When you're working with vertically oriented applications that employ rodless actuators, there are a few design considerations to keep in mind. All too often, motion control system designers fail to correctly apply rodless actuators in vertical applications. This mistake is common, but a better understanding of the technology will help you avoid it.

For precise automated positioning, think stepper-motor-based linear actuators. Linear actuators essentially generate force and motion through a straight line. In a typical mechanical system, a device’s output shaft would provide linear motion using a rotary motor through gears, a belt and pulley, or other mechanical components.

In the bulk-materials processing industry, low-cost bags often come in irregular dimensions making them a challenge for automated machinery to handle.  Systems must be designed to measure, fill, and seal bags containing just about anything from salt to animal feed. This articel deals with these problems and uses a Minneapolis packaging equipment manufacturer's dilemma as an example of how such problems can be rectified.

This article, "Selecting Gearheads and Linear Actuators", offers an in-depth approach to calculating system inertia and torque requirements when choosing gearheads and other drive components for linear motion systems.

"Developments In Positioning Control" offers a look at recent developments by researchers in ways to improve the accuracy of linear positioning systems, reducing or eliminating backlash, and making these devices easier to use.