Why you should look beyond the spec sheet when choosing movement architecture

When machine builders specify motion systems, it’s easy to get caught up in the numbers. Torque, speed, power density and price are all clear and measurable factors and provide an easy way to compare components. But in modern machine design, these figures rarely tell the full story.

In practice, many of the biggest challenges in automation arise not from the performance of components, but from the way systems are put together. Integration, commissioning and troubleshooting often determine whether a machine is delivered on time and works as expected.

As a result, choosing the right motion architecture isn’t so much about selecting the most capable individual components, but rather about understanding how the entire system will behave during use.

The hidden cost of design time

One of the most overlooked factors in motion system design is design time. When comparing components, it’s common to focus on the initial cost, which can make a low-cost unit or controller attractive when viewed in isolation. However, this approach can lead to unintended consequences if it increases the time required to integrate and commission the system.

Remember that every additional hour spent configuring communication, writing custom code, or diagnosing unexpected behavior delays the machine’s startup. In turn, this delays production and increases the overall cost of the project. In many cases, the cost of lost time can far outweigh any savings made on hardware.

For this reason, time to commission should be considered alongside traditional performance metrics. Systems that are easier to set up, quicker to debug, and more intuitive to use can offer significant value, even if the initial purchase price is higher.

Integration on individual components

Modern motion systems are rarely built from a single device. A typical machine may include controllers, drives, motors, I/O, and human-machine interfaces, all of which must communicate reliably.

When these components come from different vendors, integration can become a significant task. Differences in communication protocols, configuration methods, and software environments often require additional technical effort to resolve. Even with increasing standardization, such as the adoption of protocols like OPC UA, achieving seamless interoperability is not always easy.

This is why systems-level thinking is becoming increasingly important. Instead of selecting components based solely on individual specifications, engineers must consider how easily they can be combined into a functioning whole.

Reducing the effort required to get devices to communicate and behave as expected can have a direct effect on development time and long-term reliability, again generating significant savings in manufacturing and reduced maintenance costs.

The role of software and tools in motion control

As motion systems become more capable, software plays an increasingly central role in their performance. The engineering environment used to configure and program a system can be as important as the hardware itself.

Three areas are particularly relevant. The first is configuration. Ideally, devices should be quick to connect and simple to set up, with minimal manual intervention.

The second is scheduling flexibility. Support for widely used standards, such as IEC 61131 languages, allows engineers to work in a way that suits their application and experience.

The third is diagnostics. Effective troubleshooting tools facilitate the identification and resolution of problems during commissioning and operation.

On a practical level, these tools can also help limit the impact of any shortfalls in access to qualified staff. The reality of modern business conditions means that many facilities no longer have large teams of experienced engineers to support complex systems. As a result, it is increasingly important to specify solutions that are easier to understand and maintain and that are well supported by the vendor.

A broader vision of movement systems

Taken together, these considerations point to a broader way of thinking about motion control. Instead of focusing solely on component specifications, engineers are increasingly evaluating the performance of systems throughout their entire lifecycle, from initial configuration through continuous operation.

Integrated platforms, where controllers, drives and software tools are designed to work together, can help reduce complexity and shorten development cycles. Vendors like Kollmorgen, part of Regal Rexnord, have responded to this shift by developing motion solutions that emphasize ease of integration and usability along with performance.

For machine builders, the challenge is to look beyond the spec sheet and consider how their design choices will affect the time, effort and expertise needed to deliver a working system. In modern automation, the most effective solutions are not always the most powerful on paper, but those that allow machines to be built, commissioned and maintained safely.

About the author

Allen Tubbs is a product manager at Kollmorgen. Prior to joining the company, Tubbs spent 19 years at Bosch Rexroth, where he served as a senior controls research and development engineer, product manager and applications engineer.