Servomotor technology contributes to productivity

Servo drive control: Improved computing power advances servo motor technology. Fast processors in PC-based controllers (especially multi-core PCs) enable updates to multiple servo control loops while handling machine control logic.

01/18/2013


Recent advances in servomotor technology also significantly reduce the cost of ownership. Beckhoff’s OCT (One Cable Technology) on AM8000 series servo motors combines the encoder signals with the power wires to eliminate one of the two cables between theVast improvement in computing power is perhaps the most significant contribution to servo motor technology. Fast processors in PC-based controllers (especially multi-core PCs) make it possible to update multiple servo control loops while still handling machine control logic. Take the case of robotic mechanisms using multiple servo motors; only the path of the end effectors’ motion needs to be programmed instead of dealing with the motion of each individual motor. This abstraction permits faster development and more creative robotic implementations. The open architecture of these PC-based controllers paired with intelligent software offers standardized programming tools. These tools facilitate easier implementation of control routines and provide advanced preprogrammed routines though software libraries.

Networking advances make it possible for servomotors to better coordinate their activities. For example, the EtherCAT network with its distributed clock technology provides the tight control required by demanding robotic and CNC applications. EtherCAT enables setup and testing to all the components in a system through one standard connection to eliminate the need to plug into each drive separately.

Recent advances in servomotor technology also significantly reduce the cost of ownership. Servo motors that use one cable technology (OCT) combines the encoder signals with the power wires to eliminate one of the two cables between the motor and drive. Cables represent about 10% of the hardware cost in a typical installation. The potential savings from OCT increase when the installation and other indirect costs are considered.

Vast improvement in computing power is perhaps the most significant contribution to servo motor technology. Fast processors in PC-based controllers (especially multi-core PCs) make it possible to update multiple servo control loops while still handling ma

A handful of motor advancements put together have increased the motor’s peak torque and continuous torque output. The peak torque is the amount of torque the motor can provide for short periods of time; the continuous torque is the amount of torque the motor can output forever. The continuous torque rating also reflects the amount of torque the motor can provide when the total torque profile is leveraged over time, commonly referred to as the motor’s duty cycle. More torque in a smaller package is a significant cost reduction in itself, but smaller servomotors can be used when you consider the torque ratio.

In a typical application, the torque needed to accelerate a mechanical system is orders of magnitude greater than the torque needed to overcome friction. This generally results in a low, continuous torque requirement since the motor isn’t constantly accelerating. Servomotors have a peak-to-continuous torque ratio in the neighborhood of three, while others can approach seven.

- Gary Kirckof is application engineer manager, Beckhoff Automation. Edited by Mark T. Hoske, content manager, CFE Media, Control Engineering and Plant Engineering, mhoske@cfemedia.com.

www.beckhoffautomation.com/drivetechnology 

ONLINE

At www.controleng.com search Beckhoff Automation.



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Your leaks start here: Take a disciplined approach with your hydraulic system; U.S. presence at Hannover Messe a rousing success
Hannover Messe 2016: Taking hold of the future - Partner Country status spotlights U.S. manufacturing; Honoring manufacturing excellence: The 2015 Product of the Year Winners
Inside IIoT: How technology, strategy can improve your operation; Dry media or web scrubber?; Six steps to design a PM program
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Warehouse winter comfort: The HTHV solution; Cooling with natural gas; Plastics industry booming
Managing automation upgrades, retrofits; Making technical, business sense; Ensuring network cyber security
Designing generator systems; Using online commissioning tools; Selective coordination best practices

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
This article collection contains several articles on the vital role that compressed air plays in manufacturing plants.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
This article collection contains several articles on strategic maintenance and understanding all the parts of your plant.
click me