Expanding Cobot Applications Through a Movable 7th Axis
Collaborative robots are increasingly used in modern manufacturing due to their compact design, easy programming, and ability to work alongside operators. However, their limited workspace often restricts deployment in larger production environments. Rodriguez GmbH addresses this limitation with the Movotrak Cobot Transfer Unit (CTU), a linear 7th axis system designed to extend cobot mobility across multiple production stations.
The CTU enables a single cobot to perform tasks across extended areas without requiring repeated relocation or complex mechanical modifications. With a configurable travel range of up to 10 metres, the system allows manufacturers to redesign production layouts with greater flexibility while improving equipment utilisation.
From an automation engineering perspective, extending robot mobility through an external axis is often more practical than installing multiple dedicated robots. A movable cobot platform can reduce hardware duplication while maintaining production adaptability for changing manufacturing requirements.
Flexible Integration for Modern Production Lines
The Movotrak CTU is designed for integration with various standard industrial cobots through modular mounting configurations. The system supports horizontal, wall, and ceiling installation, allowing engineers to adapt the robot position according to workspace limitations and process requirements.
This flexibility makes the CTU suitable for applications where production tasks are distributed across larger areas, such as machine tending, inspection operations, and material handling. Instead of designing a separate robotic cell for every workstation, manufacturers can create shared automation resources that move between different process points.
The ability to save robot positions through the Freedrive function further simplifies commissioning. Operators can manually guide the cobot to required locations and store positions directly, reducing programming effort during system setup and production changes.
Integrated Collision Detection for Collaborative Operation
One notable feature of the Movotrak CTU is its integrated collision detection capability during movement. When the system detects an unexpected collision while travelling, the axis automatically stops operation to reduce potential risks in human-machine interaction areas.
This function improves operational safety awareness in collaborative environments where operators and robots share workspace. However, collision detection should be considered as one part of a complete safety concept and does not replace certified protective measures required by applicable machine safety standards.
For industrial applications, combining mechanical flexibility with safety monitoring is becoming an important design approach. Automation systems must not only achieve higher productivity but also maintain controlled interaction between humans, robots, and surrounding equipment.
Rigid Mechanical Structure for Extended Robot Movement
The Movotrak CTU uses two linear units to provide increased torque capacity and structural rigidity, including situations where the cobot arm reaches extended positions. Maintaining mechanical stability is essential because external robot axes must handle dynamic loads generated by acceleration, deceleration, and arm extension.
Rodriguez supplies the CTU as a complete system solution, including drive components, gearbox, control cabinet, and application-specific mechanical design. This approach allows integration engineers to configure the system according to individual production requirements rather than adapting a standard robot cell design.
A rigid linear transport platform is particularly important for precision tasks such as inspection, dispensing, welding, and grinding, where excessive vibration or positioning deviation can affect process quality.
Application Areas Across Industrial Automation
The Movotrak CTU can support a wide range of manufacturing processes requiring extended robot coverage. Typical applications include:
- Inspection and testing of large components for quality assurance processes
- Machine tending operations across multiple machining stations
- Material handling including picking, palletising, and packaging tasks
- Large-area welding, soldering, grinding, and dispensing applications
These applications demonstrate a shift toward more adaptable robotic architectures. Instead of fixed automation cells designed for one specific process, manufacturers are increasingly adopting flexible platforms that can be reconfigured as production demands change.
Engineering Perspective: The Future Role of External Robot Axes
The development of solutions such as the Movotrak CTU reflects a broader trend in industrial automation: improving flexibility without increasing system complexity. External robot axes provide a practical method for expanding cobot capabilities while preserving the advantages of collaborative robot technology.
In future production environments, modular robotic systems will likely become more common as manufacturers seek shorter deployment cycles and greater equipment utilisation. A movable cobot platform can become an important component in factories where product variations, small batch production, and frequent process adjustments are standard requirements.
