhancing orientation capability. It is often used for complex surface machining, cutting, or deburring.
Six‑axis robot
Currently the most widely used type in industry. With six independent rotating joints, it can achieve full spatial positioning and orientation, sufficient for most industrial tasks such as welding, painting, assembly, and grinding. To support six‑axis robot integration, we can custom‑design end‑effectors, quick‑change devices, and mounting flanges based on customer workpiece geometry and process requirements, improving adaptability in specific applications.
Seven‑axis robot
Also referred to as a robot walking axis or external linear track. It adds a seventh linear axis to the six‑axis base, primarily to extend the robot's working radius and allow movement over a larger area. Common applications include welding, casting, large‑structural machining, smart warehousing, and aerospace. For seventh‑axis systems, we can supply custom‑manufactured track components, cable carrier brackets, and locating fixtures to ensure seamless integration with the robot body.
In summary, more axes are not always better – the optimal choice should be based on the required degrees of freedom, precision, and payload for the specific task. Multi‑axis systems offer greater flexibility but also demand more complex programming and control, requiring a balance between performance and cost.
