Choosing a belt-driven linear actuator for automated machinery comes with a common problem: It can be hard to find all the high-performance features and reliability attributes you want in a single unit.

As manufacturing becomes more automated, six-axis robots are gaining popularity on the factory floor. Increasingly, multiple six-axis robots perform consecutive operations on the same assembly line. In these applications, adding a seven-axis linear actuator — also known as a robot transfer unit (RTU) — can boost your productivity, efficiency and cost savings.

At first glance, choosing an actuator comes down to whether the unit can deliver the necessary performance to meet application requirements.

Automated systems rely on linear guides to provide telescopic motion or extract moving parts — often in a vertical configuration. It can be difficult to find a guide that performs these functions, withstands high dynamics and shifting work cycles, and also offers flexibility regarding stroke needs, load sizes and orientation.

One of the more difficult aspects of evaluating and specifying linear motion products is figuring out the difference between axial and radial load ratings. Because axial load ratings are typically much lower than radial load ratings, it’s important to understand the characteristics of both types of loads so you can compare the ratings with confidence.

When you need a belt-driven actuator for automated linear motion, there’s a good chance you intend to use it in an aggressive working environment.

Heavy-duty telescopic rails are an attractive option for many industrial applications, with models offering full or partial extension and a variety of cross sections and intermediate elements.

When choosing a linear actuator, portability is often overlooked. And if you intend to use the actuator in multiple locations, you can’t wait for the actuator vendor to provide field support each time the unit moves.

To move a cantilevered load, only the strongest slides will do. Not only must they support the load, but the motion must also be smooth and precise. These can be difficult criteria to meet for bearings used in carts that contain web handling equipment. A single drawer holds hundreds of pounds of gear and will overhang when open. Supporting a heavy, cantilevered load requires an exceptional bearing.

Designing high-speed automated material handling and pick and place systems that incorporate six-axis robots presents engineers with two challenges: enabling bidirectional robotic travel while also ensuring the safety of nearby workers.